Whirlpool Undercounter Dishwasher

Model DU1099XT Series

Use & Care Guide

Before You Use Your Dishwasher

It is your personal responsibility and obligation to ensure your dishwasher:

See installation instructions for complete information.

Important Safety Instructions

WARNING - When using your dishwasher, follow basic precautions, including the following:

  1. Read all instructions before using the dishwasher.
  2. DO NOT let children play in or on the dishwasher.
  3. DO NOT reach into the area below the bottom rack until the Heating Element has cooled for at least 20 minutes.
  4. DO NOT wash plastic items unless marked "Dishwasher Safe" or the equivalent. If not marked, check manufacturer's recommendations.
  5. Store dishwasher detergent in a cool, dry place WHERE CHILDREN CAN'T REACH IT.
  6. Use ONLY detergents and rinse aids recommended for use in a dishwasher.
  7. REMEMBER, use your dishwasher only for the job it was designed to do.
  8. Locate sharp items and knives so that they are not likely to damage the door seal or cut the user.
  9. Properly connect to electricity and water.
  10. DISHWASHER MUST BE ELECTRICALLY GROUNDED. Read the Installation Instructions for details.
  11. DO NOT use your dishwasher unless all enclosure panels are properly in place.
  12. Be sure your dishwasher is installed on a level floor that will hold the weight, and in an area suitable for its size and use.
  13. DO NOT sit, stand on, or abuse the dishwasher door or dish racks.
  14. DO NOT tamper with controls.
  15. When discarding an old dishwasher, always remove the door to prevent accidental entrapment.
  16. WARNING: If hot water has not been used recently (usually two weeks or longer), hydrogen gases may build up in the water heater and the hot water pipes. HYDROGEN GAS IS EXPLOSIVE. To prevent injury or damage, before using your dishwasher, turn on all hot water faucets and allow water to run for several minutes. This will allow gases to escape. Do not smoke or use any open flame near the faucet while it is open.
  17. WARNING: Disconnect electrical power to the dishwasher before attempting to service.

SAVE THESE INSTRUCTIONS

Parts and Features

Diagram: A detailed line drawing illustrates the interior components of the Whirlpool Undercounter Dishwasher. Key parts labeled include: UPPER SPRAY ARM, TOP RACK, RACK BUMPER, BOTTOM RACK, DETERGENT DISPENSERS, USER GUIDE (Permanent Label), HEATING ELEMENT, DOOR COLOR PANEL, SPRAY TOWER, LOWER SPRAY ARM, SILVERWARE BASKET, MODEL AND SERIAL NUMBER PLATE (not shown), and THE OVERFLOW PROTECTOR. The overflow protector is described as being designed to prevent too much water from entering the dishwasher and is not removable.

Copy Your Model and Serial Numbers Here...

When you need service or call with a question, have this information ready:

  1. Complete Model and Serial Numbers (from the plate located as shown).
  2. Purchase date from sales slip.

Copy this information in these spaces. Keep this book and your sales slip together in a handy place.

Model Number: [Space for Model Number]

Serial Number: [Space for Serial Number]

Purchase Date: [Space for Purchase Date]

Service Company and Telephone Number: [Space for Service Company and Telephone Number]

Thank you for purchasing a Whirlpool product. Please complete and mail the Owner Registration Card furnished with this product.

For Best Results

Your dishwasher cleans by spraying a mixture of hot, clean water and detergent against soiled surfaces of dishes. When a cycle is started, the dishwasher fills with water to about the level of the heating element. This water is pumped through the rotating spray arms, drained through the filter system which removes food and soil, and pumped back through the rotating spray arms. Soiled water is pumped out and replaced with clean water during a cycle; the number of times depends on the cycle being used.

Diagram: Dishes are shown loaded in the top rack, with soiled surfaces facing the spray from the rotating arms.

The Filtering System

The self-cleaning filtering system and removable pump guard help eliminate pre-rinsing by removing food particles from the water.

It is not necessary to rinse dishes before putting them into the dishwasher. Just remove large pieces and quantities of food and bones. The filtering system helps keep food particles out of the wash water. Small particles are flushed away as water is pumped out. Larger particles are trapped in the pump guard.

