Introduction
Thank you for choosing the Serta Multi-Zone Heated Mattress Pad. This manual provides essential information for the safe and effective use of your new product. Please read all instructions carefully before use and retain this manual for future reference.
This heated mattress pad is designed to provide personalized warmth with independent body and foot temperature zones, 10 heat settings, and an automatic shut-off timer for enhanced comfort and safety.
Important Safety Information
Please observe the following safety precautions to reduce the risk of fire, electric shock, or injury:
- Do not use this heated product on waterbeds, bunk beds, adjustable mechanical beds, or children's cribs and beds.
- Ensure the product is properly installed and connected according to the setup instructions.
- Do not use with damaged cords or plugs. If the cord or plug is damaged, contact customer support.
- Do not use if wet.
- Do not use pins or other metallic objects with this product.
- Do not dry clean this product. Dry cleaning solvents may damage the insulation of the heating element.
- Always unplug the product when not in use.
- This product is ETL certified for safety.
Package Contents
Your Serta Multi-Zone Heated Mattress Pad package includes:
- Serta Multi-Zone Heated Mattress Pad (Twin Size: 75 x 39 x 15 inches)
- One (1) Controller (for Twin, Twin XL, and Full sizes)
- User Manual
Note: Queen, King, and California King sizes include two individual controllers.
Setup Instructions
- Prepare Your Bed: Ensure your mattress is clean and dry.
- Position the Mattress Pad: Place the Serta Multi-Zone Heated Mattress Pad directly on top of your mattress. Ensure the pad is centered and evenly spread.
- Secure the Pad: The pad features a 15-inch deep poly skirt with a 360° elastic edge. Stretch the skirt over the corners and sides of your mattress to ensure a snug and secure fit. This design accommodates mattresses up to 17 inches high.
- Connect the Controller: Locate the connection port on the mattress pad, typically positioned at the foot end. This port is designed to be tucked beneath the mattress surface for uninterrupted comfort. Carefully align the arrows on the controller's connector with the arrows on the pad's port and push firmly until it clicks into place.
- Plug into Power: Plug the controller's power cord into a standard 120V/60Hz wall outlet. Do not use power strips, extension cords, or splitters.


Operating Instructions
Your Serta Multi-Zone Heated Mattress Pad features an intuitive controller for personalized comfort.

- Power On/Off: Press the power button (U) to turn the mattress pad on or off.
- Adjust Body Heat: Use the 'BODY +' and 'BODY -' buttons to select your desired heat level for the upper body zone. There are 10 heat settings available.
- Adjust Feet Heat: Use the 'FEET +' and 'FEET -' buttons to select your desired heat level for the foot zone. There are 10 heat settings available. This allows for independent temperature control, keeping your feet warmer if desired.
- Set Auto Shut-Off Timer: Press the timer button (CLOCK ICON) to cycle through the 1-12 hour auto shut-off options. The pad will automatically turn off after the selected duration.

Note: For Queen, King, and California King sizes, two controllers are provided, allowing each side of the bed to have independent body and feet temperature adjustments.
Video 1: This video demonstrates the features and operation of the Serta Microfiber Zoned Electric Mattress Pad, including its multi-zone heating and ease of use.
Care and Maintenance
The Serta Multi-Zone Heated Mattress Pad is designed for easy care.

- Detach Controllers: Always ensure all controllers are detached from the mattress pad before washing.
- Washing: Machine wash on a delicate cycle in cold water with minimal detergent.
- Rinsing: Rinse thoroughly.
- Drying: Remove immediately after the spin cycle. You may hang to dry or tumble dry on low or medium heat for 5 minutes. Remove damp bedding from the dryer, gently stretch and straighten any bent or twisted wires to preserve shape and functionality, then hang to finish drying.
- Do Not Bleach or Iron: Do not use bleach or iron the mattress pad.
- Storage: When storing, do not compress it or put anything on top of it. Rolling the mattress rather than folding it is recommended to prolong the life of your electric blanket.
Troubleshooting
Refer to the following common issues and solutions:
- Q: Why is my light blinking?
A: Unplug and reconnect the controller to try again. Make sure the controller is well connected. If it still doesn't work, please reach out directly to customer support. - Q: My controller feels warm to the touch: is this a problem?
A: No. The control will feel warm (not hot) to the touch when functioning properly. Even when the controller is off, small amounts of electricity will cycle through it, which may make the controller warm. - Q: Is there a special way I should store this at the end of the season?
A: To prolong the life of your electric blanket, we recommend rolling the mattress rather than folding it. When storing it, do not compress it or put anything on top of it. Doing so can cause damage to the wires which could affect functionality. - Q: I heard a pop and/or smell smoke. Is my blanket going to catch on fire?
A: This is not a dangerous situation, but it can/will affect the functionality of the product. This most likely means that the fuse in the controller has blown for safety reasons and the product has been disabled. Please contact us. - Q: Can I plug it into a power strip, extension cord or splitter?
A: We do not recommend using a power strip, extension cord or splitter.
Specifications
| Feature | Detail |
|---|---|
| Brand | Serta |
| Model Number | ST55-4536 |
| Color | White |
| Size (Twin) | 75 x 39 x 15 inches |
| Item Weight | 4.25 pounds |
| Fabric Type | Microfiber |
| Material Composition | 85gsm microfiber, 150gsm filling, 40gsm non-woven wire channel, 15" poly skirt 90gsm |
| Heat Settings | 10 |
| Auto Shut-off Timer | 1-12 hours adjustable |
| Special Features | Automatic Shut-off Timer, Temperature Control, Multi-Zone Heating |
| Product Care | Machine Washable |
| Water Resistance | Not Water Resistant |
| UPC | 022164611243 |
Warranty and Support
Your Serta Multi-Zone Heated Mattress Pad is backed by a manufacturer's warranty. For specific warranty details, please refer to the documentation included with your product or contact Serta customer support.
For any questions, troubleshooting assistance, or warranty claims, please contact the manufacturer, E&E Co. Ltd DBA JLA Home, or visit the official Serta website for support resources.
Note: The product is ETL certified for safety and built for long-lasting reliability.





