Introduction
This manual provides essential instructions for the safe and effective use of your Serta Plush Heated Mattress Pad. Please read all instructions carefully before use and retain this manual for future reference. This heated mattress pad is designed to provide warmth and comfort, featuring multiple heat settings and an automatic shut-off timer.
Important Safety Information
To reduce the risk of burns, electric shock, fire, or injury, this product must be used in accordance with the following instructions:
- Do not use with infants, children, incapacitated individuals, or anyone insensitive to heat.
- Do not use on an adjustable bed unless the mattress pad is designed for such use.
- Ensure the controller is never covered during use to prevent overheating.
- Do not use pins or other metallic objects with this product.
- Do not use if wet.
- Always unplug the mattress pad from the electrical outlet when not in use.
- This product is ETL certified, indicating compliance with North American safety standards.
Package Contents
Your Serta Plush Heated Mattress Pad package includes:
- 1 x Serta Plush Heated Mattress Pad (Twin size: 39"W x 75"L + 15"D)
- 1 x Controller with 11 ft cord (Queen and larger sizes include 2 controllers)
Setup Instructions
- Unpack: Carefully remove the heated mattress pad and controller(s) from the packaging.
- Position on Mattress: Place the heated mattress pad directly on your mattress. Ensure it is spread evenly and smoothly. The deep pocket design with 360-degree elastic fits mattresses up to 17 inches thick.
- Connect Controller: Locate the connector on the mattress pad. Firmly plug the controller cord into this connector. Ensure a secure connection.
- Plug into Power: Plug the power cord from the controller into a standard 120V AC electrical outlet. For Queen and larger sizes with two controllers, each controller must be plugged into a separate electrical outlet.
- Placement: Position the controller(s) in an easily accessible location, ensuring the cord is not pinched or covered.


Operating Instructions
- Power On/Off: Press the 'ON/OFF' button on the controller to turn the mattress pad on or off.
- Adjust Heat Settings: Use the '+' and '-' buttons to cycle through the 10 available heat settings. The current heat level will be displayed on the LCD screen. Heat ranges from approximately 78°F to 98°F, varying based on ambient room temperature.
- Set Auto Shut-Off Timer: Press the 'TIMER' button to adjust the automatic shut-off time. You can set the timer in 1-hour increments, from 1 to 12 hours. The selected time will be displayed.
- Dual Control (Queen and Larger): For Queen and larger sizes, each side of the bed has an independent controller, allowing individual temperature and timer settings for each user.

Care and Maintenance
Proper care ensures the longevity and performance of your heated mattress pad. Always disconnect the controller(s) from the mattress pad and unplug from the wall outlet before cleaning.
Washing Instructions:
- Machine washable.
- Wash by hand or with a delicate cycle.
- Use cold water and minimal detergent.
Drying Instructions:
- Remove immediately after the spin cycle.
- Tumble dry on medium or low heat for 5 minutes.
- Gently stretch and hang to finish drying.
- Do not hang with clothespins.
- Do not iron.

Troubleshooting
If your Serta Plush Heated Mattress Pad is not functioning as expected, please refer to the following common issues and solutions:
- No Heat/Power:
- Ensure the power cord is securely plugged into a working electrical outlet.
- Verify that the controller cord is firmly connected to the mattress pad.
- Press the 'ON/OFF' button on the controller.
- Uneven Heating:
- Ensure the mattress pad is spread smoothly on the bed without folds or wrinkles.
- Check that no heavy objects are placed on the pad, which could impede heat distribution.
- Controller Display Not Working:
- Unplug the unit from the wall outlet for 5 minutes, then plug it back in.
- Ensure all connections are secure.
If problems persist after attempting these solutions, please refer to the Warranty and Support section.
Specifications
| Brand | Serta |
| Model Name | Plush Heated Mattress Pad - Electric Bed Warmer |
| Model Number | ST55-0254 |
| Size (Twin) | 39"W x 75"L + 15"D |
| Material | 100% Polyester |
| Heat Settings | 10 |
| Auto Shut-Off Timer | 1-12 hours (in 1-hour increments) |
| Special Feature | Automatic Shut Off, Deep Pocket (up to 17" mattress) |
| Care Instructions | Machine Washable |
| Certifications | ETL Certified |
| UPC | 022164187694 |
Warranty and Support
The Serta Plush Heated Mattress Pad comes with a 5-year warranty. For warranty claims, technical support, or any product-related inquiries, please contact the manufacturer, E&E Co. Ltd DBA JLA Home, or your retailer. Please have your model number (ST55-0254) and proof of purchase available when contacting support.