To remove the pump guard for cleaning:

  1. Wait at least 20 minutes after a cycle for the heating element to cool down.
  2. Unload and remove the bottom rack.
  3. Press the outside wall of the pump guard at the center to release the latch.
  4. Lift out and rinse clean.

To replace the pump guard:

  1. Insert pump guard legs (on inside wall) into matching openings in filter screen.
  2. Press down on outside wall until latch snaps into place.
  3. Replace bottom rack with rack bumpers in front.

Water Must Be Hot

For best cleaning and drying results, water should be at least 140°F (60°C).

  1. Turn on hot water faucet nearest the dishwasher. Let water run until it is as hot as possible.
  2. Hold a candy or meat thermometer in the stream of hot water to measure the temperature.
  3. If the temperature is too low, have a qualified person raise the water heater thermostat setting.

Diagram: A thermometer shows 140°F (60°C) next to a faucet, illustrating checking water temperature.

Quiet Operating Tips

To avoid thumping and clattering noises during operation:

NOTE: Keep sink drain plugs inserted during dishwasher operation to prevent noise transfer through drains.

Proper Loading

Always load dishes so soiled surfaces are reached by spray from rotating spray arms. Water must be able to drain off completely for best drying results. Be careful to separate items so spray can reach all surfaces.

Top Rack Loading

The top rack is designed for cups, glasses, and smaller items.

Diagram: Illustrates loading cups and glasses in the top rack, showing items placed between prongs, not over them, to prevent breakage. Also shows how lightweight items should be held firmly and delicate items should not touch each other.

Diagram: Shows a mixed load in the top rack, with plastic items placed there and recommended for dishwasher-safe items.

Diagram: Shows utensils loaded in the top rack, including small bowls and pans.

Tips:

Bottom Rack Loading

Diagram: Shows a mixed load in the bottom rack, with plates and bowls facing the spray.

Diagram: Shows a dish load in the bottom rack, with plates and bowls positioned correctly.

Diagram: Shows utensils loaded in the bottom rack, including cookie sheets and cake pans placed at the sides and back.

NOTE:

Silverware Basket Loading

Load the silverware basket while it's in or out of the bottom rack. The loaded basket should be in the right front corner of the bottom rack.

Diagram: Shows a silverware basket with "NO" and "YES" examples. "NO" shows items nested together, while "YES" shows items mixed with handles up and down.

Diagram: Shows sharp items like knives and skewers placed point down in the silverware basket, and long items positioned to not obstruct the spray arm.

Make sure sharp items (knives, forks, skewers, etc.) are put point down. Make sure long items do not stop the upper spray arm from turning.

Adding Detergent

The kind and amount of dishwasher detergent you use is an important part of getting your dishes clean. Read this section carefully.

Diagram: Shows a container labeled "PHOSPHORUS CONTENT".

The Detergent Dispenser

The detergent dispenser has one section with a cover and one without.

The cover opens automatically when the main wash starts. Detergent in the open section falls into the dishwasher when the door is closed.

Diagram: Shows the detergent dispenser with its COVER and COVER LATCH labeled. It indicates which section to use for the LIGHT Cycle (covered section) and for the NORMAL Cycle (both sections).

How Much Detergent to Use

The amount of detergent to use depends on the hardness of your water. If too little is used, dishes won't be clean. However, if too much is used in soft water, glassware will begin to etch.

Find out your water's hardness by asking your local water department, water softener company, or county extension agent.

Before Starting Your Dishwasher

  1. Read "Important Safety Instructions" on page 2 before starting your dishwasher.
  2. Spin the Upper and Lower Spray Arms to make sure nothing will stop them from turning freely.
  3. Push door firmly when closing and it will automatically latch.
  4. Run hot water at the sink nearest the dishwasher until it is hot. Turn it off.

Diagram: Shows the dishwasher control panel with DRY SELECTOR SWITCH and DOOR LATCH labeled.

Starting Your Dishwasher

NORMAL WASH cycle:

  1. Select a drying option.
  2. Turn Cycle Control Knob clockwise to the dot marked NORMAL. The dishwasher will automatically start that cycle.

LIGHT WASH cycle:

  1. Select a drying option.
  2. Turn Cycle Control Knob clockwise to the dot marked LIGHT. The dishwasher will automatically start that cycle.

Diagram: A hand is shown turning the CYCLE CONTROL KNOB.

