Electrolux Frost free – ER2866BN – Fridge warm after 1 month

[walnut]

I’am trying to cure the above frost free fridge freezer.
Mod – ER2866BN
Prod – 928405604
After a manual defrost the fridge works for about 1 month then goes warm.
The evaporator is like a block of ice all over.
I have put the fridge into service mode, no faults are detected in the thermocouples.
The heaters, comp and fans all test ok.
I measured the resistance of the 2 thermocouples, evap = 6k ohms,
in air = 5.5k ohms, this was after a manual defrost so the values seem right.
I have ordered new set of probes but was wondering if anyone knows of a common fault on this model?

PS – I have shorted out the evap thermocouple to force the PCB to do a timed defrost cycle.
Lets see if it will keeps the beers cold till the Cup final.

[Dave_Conway]

Re: Electrolux Frost free – ER2866BN – Fridge warm after 1 m

I think the thermistors you’ve ordered will resolve it by the looks of this:

Lux wrote:NTC temperature sensors with a defect in the calibration (wrong resistance values) have been used for the
production of the Eurocombi appliances (Fuenmayor-Spain factory) with PNC 928405xxx from serial no.
307xxxxxx to 335xxxxxx.
The indicated NTC sensors were not faulty initially, but a defect in the isolation caused a wrong calibration after
some or many defrosting cycles.

Thermistor values:

°C……Ohm
10…..5348 ±0.6
5…….6818 ±0.4
0…….8758 ±0.4
-5……11337 ±0.4
-10….14795 ±0.6
-15….19475 ±0.7
-20….25862 ±0.8
-25….34666 ±0.9
-30….46921 ±1
-35….64161 ±1
-40….88577 ±1

Dave.

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