[Mark Flint]

electrofix wrote:but your first statement said the fridge act like a freezer. the very fact it has the power to freeze everything means there cant be a problem with the compressor as its not only getting to the temperature it should switch off its exceeding it

Dave

Yes, sorry for the confusion, I went off script for a minute there because I thought I could see a GENERL dilemma for diagnosing problems with thermistor/thermostat which are PCB and not phial type as the PCBs are practically impossible to test and rule out.

[Mark Flint]

kwatt wrote:So if the compressor runs continuously about the only explanation there is would be a faulty sensor normally, more so as you have eliminated the possibility of the board by replacing it.

K.

Is there another case where the compressor runs continuously because it’s low in refrigerant and is working hard all the time but never getting down to the requested temperature? If so how would it be possible to tell if 1) this is the fault, or 2) it’s a faulty sensor, or 3) it’s a faulty board that switches the relay?

[Mark Flint]

kwatt wrote:That is indicative of a sensor (thermistor) failure if it over freezes.

K.

Please see reply above. Thank you.

[Mark Flint]

electrofix wrote: the relay is only a start device
the board and sensors control temperature

Dave

Hi Dave,
I have replaced the fridge thermostat (PCB variety, not phial), and replaced the “control board”, and still the fridge section freezes over within a couple of days. The control board looks more like a buck converter and has no ICs that look like working with time functions, but I replaced it anyway. The thermal fuse for the defrost heater element had blown so I replaced that. The heating element and thermostat (defrost) was fine. As it is freezing over rather quickly I doubt it has anything to do with the defrost system. At a loss for what to try next.
Regards, Mark

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