Morphy Richards HeatFlux Digital Oil-Filled Radiators – How to Use, Heating Issues & Troubleshooting

The Morphy Richards HeatFlux Digital Oil-Filled Radiator range provides adjustable, thermostatically controlled heating for your home.

Available in 1.5kW, 2kW and 2.5kW models, these radiators feature three power settings, an energy-saving Eco mode, a 24-hour timer, digital touch controls and a remote control.

This guide explains how to set up and use your HeatFlux radiator, resolve common heating and controller problems, understand normal operating sounds and safely maintain your appliance.

Which HeatFlux Oil-Filled Radiators Does This Guide Cover?

This guide applies to the following Morphy Richards models:

• 827501 and 827502 – HeatFlux 1.5kW Digital Oil-Filled Radiators (7 heating fins).
• 827751 and 827752 – HeatFlux 2kW Digital Oil-Filled Radiators (9 heating fins).
• 827876 and 827877 – HeatFlux 2.5kW Digital Oil-Filled Radiators (11 heating fins).

The models vary in heating output, size and colour, but share the same general operating controls, heating modes and safety features.

All six models include:

• Low, Medium and High power settings.
• Eco mode with automatic temperature regulation.
• Adjustable digital thermostat.
• Automatic On and Off timer, adjustable from 1 to 24 hours.
• Remote control.
• Child lock and silent mode.
• Tip-over and overheat protection.

Where to find your model and serial numbers: Check the appliance's rating label.

Quick Troubleshooting – Find Your Issue

Radiator not heating or producing enough warmth? Select High power, increase the thermostat temperature and allow time for the radiator to warm up. See Radiator Not Heating Enough.

Radiator not switching on? Check the mains socket, plug fuse and standby controls. See Radiator Not Switching On.

Radiator switching on and off by itself? The thermostat automatically cycles the heating on and off to maintain the selected room temperature. See Why Does My Radiator Keep Switching On and Off?

Radiator making clicking, popping or crackling noises? These sounds are normally caused by the expansion of the thermal fluid as the radiator heats. See Radiator Making Noises.

Radiator switching off unexpectedly? Check the timer, thermostat, tip-over protection and possible overheating. See Radiator Cutting Out or Switching Off Unexpectedly.

Remote control not working? Check the CR2025 battery, distance and direction of the remote. See Remote Control Not Working.

Buttons not responding? The child lock may be activated. See Child Lock – Controls Not Responding.

Radiator producing a burning smell? A temporary odour can occur during first use, but persistent burning smells require investigation. See Radiator Producing a Burning Smell.

Radiator tripping the electrics? Stop using it if the problem repeats. See Radiator Tripping the Electrics.

Before First Use – How to Assemble Your HeatFlux Radiator

The HeatFlux radiator must be correctly assembled before being connected to the mains supply.

Attaching the wheels

1. Remove all packaging and ensure the radiator is unplugged.
2. Carefully turn the radiator upside down on a suitable protective surface.
3. Position the rear wheel assembly onto the fixed U-bolt.
4. Secure the rear wheel assembly using the two supplied wing nuts, tightening them firmly.
5. Attach the front wheel assembly to the bottom of the front panel using the two supplied screws.
6. Return the radiator to its normal upright position.
7. Check that both wheel assemblies are secure and the radiator stands firmly without rocking.

Use the integrated handle when moving the radiator.

Important: The radiator must only be operated upright with both wheel assemblies correctly attached. Never operate it upside down, on its side or without its wheels.

Where should I position my radiator?

Place the radiator on a firm, flat, stable and level floor.

• Keep curtains, textiles and other flammable materials at least 1 metre away.
• Ensure the radiator is not covered or obstructed.
• Keep the air inlet and outlet clear.
• Do not position the radiator where it could be knocked over.
• Keep the mains cable away from hot surfaces and walkways.
• Plug the radiator directly into a suitable mains socket.

Never use the radiator with an extension cable or external timer.

How to Switch On and Use Your HeatFlux Radiator

1. Ensure the radiator is correctly assembled and positioned upright.
2. Plug the appliance into a suitable mains socket.
3. The Standby and Timer buttons will illuminate, indicating that the radiator is in standby mode.
4. Press the Standby button to activate the radiator.
5. Press the Mode button to select your preferred heating mode.
6. Adjust the thermostat temperature using the Temperature button and the + or – controls.

The radiator will begin heating according to the selected settings.

A beep will normally sound when a button is pressed. This can be disabled using Silent Mode.

How do I switch the radiator off?

Press the Standby button until sleep mode is selected and the control panel display switches off.

