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Archive for the ‘Refrigerator thermostat – replacing’ Category

The thermostat is essentially a switch that turns the refrigerator motor on when cooling is required and off when the temperature has lowered to the required level. This is achieved with a thermally sensitive capillary (which looks like a silver wire) coming from the thermostat body and passing to a point in the fridge cabinet where it can monitor the temperature inside.
If a thermostat is faulty it will show one of the following symptoms:
1) The thermostat does not switch on, the light inside (if fitted and the bulb has not failed) will light up but the motor will not try to start.
2) The fridge will not switch off, the motor runs continuously and everything is freezing solid inside.
3) The fridge works correctly but after it reaches temperature and cuts off it does not restart or it gets too warm before it restarts.
However, if the fridge does not start to cool and the motor is very hot or a faint click can be heard approximately twice every minute, this may indicate the fridge thermostat is trying to start but the compressor may be faulty.

To replace the fridge thermostat. First turn the refrigerator off and unplug it.

Locate and remove the temperature adjustment knob and unscrew the nut holding the thermostat in position.
Then, if the thermostat is in an assembly inside the fridge, remove the screws holding this to the fridge wall. Please note that many have a hidden fixing that will hold this cover in place. Once all screws are removed, try moving the assembly slightly forward or backwards to release and lift it off.
Turn the cover over and remove any cover inside to access and disconnect the thermostat. It’s a good idea to take a photo of the wiring before disconnecting, so you have a reference when fitting the replacement thermostat.
Follow the capillary from the thermostat body – if it runs to a cold plate or evaporator ensure that the fixing holding it in place is released. If it runs into a tube in the lining, gently pull the thermostat away from the fridge, which will draw this capillary out.
To refit the new thermostat, start by placing the capillary back into the tube in the lining or reattaching to the evaporator in its original place. Reconnect the wiring, referring to the photo previously taken to ensure the correct connections.
Refit the locating nut and knob and ensure all cables are pushed into their correct position in the cover. Finally, locate the cover onto any hidden fixings and screw into place, now the fridge should be ready to reconnect and test.

It will look something like this when you buy one.

thermostat

 

 

 

 

 

 

 

 

 

 

 

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