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How to Replace the Thermostat on an Electric Cooker - Diplomat

The thermostat controls the temperature in the oven and a sign of a faulty thermostat is if your cooker no longer reaches the correct temperature and the temperature light is going out. You should consider replacing the thermostat if:

  • The temperature is getting too hot.
  • The temperature is not getting hot enough.
  • If the oven does not heat at all it could be due to a faulty element, you can see our other advice articles on how to replace a fan oven element here.

Not that they should follow a more complicated process - the video and guide below are reference to a Diplomat ADP series oven, however don’t worry if your oven is a different brand as the process should be very similar to other manufacturers cookers.

This video shows an example on how to remove or replace the part on a typical machine, some models may be different but the procedure should be similar.

What You Will Need:

Step 1 - Safety Advice

Safety First! Please make sure that you have disconnected the appliance from the mains before beginning any repair.

Caution: Due to the sharp edges exposed we suggest suitable Safety Gloves are worn to help prevent injury when carrying out this repair.

If you have built in oven then to begin you will need to remove it from the cavity - however before you do this removing the door and shelves from the appliance will make it easier to handle and work on.

Step 2 - Remove the Door

The door is held in place with some clasps, these lift up - once locked in place the door will effortlessly come away from the oven. With the door removed, take out the shelves this will allow you to access the back on the oven with ease and stop tem getting in the way.

Step 3 - Taking the Oven Out

With the door removed and the shelves taken out you can now remove the oven from the cavity. Note: Some ovens are secured with screws if this applies to your appliance then ensure you remove the screws before pulling the oven out.

When lifting the oven be careful as you do not want the flex to come off the back of the oven, once out slowly place it on the floor.

Step 4 

With the oven sitting comfortably on the floor - you will need to remove the top and back panel. To remove these you’ll need a particular screwdriver, in the video the panels are held in place with torx screws - therefore just check which type of screwdriver you’ll need.

With the panels removed you will now be able to see the old thermostat and capillary tube - following the wire will lead you to where the capillary is located and clipped in place inside the cavity.

Step 5 

Now that you have located the capillary you can unclip it, this can be done using a pair of pliers. Unclipped you can feed that out through the hole. The wire may be tangled in with the other wires - if so untangle this.

Now to remove the thermostat - located behind the control panel, you will need to first remove the control knobs. With this done you can remove the fascia panel - with this removed you should be able to find the faulty thermostat which will be held in place with 2 screws - unscrew these.

Step 6 

Once the screws are removed - you’ll need to release the thermostat from the wires which hold keep it connected to the oven. It is recommended to take a photo of the wire placement to help when connecting the new thermostat. Once disconnected - connect the new thermostat and reattach the thermostat back onto the control panel and fit the fascia back in place. Don’t forget to refit the control knobs back onto the spindles.

Step 7 

For neatness when feeding the capillary to the back on the oven wrap the loose wire around the other cables to keep it tucked away and looking neat. However ensure you have enough cable to allow the capillary to feed into the back and clipped in place.

Step 8 

With the thermostat and capillary in place you can now reattach the back and front panel.  With the panels secured you can lift up the oven and carefully move it back into the cavity. Once in place and secure, you can now reinsert the shelves and fit the door back (don’t forget however to put the clasps down to lock the door in place).

Congratulations you have successfully replaced a faulty thermostat on your electric cooker. Fixing your oven thermostat yourself can save you money compared to booking a repair or buying a new cooker.This replacement is one of many easy do it yourself repairs we have within ou  advice article. For any other cooker and hob spares don’t forget to check out our online catalogue for a whole host of spares.

Now you can add oven thermostat replacement to your DIY repertoire. If you need any other help for your appliances you can find more videos from Mat and the team at eSpares, who are always on hand with appliance repair advice in your time of need.


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