The Morphy Richards EverCosy Electric Underblanket range provides adjustable warmth to help keep your bed comfortable and cosy.
Available in Standard and Premium Fleece finishes, with Single, Double, King and Super King sizes, EverCosy underblankets feature nine heat settings, an adjustable 1–9 hour automatic shut-off timer and built-in overheat protection.
This guide explains how to fit and use your electric underblanket safely, resolve common heating and controller problems, understand the automatic shut-off timer, and wash and care for your blanket.
Which EverCosy Electric Underblankets Does This Guide Cover?
This guide covers the following Morphy Richards models:
Standard Electric Underblankets
- 600120 – Single Electric Underblanket
- 600121 – Double Electric Underblanket
- 600122 – King Electric Underblanket
- 600123 – Super King Electric Underblanket
Premium Fleece Electric Underblankets
- 600020 – Single Premium Fleece Electric Underblanket
- 600021 – Double Premium Fleece Electric Underblanket
- 600022 – King Premium Fleece Electric Underblanket
- 600023 – Super King Premium Fleece Electric Underblanket
All eight models feature nine adjustable heat settings, a 1–9 hour automatic shut-off timer, detachable controls and overheat protection.
Important model difference: Standard King and Super King models 600122 and 600123 have two controllers, allowing each side of the bed to be adjusted independently. The other models have a single controller.
The Premium Fleece range has a softer polyester and teddy fleece finish, while the Standard range uses polyester fabric.
Where to find your model and serial numbers: Both can be found on the product packaging.
Quick Troubleshooting – Find Your Issue
Underblanket not hot enough or feels lukewarm? Check the heat setting, allow the bed to warm and ensure the blanket is fitted correctly. See Why Doesn't My Electric Underblanket Feel Warm Enough?
Underblanket not heating at all? Check the mains supply, controller connection and selected heat setting. See Electric Underblanket Not Heating.
Only one side of the blanket is heating? On dual-controller models 600122 and 600123, check that both controllers are switched on and correctly set. See Only One Side of My Electric Underblanket Is Heating.
Controller switches off after approximately 30 seconds? If no heat or timer setting is selected within 30 seconds of switching on, the controller automatically switches off. See Controller Switching Off After 30 Seconds.
Underblanket switches off during use? Check the selected automatic shut-off timer, which can be set between 1 and 9 hours. See Understanding the Automatic Shut-Off Timer.
Controller display is blank or buttons aren't responding? Check the power supply and controller connection. See Controller or Display Not Working.
Some areas feel warmer than others? Check that the blanket is fitted flat and securely attached to the mattress. See Uneven Heating or Cold Areas.
Need to wash your underblanket? The fabric blanket can be washed at a maximum of 40°C after disconnecting all controllers and power cables. See Cleaning and Washing Your Electric Underblanket.
How to Fit Your EverCosy Electric Underblanket to the Bed
Correct fitting is essential for safe operation and consistent heating performance.
EverCosy Electric Underblankets are designed to lie flat on top of the mattress, underneath a bedsheet or thin cotton-padded mattress cover.
Fitting instructions
- Remove all packaging and unfold the underblanket completely.
- Lay the blanket flat on top of the mattress, positioning the controller connection towards the head of the bed.
- Smooth out any folds, creases or bunching.
- Secure the elastic straps over the corners of the mattress to hold the blanket in position.
- Cover the underblanket with a bedsheet or thin cotton-padded mattress cover.
- Smooth out the covering to ensure the underblanket remains flat and securely fitted.
For dual-controller models 600122 and 600123, ensure both controller connections are positioned correctly and the cables can be accessed safely.
Important: The heated section of the underblanket must remain on top of the mattress. Never tuck the heated material underneath the mattress.
Do not use the underblanket on an adjustable bed.
Why must the elastic straps be fitted?
The elastic straps help prevent the underblanket from moving, folding or bunching during use.
If the blanket moves out of position, heat may become trapped in folded areas, increasing the risk of overheating or damage to the internal heating elements.
Always secure the underblanket correctly before switching it on.
Can I use my electric underblanket as a heated throw?
No.
EverCosy Electric Underblankets are designed specifically for use underneath the body, fitted flat on top of a mattress.
They must not be wrapped around the body, draped over someone or used as a heated throw.
Incorrect use can cause overheating, damage to the heating elements or injury.
How to Use Your EverCosy Electric Underblanket
Once the underblanket is correctly fitted:
- Ensure the supplied controller is securely connected to the blanket.
