Introduction
This manual provides essential instructions for the safe and effective use, setup, operation, and maintenance of your Sealy Heated Mattress Pad. Please read all instructions carefully before use and retain this manual for future reference.
Important Safety Instructions
When using electrical appliances, basic precautions should always be followed to reduce the risk of fire, electric shock, and injury to persons, including the following:
- Read all instructions before using this heated mattress pad.
- Do not use with infants, children, incapacitated persons, or anyone insensitive to heat.
- Do not use if wet.
- Do not use with a damaged cord or plug. If the cord or plug is damaged, do not attempt to repair it yourself. Contact customer service.
- Do not use with other heating devices.
- Do not use with a generator, power inverter, or adapter.
- Do not use if the mattress pad is folded, bunched, or creased.
- Do not tuck in the power cord or controller between the mattress and box spring.
- Do not dry clean. Dry cleaning solvents may damage the insulation of the heating element.
- Do not bleach or iron.
- Do not plug in and power up your heated product while damp. Do not use until it is completely dry.
- Always unplug the mattress pad from the electrical outlet when not in use.
- This product is for household use only.
The Sealy Heated Mattress Pad is ETL certified for quality and safety.

Image: A close-up of the Sealy Heated Mattress Pad with an ETL Safety Certified logo, indicating adherence to safety standards and low electromagnetic field emission.
Package Contents
Verify that all items are present in your package:
- Sealy Heated Mattress Pad (Full Size)
- Controller(s) with power cord(s)
- User Manual (this document)
Setup Instructions
- Unpack the Mattress Pad: Carefully remove the heated mattress pad from its packaging.
- Position the Pad: Place the mattress pad directly on your mattress with the tag end at the foot of the bed. Ensure it lies flat without any folds or creases.
- Secure the Pad: The mattress pad features 15-inch deep pockets with a strong elastic skirt to fit most mattresses securely. Stretch the elasticized skirt over the corners of your mattress to ensure a snug fit.
- Connect the Controller: Locate the connector on the mattress pad. Firmly push the controller cord connector into the pad's connector until it clicks into place. Ensure a secure connection.
- Route the Power Cord: Route the power cord(s) discreetly under the mattress or along the side of the bed to a nearby electrical outlet. Avoid placing the cord between the mattress and box spring.
- Plug into Outlet: Plug the power cord(s) into a 120V AC electrical outlet.

Image: A person demonstrating how the 15-inch deep pocket design of the Sealy Heated Mattress Pad fits snugly around a mattress, ensuring it stays in place.
Visual Setup Guide:
Video: An official Sealy video demonstrating the setup process of the heated mattress pad, including fitting it onto the bed, connecting the controller(s), and highlighting features like elastic fit, dual controls (for larger sizes), auto-off, heating, softness, waterproof design, and safety features. Note: While this video shows dual controllers, the Full size model typically uses a single controller.
Operating Instructions
Your Sealy Heated Mattress Pad features an easy-to-use controller with multiple heat and timer settings.

Image: A detailed view of the Sealy Heated Mattress Pad controller, showing the LCD screen, heat setting buttons (+/-), time setting buttons (+/-), power button, and indicating features like 1-12 hour auto-off, 10 heat settings, pre-heat, and setting memory.
- Power On/Off: Press the red power button on the controller to turn the mattress pad on or off. The LCD screen will illuminate when powered on.
- Adjust Heat Settings: Use the "HEAT" buttons (+ and -) to select your desired heat level. There are 10 heat settings available, from low to high.
- Set Auto-Off Timer: Use the "TIME" buttons (+ and -) to set the auto-off timer. You can choose a duration from 1 to 12 hours. The pad will automatically shut off after the selected time.
- Pre-Heat Function: The mattress pad includes a 20-minute pre-heat feature. To activate, turn on the pad and select your desired heat setting. The pad will apply full power for 20 minutes to quickly warm the bed, then adjust to your selected heat level.
- Setting Memory: The controller remembers your last used heat and time settings for convenience.
- Dual Controls (for Queen/King sizes): For Queen and King size mattress pads, two separate controllers are provided, allowing individual temperature control for each side of the bed. (Note: Full size models typically include a single controller).
Maintenance and Care
Proper care ensures the longevity and performance of your heated mattress pad.
- Disconnect Power: Always unplug the power cord(s) from the wall outlet and detach the controller(s) from the mattress pad before cleaning.
- Machine Washing: The heated mattress pad is machine washable.
- Wash on a gentle cycle in cold water (under 30℃ / 86℉).
- Use a mild detergent.
- Do not use bleach.
- Drying:
- Tumble dry on low heat or air dry.
- Ensure the mattress pad is completely dry before plugging it back in or using it.
- Do not iron.
- Do not dry clean.
- Storage: When not in use, store the mattress pad in a cool, dry place. Avoid folding it tightly or placing heavy objects on it, which could damage the internal wiring.

Image: A person placing the Sealy Heated Mattress Pad into a washing machine, illustrating its machine-washable feature for easy cleaning.
Waterproof Design:
The mattress pad features a waterproof design, allowing for convenient machine washing and protection against spills. Simply wipe away spills with ease.

Image: A hand wiping a liquid spill from the surface of the Sealy Heated Mattress Pad, demonstrating its water-repellent and easy-to-clean design.
Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Mattress pad is not heating. | Power cord not securely plugged in. Controller not connected properly. Electrical outlet not functioning. | Ensure all connections are firm. Check if the outlet is working by plugging in another appliance. Press the power button on the controller. |
| Controller display is blank or flashing. | Loose connection. Internal error. | Unplug the unit from the wall and the pad, then reconnect firmly. If the issue persists, contact customer service. |
| Uneven heating or cold spots. | Mattress pad is bunched or folded. | Ensure the mattress pad is spread flat and smooth on the bed. |
Specifications
- Brand: Sealy
- Model Name: Heated Mattress Pad
- Model Number: KTHM-ATMF-F / KTHM-QATMF-F
- Size: Full (54 x 75 inches)
- Fabric Type: 100% Polyester
- Material: 100% Polyester, cotton blend waterproof material
- Thread Count: 260
- Special Features: Breathable, Corded, Skin Friendly, Soft, Washable, Waterproof
- Heat Settings: 10 levels
- Auto Shut-Off: 1-12 hours
- Deep Pocket: Fits mattresses up to 15 inches deep
- Item Weight: 6.1 pounds
- Product Dimensions: 75 x 54 x 15 inches
- Manufacturer: KATA
- Certifications: ETL Certified
Warranty and Customer Support
Your Sealy Heated Mattress Pad is ETL certified for quality and comes with a quality guarantee. For any questions, concerns, or assistance regarding your product, please reach out to our customer service team.
Contact information for customer service can typically be found on the product packaging or the official Sealy website.