When the radiator is no longer required, unplug it from the mains supply.

Allow it to cool before moving, cleaning or storing it.

Understanding the Heating Modes

The HeatFlux radiator has four operating modes:

• Eco Mode: Automatically adjusts the power level as the room approaches the selected temperature.
• High Power: Provides the highest available heating output for the model.
• Medium Power: Provides a reduced heating output.
• Low Power: Provides the lowest heating output.

Press the Mode button to cycle through Eco, High, Medium and Low.

Which heating mode should I use?

High Power: Suitable when you want to increase the room temperature more quickly.

Medium Power: Suitable for moderate heating requirements.

Low Power: Suitable when less heat is required or the radiator will be used over an extended period.

Eco Mode: Suitable for maintaining a comfortable room temperature while automatically adjusting the heating output.

Higher power settings can warm a room more quickly but consume more electricity while actively heating.

What is Eco Mode and how does it work?

Eco Mode automatically adjusts the radiator's heating power as the room temperature approaches the selected thermostat temperature.

To use Eco Mode:

1. Switch on the radiator.
2. Press the Mode button until ECO illuminates on the display.
3. Select your preferred room temperature using the Temperature button and + or – controls.

If no temperature is selected, Eco Mode defaults to 23°C.

As the room approaches the selected temperature, the radiator automatically adjusts its power output.

This means the radiator may reduce its heating intensity rather than continuing at maximum power.

Important: A radiator operating at reduced power in Eco Mode is not necessarily faulty. This is part of its normal temperature regulation.

How to Set the Thermostat Temperature

The digital thermostat allows the radiator to maintain your preferred room temperature.

1. Switch on the radiator.
2. Press the Mode button to select your preferred heating mode.
3. Press the Temperature button. The temperature setting will flash on the display.
4. Use the + or – buttons to select your desired temperature.
5. Wait until the display stops flashing to confirm the setting.

When the room reaches the selected temperature, the radiator automatically cycles its heating on and off to maintain it.

Why does my radiator stop heating before the room feels warm?

The radiator regulates heating according to its thermostat.

If the temperature detected by the appliance has reached the selected temperature, the heating may switch off even if other areas of the room still feel cooler.

Try the following:

1. Check the selected thermostat temperature.
2. Increase the temperature if more warmth is required.
3. Select High Power if you want the room to heat more quickly.
4. Ensure the radiator has sufficient space around it for heat to circulate.
5. Check that doors, windows or draughts are not causing excessive heat loss.

The temperature measured near the radiator may differ from the temperature elsewhere in the room.

Why Does My Radiator Keep Switching On and Off?

If your HeatFlux radiator heats up, stops heating and then starts again, this is usually normal thermostat operation.

When the selected room temperature is reached, the radiator automatically stops heating. It resumes heating when required to maintain that temperature.

This behaviour helps regulate room temperature and electricity consumption.

How can I tell whether this is normal?

Normal operation:

• The radiator heats when the room is below the selected temperature.
• Heating reduces or stops when the selected temperature is reached.
• Heating resumes automatically when required.
• Eco Mode adjusts the heating power as the room approaches the set temperature.

Possible fault:

• The radiator repeatedly shuts down shortly after starting, despite the room being cold.
• The display or controls stop responding unexpectedly.
• The radiator repeatedly activates its overheat protection.
• Heating stops regardless of the selected temperature or mode.

If the radiator is behaving unexpectedly, check the timer and safety protection sections below.

Why Isn't My Radiator Heating Enough?

If your HeatFlux radiator isn't producing enough warmth or is taking longer than expected to heat the room, this does not necessarily indicate a fault.

Oil-filled radiators work by heating the thermal fluid inside the appliance. The heat is then transferred through the metal fins into the surrounding room.

Unlike a fan heater, an oil-filled radiator does not blow hot air directly into the room.

What should I check?

1. Select High Power. This provides the highest available heating output.
2. Increase the thermostat temperature. Ensure the selected temperature is above the current room temperature.
3. Allow time for heating. The radiator and surrounding room will take time to warm.
4. Check Eco Mode. If Eco Mode is selected, the appliance may automatically reduce its power as the room approaches the set temperature.
5. Check the room size. Larger rooms or poorly insulated spaces may take longer to heat.
6. Check the radiator's position. Keep the surrounding area clear to allow heat to circulate.
7. Check for heat loss. Open doors, windows and draughts can reduce heating effectiveness.

Does a higher wattage radiator produce more heat?

Yes. The HeatFlux range includes three different maximum heating outputs:

• 1.5kW models: 1500 watts.
• 2kW models: 2000 watts.
• 2.5kW models: 2500 watts.