- Plug the appliance into a suitable mains socket.
- Press the On/Off button on the controller.
- The heat level display will initially show 0, and the automatic shut-off display will show 9 hours.
- Press the + button to increase the heat level until your preferred setting is displayed.
- Press the – button to reduce the heat level if required.
- Use the Auto Off button to select your preferred automatic shut-off time between 1 and 9 hours.
The underblanket will heat according to the selected settings.
To switch it off manually, press the On/Off button.
Important: After switching on, select a heat level or timer setting within 30 seconds. Otherwise, the controller will automatically switch off.
How do I use the dual controllers on models 600122 and 600123?
The Standard King (600122) and Super King (600123) underblankets have two controllers, allowing each side of the bed to be heated independently.
Each controller operates its own heating area.
- Ensure both controllers are securely connected.
- Switch on the controller for the side you want to heat.
- Select the preferred heat setting between 1 and 9.
- Set the automatic shut-off timer as required.
- Repeat with the second controller if you want to heat both sides.
You can select different heat levels and shut-off times for each side.
If only one controller is switched on, only its corresponding heating area will operate. This is normal and does not indicate a fault.
Understanding the Nine Heat Settings
All EverCosy Electric Underblankets feature nine adjustable heat settings, with an advertised temperature range of approximately 20°C to 57°C.
- Settings 1–3: Lower heat levels for gentle warmth.
- Settings 4–6: Medium heat levels for increased warmth.
- Settings 7–9: Higher heat levels for stronger warmth.
The settings allow you to adjust the warmth according to your preference.
The advertised temperature range describes the product's heating specification. It does not mean that the surface against your skin will remain at an exact temperature throughout use.
Which heat setting should I use overnight?
For prolonged use, particularly while sleeping, use a low heat setting.
Higher settings are better suited to warming the bed before settling down, rather than maintaining high temperatures against the body for extended periods.
Important: Prolonged exposure to heat can cause skin burns, even at temperatures that initially feel comfortable. Always reduce the heat setting if the blanket feels too warm.
The automatic shut-off timer provides additional protection but does not remove the need to select an appropriate heat level.
Why Doesn't My Electric Underblanket Feel Warm Enough?
If your EverCosy Electric Underblanket feels lukewarm, doesn't seem to get very hot or provides less warmth than expected, this does not necessarily indicate a fault.
Electric underblankets are designed to provide controlled warmth through the bedding rather than produce intense, immediate heat.
What should I check if my underblanket isn't warm enough?
- Check the heat setting. Make sure the controller is switched on and a heat level between 1 and 9 has been selected.
- Increase the setting gradually. If the blanket feels insufficiently warm, select a higher heat setting.
- Allow time for the bed to warm. The underblanket may take time to produce noticeable warmth, particularly in a cold bedroom.
- Check the fitting. Ensure the blanket is lying flat and securely attached to the mattress.
- Check the bedding. The underblanket should be covered with a bedsheet or thin cotton-padded mattress cover.
- Check the timer. Make sure the selected automatic shut-off period has not elapsed.
- For dual-controller models, check both sides. Make sure the controller for the affected side is switched on and correctly set.
If the underblanket produces noticeable warmth and responds to changes in the heat setting, this generally indicates that the heating function is operating.
If it remains cold, produces very little noticeable warmth at the highest setting or does not respond to changes in heat level, further investigation may be required.
Should my electric underblanket feel hot to the touch?
Not necessarily.
Electric underblankets are designed to warm the bed comfortably rather than produce an intensely hot surface.
The warmth you experience can vary depending on the heat setting, room temperature, bedding and how long the underblanket has been switched on.
A blanket that feels less hot than expected is not automatically faulty, but it should still produce noticeable warmth when operating correctly.
Never fold, bunch up or place heavy objects on the underblanket to try to increase its temperature. This can cause overheating, burns or damage to the heating elements.
Electric Underblanket Not Heating
If your underblanket remains completely cold, follow these checks:
- Check the mains connection. Ensure the plug is securely connected.
- Test the socket. Try another electrical appliance to confirm the socket is working.
- Check the controller connection. Switch off and unplug the underblanket before ensuring the supplied controller is securely attached.
- Switch on the appliance. Press the On/Off button.
- Select a heat setting. Use the + button to select a level between 1 and 9.
- Check the timer. Ensure the automatic shut-off period has not elapsed.
- Allow time for heating. Check whether the blanket begins producing noticeable warmth.