Selecting a Cycle

NORMAL WASH Cycle

A double wash for normal to heavily soiled loads. (The Energy Guide Label data is based on this cycle.) Cycle time is about 65 minutes.

Diagram: Shows the cycle sequence: WASH, RINSE, WASH, RINSE, DRY, OFF.

LIGHT WASH Cycle

For normal, everyday soiled loads. Cycle time is about 60 minutes.

Diagram: Shows the cycle sequence: WASH, RINSE, DRY, OFF.

RINSE & HOLD Cycle

For rinsing a few items to be washed one or more days later. Cycle time is about 10 minutes. Use AIR DRY only.

Diagram: Shows the cycle sequence: RINSE, RINSE, RINSE, RINSE, DRY, OFF.

HEAT DRY or AIR DRY?

If the HEAT DRY Option is selected, air in the dishwasher is heated during the "dry" part of the cycle.

If the AIR DRY Option is selected, air in the dishwasher is not heated. Using this option helps save energy, but dishes take longer to dry (overnight) and some water spotting may result. Some items (such as plastics) may need towel drying.

For best results, use a solid rinse aid.

Changing a Setting

You can change a setting anytime during any cycle.

  1. Lift up on the door latch to unlatch the door and stop the cycle. Don't open the door until the spray arms stop spinning.
  2. Turn the Cycle Control Knob clockwise to the cycle you want.
  3. Be sure the detergent dispensers are filled properly for the new cycle.
  4. Press door firmly to latch it. The dishwasher will automatically start the new cycle.

To Add a Dish After Starting

  1. To be sure the added item is washed and rinsed, make sure the Cycle Control Knob has not passed LIGHT.
  2. Lift up on the door latch to unlatch the door to stop the cycle. Don't open the door until the spray arms stop spinning.
  3. Open the door and add the dish.
  4. Close the door. Do not latch it. Wait 30 seconds for air in the dishwasher to warm up. This helps reduce the amount of moisture that can come from the vent when restarting the cycle.
  5. Press door firmly to latch it. The dishwasher will automatically start where it stopped.

Energy Saving Tips

You can help save energy if you:

  1. Wash full loads. Running a half-filled dishwasher uses the same amount of electricity and hot water as a fully loaded machine.
  2. Use the LIGHT WASH Cycle for normally soiled loads. It uses less hot water and energy than NORMAL WASH.
  3. Air dry dishes when you don't need a rapid drying cycle. Allow longer drying times (overnight).
  4. Load correctly for best washing results. Incorrect loading may cause poor washing and the need to rewash all or part of the load.
  5. Don't pre-rinse normally soiled dishes. Select the correct cycle for the load and use the recommended amount of detergent for good washing results without hand rinsing.
  6. Use your dishwasher during off-peak hours. Local utilities recommend this to avoid heavy usage of energy at certain times of day.
  7. Kitchen cleanup can be done quickly and efficiently through the use of your dishwasher. Most appliance parts that can fit in the dishwasher can be cleaned by it. Burned-on soil, however, should be cleaned by hand.

Diagram: Illustrates washing full loads, selecting the light wash cycle, air drying dishes, and correct loading.

Special Tips on Dishwasher Use

Remember, use your dishwasher only for the job it was designed to do. Some items are not dishwasher safe or may require special care. Read these special tips for the following items:

Aluminum

Aluminum loses its bright, shiny appearance and darkens in color due to minerals in the water and the alkalinity of the dishwasher detergent. Colored aluminum may fade.

TIPS: If washed in the dishwasher, avoid placing directly in front of the detergent dispenser where it could be sprinkled with undissolved detergent, causing spotting, pitting, and discoloration. Follow utensil manufacturers' cleaning instructions.

China

Hand-painted, metal-trimmed, and antique china fade due to high water temperatures and alkaline detergent solution in the dishwasher. NOTE: Delicate, antique items should not be washed in the dishwasher.

TIPS: Load china carefully. Do not allow pieces to touch each other. Test one piece by washing it daily in the dishwasher for several weeks. Then compare it with the rest of the set to see if colors have changed.

Crystal and Decorative Glasses

Crystal can break from sudden exposure to high water temperature. Metal trim and colorful decoration on glass will fade in time when washed in the dishwasher. NOTE: Delicate, antique items should not be washed in the dishwasher.