Higher wattage models provide greater maximum heating output, which may be more suitable for larger spaces.

However, heating performance also depends on room size, insulation, external temperature and the selected operating mode.

Should all the radiator fins become hot?

The radiator transfers heat through its metal fins, but the temperature may not feel identical across every surface or at every stage of heating.

Temperature differences can occur as the radiator warms and the thermostat regulates its output.

If the radiator produces no noticeable heat on High Power with the thermostat set above room temperature, further investigation may be required.

Safety warning: Never touch the hot fins with bare skin to test their temperature. The surfaces can become hot enough to cause burns.

Radiator Not Switching On

If the radiator does not power on or the display remains blank:

1. Check that the mains plug is securely connected.
2. Test the socket using another electrical appliance.
3. Check whether the Standby and Timer buttons illuminate when connected to power.
4. Press the Standby button to activate the appliance.
5. Check whether the child lock has been activated.
6. If the plug fuse requires replacement, use a fuse of the same rating as originally fitted.

If the radiator remains completely unresponsive after these checks, stop using it and contact Morphy Richards Customer Support.

Never attempt to dismantle or repair the electrical components yourself.

How to Use the 24-Hour Timer

The HeatFlux radiator has two timer functions:

• Auto On: Switches the radiator on automatically after a selected delay.
• Auto Off: Switches the radiator off automatically after a selected operating period.

Both functions can be set between 1 and 24 hours.

The timer operates as a countdown from the time it is set, rather than at a specific clock time.

How to set Auto On

Use Auto On when you want the radiator to switch on after a selected period.

1. With the radiator in standby, press the Timer button.
2. The hour digits will flash.
3. Use the + or – buttons to select a delay between 1 and 24 hours.
4. Wait until the hour digits stop flashing to confirm the setting.
5. The countdown will appear on the display.

The radiator will automatically switch on when the selected delay has elapsed.

For example, selecting 3 hours means the radiator will switch on approximately 3 hours after the timer is set.

How to set Auto Off

Use Auto Off when you want the radiator to stop heating after a selected period.

1. Switch on the radiator and select your preferred heating settings.
2. Press the Timer button.
3. The hour digits will flash.
4. Use the + or – buttons to select an operating period between 1 and 24 hours.
5. Wait until the hour digits stop flashing to confirm the setting.

The countdown time and selected temperature will appear alternately on the display.

The radiator will automatically switch off when the selected time has elapsed.

Why does my radiator switch on or off unexpectedly?

Check whether an Auto On or Auto Off timer has been activated.

If the radiator switches on after a delay, the Auto On timer may be operating.

If it switches off after a period of heating, the Auto Off timer may have reached the end of its countdown.

Important: Timer operation does not remove the need to follow the radiator's safety precautions. Ensure the appliance is correctly positioned and clear of combustible materials before using automatic operation.

Child Lock – Why Aren't My Controls Responding?

The HeatFlux radiator includes a child lock to prevent accidental changes to the controls.

How to activate the child lock

Press and hold the Standby and Mode buttons together for 3 seconds.

A beep will sound to confirm activation.

How to deactivate the child lock

Press and hold the Standby and Mode buttons together for 3 seconds again.

A beep will sound to confirm deactivation.

If the control panel appears unresponsive, check whether the child lock has been activated before assuming there is a fault.

How to Turn Off the Button Beeping – Silent Mode

The radiator normally produces a beep when a button is pressed.

If you prefer to operate it without these sounds, you can activate Silent Mode.

1. Press and hold the + and – buttons together for 3 seconds.
2. The button confirmation sounds will be disabled.
3. To restore the sounds, press and hold the + and – buttons together for 3 seconds again.

Silent Mode only disables the button confirmation sounds. It does not prevent normal heating-related clicking or popping noises.

Remote Control Not Working

All HeatFlux Digital Oil-Filled Radiators in this range include a remote control.

The remote uses one CR2025 3V lithium coin-cell battery.

What should I check?

1. Check the battery. Ensure a CR2025 battery is fitted correctly.
2. Check the battery polarity. The positive and negative sides must match the markings in the battery compartment.
3. Move closer to the radiator. The remote may not operate if it is too far away.
4. Aim towards the control panel. Ensure there are no obstructions between the remote and radiator.
5. Replace the battery if required. Use a new CR2025 battery.
6. Test the radiator's touch controls. If the radiator works using its control panel but not the remote, the issue may be isolated to the remote control.

How do I replace the remote battery?

1. Open the battery compartment at the bottom of the remote control.
2. Remove the existing battery.
3. Insert a new CR2025 3V battery, observing the correct polarity.
4. Securely refit the battery cover.

