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Repair and disassembly guides for food cooling appliances including refrigerators, freezers and fridge-freezers.

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Hotpoint NCD191 fridge freezing at back but not cooling

Hi, I have a Hotpoint NCD191 fridge which is running continuously and frosting up at the back, however it is not getting below 10 degrees centigrade (50f). I have cleaned the coils and changed the thermostat and checked the door seals. The fridge does not cut out when the thermostat is frosted up! I assume it is a defrost timer or heater issue but can not find one. The fridge is a sealed unit at the rear with the evaporator coils covoured by insulation. There is no circuit board or PCB si I assume there must be a defrost circuit. Is anyone able to advise where this is likely to be and how to fix it.

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All refrigeration units are sealed (brazed connections, high temperature soldering using brass on copper tubing) at factory assembly with zero diy repairs unless trained in refrigeration diagnosis, troubleshooting and repairs. As sealed units, the refrigeration system is designed for at least 10 years of trouble free service. Beyond ten years, wear and tear can occur with the possibility of refrigerant leaking out rendering the sealed unit unable to create cold operation. Trained refrigeration techs can determine if the sealed unit failed. As a diyer, the condenser coils should be hot to the touch near the compressor while the refrigerator should be cold with varying temperature adjustment between 40F-50F.

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Sorry, by sealed unit I meant that other than the compressor, the parts such as the condensor coils can not be seen as they are sealed in an insulated casing

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I did not misunderstand your descriptions. The evaporator coils are inside to create cold, condenser coils outside to vent heated refrigerant away whether using a fan or convection airflow.

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Hi,

I don't know the model but looking at the parts for it, it seems as though it has an evaporator fan (example only) or at least that's how it's described so it is not a condenser fan near the compressor.

Check if you can hear if it is running. Normally evap fans run as long as the compressor is running and the door(s) are shut. Opening a door will stop the fan and it will start again when the door is shut. The fan blows the air across the evaporator to cool things down to the set temp.

If you can't hear it then the fan may be faulty or iced up i.e. defrost problem or it may be a door switch problem. Check if the light in the fridge turns off/on when you manually operate the switch with the door open (This is assuming that the switch is located in the door jamb somewhere and is visible).

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