TIPS: Load crystal carefully in the top rack only. Be sure to load a few larger items in the bottom rack to reduce the amount of force of water spray reaching glassware from the lower spray arm. Use the shortest cycle.

Flatware

Salty and acidic foods may tarnish silver and stainless flatware if allowed to remain on the utensils. A film may form on sterling silver and silver plate items washed in a dishwasher. This film is caused by the reaction of silver with chlorine in the detergent. Gold flatware is not dishwasher safe.

TIPS: Rinse flatware as soon as possible, especially if it is not to be washed right away. Dishwasher detergent may remove antique finishes. Wash by hand. Tarnish and film build-up can be removed with silver polish.

Cast Iron Utensils

The seasoned finish will be removed in the dishwasher. Rusting will result.

TIPS: Wash by hand. To re-season, coat with unsalted fat and heat in a slow oven for an hour or two.

Plastics

Many plastics will have "Dishwasher Safe" written on them. Some plastics are heat sensitive and may melt or warp.

TIPS: If in doubt, try one piece. Place in upper rack only. AIR DRY option provides additional protection.

Non-stick Finish Utensils

Most can be washed in the dishwasher.

TIPS: Follow manufacturers' suggestions.

Wood

Many wooden items will crack and warp or lose their finish.

TIPS: Do not wash cutting boards, wooden salad bowls, or knives with wooden handles in the dishwasher.

Pewter or Pewter-like Materials

May streak, discolor, and pit.

TIPS: To keep pewter at its very best, hand wash with mild detergent.

Dishwasher Care & Cleaning

Exterior: Regular use of a soft damp cloth or sponge and a mild detergent is all that is necessary, in most cases, to keep the outside of your dishwasher nice looking and clean.

Interior: Hard water minerals may cause a white film to build-up on the inside surfaces, especially just beneath the door area. Wear rubber gloves when cleaning the dishwasher interior. Do not use any type of cleanser other than dishwasher detergent because it may cause foaming or sudsing.