Battery safety warning: Keep coin-cell batteries and the remote control out of reach of children. Swallowing a coin-cell battery can cause severe internal burns and may be fatal. Seek immediate emergency medical attention if a battery is swallowed or suspected to have been swallowed.

Do not leave loose or used batteries accessible to children.

Can I purchase a replacement remote control?

The replacement remote control is identified as spare part 33034.

Radiator Making Clicking, Popping or Crackling Noises

It is normal for oil-filled radiators to make some clicking, popping or crackling sounds as they heat up.

These noises are generally caused by the expansion of the thermal fluid and components inside the radiator as their temperature changes.

You may notice the sounds:

• When the radiator first starts heating.
• As the radiator reaches its operating temperature.
• When the thermostat cycles the heating on or off.
• As the appliance cools down.

Occasional clicking, popping or crackling during heating is normal and does not necessarily indicate a fault.

What if the noise is unusually loud or persistent?

1. Check that the radiator is standing upright on a firm, level surface.
2. Ensure both wheel assemblies are securely attached.
3. Check that nothing is obstructing the air inlet or outlet.
4. Make sure the radiator is not touching furniture or other objects.

If the radiator develops unusually loud noises, vibration, signs of damage or a change in performance, switch it off and contact Customer Support.

Radiator Producing a Burning Smell

A temporary odour may occur when a new radiator is used for the first time.

This can be normal and should gradually disappear with use.

What should I check?

1. Ensure all packaging materials have been removed.
2. Check that curtains, textiles and other flammable materials are at least 1 metre away.
3. Make sure the radiator is not covered or obstructed.
4. Check that the air inlet and outlet are clear.
5. Inspect the plug and cable for visible signs of damage.

When should I stop using the radiator?

Switch off and unplug the radiator immediately if:

• The smell is strong, persistent or worsening.
• Smoke is visible.
• There are signs of scorching, melting or discolouration.
• The plug or cable appears damaged or unusually hot.
• The radiator is leaking oil.

A persistent burning smell should not be treated as normal first-use behaviour.

Do not continue using the appliance until the issue has been assessed.

Radiator Cutting Out or Switching Off Unexpectedly

If your radiator stops heating unexpectedly, the cause may be normal thermostat operation, a timer setting or a safety protection feature.

Check the following

1. Thermostat operation

If the selected room temperature has been reached, the radiator will automatically stop heating and restart when required.

2. Auto Off timer

If the timer has reached the end of its selected countdown, the radiator will switch off automatically.

3. Tip-over protection

If the radiator has fallen over or is tilted excessively, the safety switch will stop operation.

4. Overheat protection

If the radiator becomes excessively hot, the overheat protection system may switch it off.

If the radiator repeatedly shuts down unexpectedly, follow the relevant safety checks below.

Tip-Over Protection – Radiator Stops When Moved or Tilted

The HeatFlux radiator has a built-in tip-over safety switch.

This automatically switches off the heating if the radiator falls over or is positioned at an excessive angle.

The radiator is designed to resume operation when returned to its correct upright position.

What should I do?

1. If the radiator has fallen over, switch it off and unplug it.
2. Allow it to cool.
3. Inspect the appliance, wheels, cable and plug for damage.
4. Ensure both wheel assemblies are correctly attached.
5. Position the radiator upright on a firm, level surface.

If the radiator has been dropped or shows signs of damage, do not use it.

If the radiator is undamaged but repeatedly activates the tip-over protection while standing upright on a level floor, contact Customer Support.

Important: Never bypass or interfere with the tip-over safety mechanism.

Overheat Protection – Radiator Switching Off Due to Excessive Heat

The HeatFlux radiator includes an automatic overheat protection system.

If severe overheating occurs, the protection system switches off the appliance to help prevent damage or injury.

What should I do if the radiator overheats?

1. Switch off and unplug the radiator.
2. Allow it to cool for approximately 30 minutes.
3. Check that nothing is covering or obstructing the appliance.
4. Ensure curtains, textiles and other flammable materials are at least 1 metre away.
5. Check the air inlet and outlet for obstructions.
6. Inspect the radiator, plug and power cable for visible damage.

If there is no damage and the cause of overheating has been removed, reconnect the radiator and operate it normally.

What if it keeps overheating?

If the overheat protection repeatedly activates, stop using the appliance and contact Customer Support.

Do not repeatedly restart a radiator that is overheating or attempt to bypass its safety protection.

Radiator Tripping the Electrics

If your radiator trips a circuit breaker or RCD, it may indicate an electrical supply issue, an overloaded circuit or a fault with the appliance.

