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Thank – you LanciaMad. Three sensors isn’t really mad. They all serve a purpose. Look at cars, they have even more sensors on them. Although it is more to go wrong, it makes the product ( either car or Fridge / Freezer far more efficient and controllable. Although a wiring diagram probably wouldn’t help me too much, it certainly be of benefit.
Re – Beko Fridge Freezer. Does the wiring generally terminate elsewhere.within the foam at the rear of the unit, between the Control board and the Thermistors? I am getting very odd readings from the control board wiring, which do not change when the connections within the freezer section are disconnected.
I have experienced similar issues on a different Beko Fridge / Freezer. On my model concerned, there are THREE sensors on it. The sensor buried into the rear of the unit, below, and to the right of the control board, is a control sensor. Beko’s name for it, I’m not too sure. It compares the temperature measured, with the set temperature on the control within the fridge. If they differ, the compressor will fire up, increasing the refrigeration. There are TWO further sensors within the Freezer on my model. I think that these are an evaporator sensor, and a defrost sensor. The defrost sensor tells the control board when to activate a defrost cycle. ( When it gets too frosted up ) The other one monitors the temperature of the refrigerant within the freezer, also controlling the compressor / freezer fan. ( I think ). The sensors are thermistors. they Should have a resistance across the when measured with a meter. They ARE NTC, or negative temperature coefficient types, which means their output in millivolts INCREASES, as the temperature DECREASES. It is NOT a good idea to place additional resistors into the circuit, to compensate for a low or wrong reading on a thermistor. This will merely cause the thermistor to send an incorrect reading to the control board ( or none at all ). The Fridge / Freezer WILL NOT operate correctly. Beko have offered little or no help on the matter. I’d be interested to know where you obtained the drawing of you model from please, if you can offer some help.