Common Dishwashing Problems

ProblemCaused BySolution
Spotting and filming (hard water film)Hard waterFill detergent dispensers to capacity. Use dishwasher detergent with highest available phosphorus content. May be necessary to install water softener.
To remove spots and film, try a vinegar rinse:
1. Wash and rinse load as usual. Use AIR DRY.
2. Remove all metal items.
3. Put 2 cups (500 mL) white vinegar in a container on the bottom rack.
4. Run dishwasher through a complete washing cycle.
Water is not hot enoughWater temperature should be at least 140°F (60°C). Set water heater thermostat to a higher setting. Run water at sink until hot before starting.
Not enough detergent, or improper detergentUse more dishwasher detergent. Use detergent with highest available phosphorus content, especially with hard water.
"Old" detergentUse only fresh dishwasher detergent. Store tightly closed container, in cool, dry place. Discard old detergent. Do not fill dispensers until ready to start dishwasher.
Small particles deposited on itemsImproper loadingMake sure dishes and glassware are loaded so spray reaches all surfaces and items drain properly. Do not overload. Do not nest items. Make sure large items do not block spray from reaching detergent dispensers.
No rinse aidTry a bar rinse aid such as Solid Jet DRY®. Follow package directions.
AIR DRY Setting usedDrying without heat may result in some spotting of glasses and silver.
Dishes not drySpray arm or arms not rotating freelyCheck spray arms to make sure they turn freely after loading. Be sure a utensil has not prevented their turning.
"Old" detergentUse only fresh dishwasher detergent. Store tightly closed container, in cool, dry place. Discard old detergent. Do not fill dispensers until ready to start dishwasher.
Not enough detergent, or improper detergentUse more dishwasher detergent. Use detergent with highest available phosphorus content, especially with hard water.
Water is not hot enoughWater temperature should be at least 140°F (60°C). Set water heater thermostat to a higher setting. Run water at sink until hot before starting.
Water pressure may be low, dishwasher is not filling properlyIf water pressure is low, do not use water for other purposes while dishwasher is running (to assure correct fills).
Water is not hot enoughWater temperature should be at least 140°F (60°C). Set water heater thermostat to a higher setting. Run water at sink until hot before starting.
Improper loadingMake sure dishes and glassware are loaded so spray reaches all surfaces and items drain properly. Do not overload. Do not nest items.
No rinse aidTry a bar rinse aid such as Solid Jet DRY®. Follow package directions.
AIR DRY Setting usedAllow more time when using AIR DRY Option, or use HEAT DRY. Plastic items may need towel drying.
Black marks on dishesAluminum utensils rubbing against items during washingUse care in loading aluminum utensils, especially any lightweight foil container. Place so they do not touch dishes. Remove black marks with plastic scouring pad and a mild abrasive cleanser.
Chipping or breaking glasswareImproper loadingDo not overload. Load glasses in the top rack only. Load between prongs, not over them. Glasses loaded over prongs will not be supported and may chip or break.
Dishes not washing cleanWater is not hot enoughWater temperature should be at least 140°F (60°C). Set water heater thermostat to a higher setting. Run water at sink until hot before starting.
Improper loadingMake sure dishes and glassware are loaded so spray reaches all surfaces and items drain properly. Do not overload. Do not nest items. Make sure large items do not block spray from reaching detergent dispensers.
Spray arm or arms not rotating freelyCheck spray arms to make sure they turn freely after loading. Be sure a utensil has not prevented their turning.
Not enough detergent or improper detergentUse more dishwasher detergent. Use detergent with highest available phosphorus content, especially with hard water.
"Old" detergentUse only fresh dishwasher detergent. Store tightly closed container, in cool, dry place. Discard old detergent. Do not fill dispensers until ready to start dishwasher.
Cloudy film on glassware, etching, permanent corrosionWater pressure may be low, dishwasher is not filling properlyIf water pressure is low, do not use water for other purposes while dishwasher is running (to assure correct fills).
Too much detergent in soft waterCheck for rainbow hue on glasses. A rainbow hue is the first sign of etching (corrosion of glass). Reduce the amount of dishwasher detergent. Use a detergent with a lower phosphorus content.
Inadequate rinsingIf water pressure is low, do not use water for other purposes while dishwasher is running (to assure correct water fills). Make sure dishes and glassware are loaded properly to assure adequate rinsing and draining. Do not overload.
Dishes & Interior of dishwasher yellow or brownIron or manganese in waterTemporary remedy:
1. Set empty dishwasher for a "one wash" cycle.
2. Start dishwasher and unlatch door to stop it when it has filled for the wash part of the cycle.
3. Add ½ to 1/2 cup (120 to 240 mL) of citric acid crystals (usually available in drugstores).
4. Close and latch door to complete cycle.
Permanent solution: Install an iron or manganese filter to home water supply.
Rust spots on stainless steel -OR- Dark spots on flatware, stainless steel, silver plate, or sterlingAllowing salty or acidic foods such as mayonnaise, vinegar, fruit juices, salad dressings, milk products to remain on flatware. Undissolved detergent coming in contact with flatwareRinse flatware that is to stand for several hours before washing (use Rinse & Hold). Clean stained items with silver polish and re-wash. Do not put stainless steel and silver flatware in the same silverware basket compartment. Direct contact between these metals can cause permanent damage to the silver.
Bronze tarnish on silverplateSilverplate is worn off. Exposed base metal takes on a bronzed hue.Remove spots with silver polish. Avoid spilling concentrated detergent on wet flatware.
Water left in bottom of dishwasherDishwasher cycle not completedAllow dishwasher to complete cycle.
Clogged drain air gapSome plumbing codes require use of a drain air gap between an undercounter dishwasher and the drain system of the house. The air gap is usually located above the sink or on the top of the counter near the dishwasher to prevent the possibility of water backing up from the drain into the dishwasher due to a plugged drain. The drain air gap is NOT a part of the dishwasher and is NOT covered by the dishwasher warranty. The drain air gap should be kept clean to insure proper draining of the dishwasher.

If You Need Service or Assistance, We Suggest You Follow These Five Steps:

1. Before Calling for Assistance...

Performance problems often result from little things you can find and fix yourself without tools of any kind.

If your dishwasher will not run, or stops during a cycle:

If water remains in the dishwasher:

If detergent remains in the covered detergent cup:

2. If You Need Assistance*...

Call Whirlpool COOL-LINE® service assistance telephone number. Dial free from anywhere in the U.S.:

1-800-253-1301

Talk with one of our trained Consultants. The Consultant can instruct you in how to obtain satisfactory operation from your appliance or, if service is necessary, recommend a qualified service company in your area.