What should I check?

1. Switch off and unplug the radiator.
2. Check whether other high-power appliances were operating on the same circuit.
3. Inspect the radiator's plug and cable for visible damage.
4. Ensure the appliance has not been exposed to water or moisture.
5. Check whether the electrical circuit is suitable for the radiator's power rating.

The 1.5kW, 2kW and 2.5kW models have different electrical demands.

Do not use the radiator with an extension cable or multi-plug adaptor.

If the radiator repeatedly trips the electrics, stop using it. Do not repeatedly reset the circuit breaker or continue testing the appliance.

Contact Customer Support and, where necessary, a qualified electrician.

Oil Leaking From the Radiator

HeatFlux radiators contain a precise quantity of specialised thermal oil within a sealed heating system.

Under normal operation, the radiator should not leak oil.

What should I do if I notice an oil leak?

1. Switch off and unplug the radiator immediately, provided it is safe to do so.
2. Allow the appliance to cool.
3. Do not attempt to open, drain, refill or repair the radiator.
4. Keep children and pets away from any leaked oil.
5. Contact Morphy Richards Customer Support for further advice.

Repairs requiring the oil container to be opened must only be carried out by the manufacturer or an authorised service agent.

Never continue using a radiator that is leaking oil.

How to Clean Your HeatFlux Radiator

Regular cleaning helps prevent dust build-up and maintain efficient operation.

1. Switch off the radiator and unplug it from the mains.
2. Allow the appliance to cool completely.
3. Wipe the heating fins and control panel using a soft, damp, lint-free cloth.
4. If dust has collected in the ventilation openings, carefully remove it using a vacuum cleaner.
5. Allow the appliance to dry before reconnecting it to the mains.

Cleaning precautions

• Never immerse the radiator in water.
• Do not spray water or cleaning products directly onto the appliance.
• Do not use harsh detergents, chemical cleaners or solvents.
• Do not insert objects into the ventilation openings.
• Never clean the radiator while it is switched on or hot.

How to Store Your HeatFlux Radiator

When the radiator is not required for an extended period:

1. Switch it off and unplug it.
2. Allow it to cool completely.
3. Clean the appliance and remove accumulated dust.
4. Store it in a clean, dry location, ideally in its original packaging.
5. Keep it away from moisture and out of reach of children.

If removing the wheel assemblies for storage, ensure they are correctly refitted before the radiator is used again.

Do not wrap the mains cable tightly around the hot radiator body.

Important Safety Information

For safe operation of your HeatFlux Digital Oil-Filled Radiator:

• Never cover the radiator. Covering the appliance can cause overheating and create a fire risk.
• Keep curtains, textiles and other flammable materials at least 1 metre away.
• Only operate the radiator upright, with both wheel assemblies correctly fitted.
• Always position it on a firm, flat and stable surface.
• Never use the radiator without its wheels or while lying on its side.
• Do not use it if it has been dropped or shows signs of damage.
• Do not use the radiator near water or in locations where it may become wet.
• Never touch the hot heating fins with bare skin, as they can cause burns.
• Do not use an extension cable, external timer or separate remote-control system.
• Plug the appliance directly into a suitable earthed mains socket.
• Keep the power cable away from hot surfaces and avoid creating trip hazards.
• Do not allow children to play with the appliance.
• Keep young children away from hot surfaces.
• Do not use the radiator in a small room occupied by someone unable to leave independently unless constant supervision is provided.
• Never attempt to dismantle, modify, refill or repair the radiator.
• Unplug the appliance when not in use, before cleaning and before moving it.

Important: The radiator's timer, child lock, tip-over protection and overheat protection are additional safety features. They do not replace correct positioning, supervision or safe operation.

If the radiator overheats, leaks oil, produces smoke, develops a persistent burning smell or shows signs of electrical damage, stop using it immediately.

Still Need Help With Your HeatFlux Oil-Filled Radiator?

If you've followed the relevant troubleshooting steps and your radiator still isn't working as expected, contact Morphy Richards UK Customer Support.

Please include:

• Model and serial numbers: Both can be found on the appliance's rating label.
• Proof of purchase: Showing the purchase date, product purchased and retailer.
• Description of the issue: For example, insufficient heat, unexpected shut-off, unusual noises, controller problems or electrical issues.
• Heating settings used: Confirm the selected power mode, thermostat temperature and whether a timer was active.
• Troubleshooting completed: Let us know which checks you've already carried out.

For intermittent heating or controller issues, a short video showing the display and the problem may also help our team investigate.

Our Customer Support team will review the information and advise on the next steps.