For dual-controller models 600122 and 600123, repeat the checks for the affected controller.
If the controller operates normally but the underblanket remains completely cold, the heating system may not be working correctly.
If the problem continues, stop using the appliance and contact Morphy Richards Customer Support.
Only One Side of My Electric Underblanket Is Heating
This section applies to the dual-controller models:
- 600122 – Standard King Electric Underblanket
- 600123 – Standard Super King Electric Underblanket
These models have two independently controlled heating areas.
If one side is heating and the other remains cold:
- Check that both controllers are connected securely.
- Ensure the controller for the cold side is switched on.
- Select a heat level between 1 and 9 on the affected controller.
- Check that its automatic shut-off timer has not elapsed.
- Switch off and unplug the appliance before checking the controller connection.
- Inspect the affected side and controller for visible damage.
If one side works normally but the other remains cold despite the controller being correctly connected and switched on, there may be a fault with that heating area or controller.
Stop using the affected side and contact Customer Support.
Never swap controllers between connections unless specifically authorised by Morphy Richards. Only use the controllers supplied with the appliance.
Controller Switching Off After 30 Seconds
If your controller switches off shortly after being turned on, this may be normal operation.
When first switched on, the controller displays:
- 0 on the heat level display.
- 9 on the automatic shut-off display.
If neither a heat level button nor the Auto Off button is pressed within 30 seconds, the controller automatically switches off.
How to prevent this
- Press the On/Off button.
- Select a heat setting using the + or – buttons within 30 seconds.
- Adjust the automatic shut-off timer if required.
If the controller has already switched off, press the On/Off button again and select your settings.
This 30-second automatic switch-off is a normal operating feature and does not indicate a fault.
If the controller repeatedly switches off after a heat setting has been selected, contact Customer Support.
Understanding the Automatic Shut-Off Timer
All EverCosy Electric Underblankets feature an adjustable automatic shut-off timer, allowing you to select a heating period between 1 and 9 hours.
When first switched on, the controller defaults to a 9-hour automatic shut-off setting.
How to change the timer
- Switch on the underblanket.
- Select your preferred heat setting.
- Press the Auto Off button until your preferred time is displayed.
- The heating function will automatically switch off when the selected period has elapsed.
For dual-controller models 600122 and 600123, each controller has its own timer, allowing each side to switch off independently.
Why has my underblanket switched off during use?
If the underblanket switches off after the selected timer period, this is normal operation.
For example, if the timer is set to 2 hours, the heating function will automatically switch off after that period.
If the underblanket switches off unexpectedly before the selected time:
- Check that the timer was set correctly.
- Check that the controller has not been covered or overheated.
- Inspect the blanket for folds, creases or visible damage.
If the appliance repeatedly switches off unexpectedly, stop using it and contact Customer Support.
Important: The automatic shut-off timer is a safety feature. It does not make prolonged use at high heat settings safe.
Controller or Display Not Working
If the controller display remains blank, the buttons do not respond or you cannot select a heat setting:
- Check that the mains socket is working.
- Switch off and unplug the appliance.
- Ensure the supplied controller is securely connected to the blanket.
- Inspect the controller, cable and connections for visible damage.
- Reconnect the power and press the On/Off button.
If the controller still does not respond, stop using the appliance and contact Customer Support.
Never attempt to dismantle, modify or repair the controller.
Uneven Heating or Cold Areas
If some areas of your underblanket feel warmer than others, check that it has been fitted correctly.
- Switch off and unplug the appliance.
- Ensure the blanket is lying flat on the mattress.
- Check that the elastic straps are securely fitted.
- Smooth out any folds, creases or bunching.
- Check that the blanket has not slipped out of position.
- Inspect the fabric for visible damage or signs of distorted heating wires.
On dual-controller models, different heat settings or timer periods can cause one side to feel warmer than the other.
The warmth may not feel identical across every part of the blanket, but the heating system should operate consistently.
If a significant section remains cold while other areas heat normally, or if any area becomes excessively hot, stop using the appliance and contact Customer Support.
Do not continue using an underblanket with suspected damaged heating elements.
Cleaning and Washing Your EverCosy Electric Underblanket
EverCosy Electric Underblankets can be hand washed or machine washed at a maximum temperature of 40°C, provided all controllers and mains cables have been disconnected beforehand.
Before washing
- Switch off the appliance and unplug it from the mains.
- Allow the underblanket to cool.
- Locate the controller connection.
- Raise the small flap on the connector slightly and gently pull the connectors apart.
