Hi, for the last couple of days the freezer temperature has been reading as high as -10C, even though it's set to operate at -16C. It "beeps" to indicate that the temperature is too high. The unit was bought in July last year so I'm not too sure where to start. Also, there is no sound coming from the unit at all, all I can hear is a faint "crackling" - almost as if there is ice cracking, whenever I open the doors. The fan never seems to switch on.
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While it could be the main control board, I would check for a defrost circuit failure first. If you take off the read shield of the freezer you will be able to see the evaporator coils. If that is a block of ice, then your defrost circuit is not doing its job and the ice is causing the thermostats to read the incorrect temperature. The good news is that once you defrost the unit, you will have 2-3 weeks before the ice builds up enough to be a problem again. Which give you time to troubleshoot and order the replacement parts.
Sherree, do this simple check open your freezer door and feel the back panel in your freezer section. If you feel frost on it then a repair is required of the possible of 3 items that could have failed defrost heater, defrost bi-metal thermostat, or defrost controller and is going to require disassembly of the freezer panel and electrical checks as well as the defrost controller. but if it can wait until monday then a serviceman can diagnoise the problem and repair it.
The same symptom occurred in our fridge freezer. The fridge compartment warmed up whilst the freezer compartment continued to keep temperature.
The cause of our problem was diagnosed as a frozen sensor that controls a flap, that controls the flow of cold air from the freezer compartment up into the fridge compartment. We were advised to power off the fridge freezer (removing all food and trays from the freezer unit first), and to leave it to defrost for 24hrs. We needed to place a few towels on the floor of the freezer compartment to soak up the melt water. After 24hrs we followed the power up instructions in the manual (versions are available online if you have lost yours). Within a few minutes it was obvious that the fridge compartment was being cooled – Problem solved :)
The defrost cycle is not happening like it should, that's what causes the block of ice (and poor air flow). If you have all that defrosted look at the defrost bi-metal, it usually is a small round disk with a couple wires coming out of it and it's clipped on the coils. When it's cold enough, it passes electricity to the heat elements, when it gets hot enough it "opens" and kills power to the heat elements. If that is bad (swollen cracked or bloated) and not passing electricity to the elements that's the problem. Another item would be the defrost timer itself, if it doesn't work (no clock motor turning) then it will never go into defrost. And the last and usually least expected failure would be the heat element themselves not working