3. If You Need Service*...

Whirlpool has a nationwide network of franchised TECH-CARE® Service Companies. TECH-CARE service technicians are trained to fulfill the product warranty and provide after-warranty service, anywhere in the United States. To locate TECH-CARE service in your area, call our COOL-LINE service assistance telephone number (see Step 2) or look in your telephone directory Yellow Pages under:

Diagram: Examples of Yellow Pages listings for appliance repair services, including Whirlpool specific listings.

4. If You Have a Problem*...

Call our COOL-LINE service assistance telephone number (see Step 2) and talk with one of our Consultants, or if you prefer, write to:

Mr. Robert Stanley
Division Vice President
Whirlpool Corporation
2000 M-63
Benton Harbor, MI 49022

5. If You Need FSP® Replacement Parts*...

FSP is a registered trademark of Whirlpool Corporation for quality parts. Look for this symbol of quality whenever you need a replacement part for your Whirlpool appliance. FSP replacement parts will fit right and work right, because they are made to the same exacting specifications used to build every new Whirlpool appliance.

*If you must call or write, please provide: model number, serial number, date of purchase, and a complete description of the problem. This information is needed in order to better respond to your request for assistance.

Whirlpool Dishwasher Warranty

LENGTH OF WARRANTY

WHIRLPOOL WILL PAY FOR

WHIRLPOOL WILL NOT PAY FOR

WHIRLPOOL CORPORATION SHALL NOT BE LIABLE FOR INCIDENTAL OR CONSEQUENTIAL DAMAGES. Some states do not allow the exclusion or limitation of incidental or consequential damages, so this limitation or exclusion may not apply to you. This warranty gives you specific legal rights, and you may also have other rights which vary from state to state.

Outside the United States, a different warranty may apply. For details, please contact your franchised Whirlpool distributor or military exchange.

Part No. 3368022 ©1988 Whirlpool Corporation Printed in U.S.A.

PDF preview unavailable. Download the PDF instead.

Use and Care Guide - 3368022 Acrobat PDFWriter 3.03 for Windows; modified using iTextSharp 4.1.6 by 1T3XT

Related Documents

Preview Whirlpool DU7800XS Series Undercounter Dishwasher Use and Care Guide
This guide provides essential information for using and caring for your Whirlpool DU7800XS Series Undercounter Dishwasher, including safety precautions, operating instructions, loading tips, maintenance advice, troubleshooting common issues, and warranty details.
Preview Whirlpool Dishwasher Daily Reference Guide | User Manual
Comprehensive guide for Whirlpool dishwashers covering first-time use, programs, options, maintenance, and troubleshooting. Find essential operating instructions and download manuals from Whirlpool.
Preview Whirlpool Dishwasher User Instructions Manual
This manual provides comprehensive user instructions for Whirlpool dishwashers, covering essential safety guidelines, detailed operation steps, features, maintenance, troubleshooting, and warranty information.
Preview Whirlpool Undercounter Dishwasher Use & Care Guide
Comprehensive guide for using, caring for, and troubleshooting your Whirlpool Undercounter Dishwasher (Model DU960). Includes safety instructions, loading tips, cycle selection, maintenance, and warranty information.
Preview Whirlpool Dishwasher User Instructions
Comprehensive user manual for Whirlpool dishwashers, covering safety, operation, features, maintenance, and troubleshooting. Learn how to get the best performance from your Whirlpool appliance.
Preview Whirlpool DU1800XT Undercounter Dishwasher Use and Care Guide
Comprehensive use and care guide for the Whirlpool DU1800XT Undercounter Dishwasher, covering safety instructions, parts identification, proper loading techniques, operational cycles, energy saving tips, special care for various materials, troubleshooting common problems, and warranty information.
Preview Whirlpool Undercounter Dishwasher Parts List and Diagrams
Detailed parts list and diagrams for Whirlpool Undercounter Dishwashers. Find replacement components for models including WDT720PADB2, WDT720PADW2, WDT720PADM2, WDT720PADE2, and WDT720PADH2, essential for maintenance and repair.
Preview Whirlpool DU5503XL Undercounter Dishwasher Use and Care Guide
Comprehensive guide for the Whirlpool DU5503XL undercounter dishwasher, covering safety instructions, parts, operation, loading, cycles, energy saving tips, special care, and troubleshooting.