- Remove the controller and mains cable completely.
For dual-controller models, disconnect both controllers and cables.
Never immerse a controller or mains cable in water.
How to machine wash your underblanket
- Disconnect all controllers and mains cables.
- Place the fabric underblanket in the washing machine.
- Use a mild detergent.
- Select a wool washing programme at a maximum of 40°C.
- Remove the blanket carefully after washing.
Ensure the washing machine has sufficient capacity to accommodate the blanket without tightly compressing it.
How to hand wash your underblanket
- Disconnect all controllers and mains cables.
- Fill a suitable container with warm water and mild detergent.
- Soak the blanket for approximately 5 minutes.
- Wash gently without twisting or wringing the fabric.
- Rinse thoroughly in clean water.
Important cleaning precautions:
- Never wash the controllers or mains cables.
- Do not bleach or dry clean the underblanket.
- Do not twist or wring the fabric.
- Never reconnect the controllers while the blanket is wet or damp.
- Never switch on the underblanket to speed up drying.
How to Dry Your Electric Underblanket
Correct drying is essential to protect the internal heating system.
- Gently reshape the underblanket after washing.
- Allow it to air dry on a clothes line.
- Avoid placing clothes pegs directly over areas containing heating wires.
- Allow the blanket and connectors to dry completely before reconnecting the controllers.
Never tumble dry, wring out or switch on the underblanket to speed up drying.
What should I check after washing?
Once the blanket is completely dry:
- Check that it has returned to approximately its original size.
- Inspect the fabric for visible heating wires.
- Hold the blanket up to a window to check for wires that appear twisted or looped.
- Check all connectors, controllers and cables for damage.
If heating wires are visible through the fabric, appear twisted or damaged, or the blanket has become distorted, do not use it.
Contact Customer Support for further advice.
How to Store Your EverCosy Electric Underblanket
Correct storage helps protect the internal heating elements and maintain the condition of your underblanket.
- Switch off the appliance and unplug it from the mains.
- Allow the blanket to cool completely.
- Fold it carefully without creating sharp creases.
- Store it in a clean, dry location, ideally in its original packaging.
- Avoid placing heavy objects on top of the folded blanket.
Before using the underblanket again, inspect the fabric, controller connections and power cables for signs of wear or damage.
Never switch on the blanket while it is folded or creased.
Important Safety Information
For safe operation of your EverCosy Electric Underblanket:
- Always fit the underblanket flat on top of the mattress, secured with the elastic straps and covered with a bedsheet or thin cotton-padded mattress cover.
- Never use the underblanket as a heated throw or wrap it around your body.
- Do not use it on an adjustable bed.
- Never switch it on while folded, creased, bunched up or wet.
- Do not tuck the heated section underneath the mattress.
- Never use a hot water bottle at the same time.
- Keep all controllers uncovered, accessible and away from other heat sources.
- Never place a controller or mains cable underneath the blanket.
- Do not insert pins or other sharp objects into the blanket.
- Do not use the appliance with an extension cable, external timer or separate remote-control system.
- Only use the controllers and cables supplied with the appliance.
- Do not use the underblanket if the fabric, heating wires, controllers or cables show signs of damage.
- Do not use it on anyone unable to recognise or respond to overheating.
- Children under three years old must not use the appliance.
- Children aged eight and over may use the appliance only with appropriate supervision or instruction and an understanding of the risks.
- Do not allow children to play with the appliance.
- Avoid prolonged exposure to higher heat settings, particularly while sleeping.
- Arrange all cables carefully to prevent entanglement, strangulation or tripping hazards.
The underblanket is intended for domestic household use only.
If the blanket becomes excessively hot, develops a burning smell, shows signs of damage or behaves unexpectedly, switch it off, unplug it and stop using it immediately.
Still Need Help With Your EverCosy Electric Underblanket?
If you've followed the relevant troubleshooting steps and your underblanket still isn't working as expected, contact Morphy Richards UK Customer Support.
Please include:
- Model and serial numbers: Both can be found on the product packaging.
- Proof of purchase: Showing the purchase date, product purchased and retailer.
- Description of the issue: For example, insufficient warmth, not heating, unexpected shut-off, uneven heating or controller problems.
- Heat and timer settings used: Confirm which settings you've tried and whether the issue occurs consistently.
- Affected heating area: For dual-controller models, confirm whether the problem affects one side or both.
- Troubleshooting completed: Let us know which checks you've already carried out.
Our Customer Support team will review the information and advise on the next steps.