daewoo FRS-U201A1 keeps blocking duct with ice

[daewoo mental arghh]

hi

I’m hoping this will be an easy diagnosis for someone.

compressor runs ok , fan in freezer section runs ok ,BUT after a couple of days freezer section starts to thaw at top of compartment and fridge side is warming up .

removal of the rear panel in freezer section , reveals coils frosted up (not ice packed , looks ok to me) apart from the duct behind the evaporator about 1/3 way up is totally blocked with ice.

once defrosted with hot air gun and restarted it works okay until a day or two later and rinse/repeat.

I have carried out forced defrost to sort the issue and it sometimes clears the blockage sometimes doesn’t – the heater element does work in forced defrost mode.
I have carried out diagnostics where you press the refrig and frz buttons and the system does a self test – no warning are flagged.

I have changed the defrost sensor – no change.

there are 2 other sensors associated with the evaporator , I don’t know how to test those or whether they could be the issue? , they have a small resistor in them by the looks of things , can anyone help me in this regard?

I guess the next thing would be a faulty pcb?

I’m hoping one of the gurus here may have seen this issue on this model before and can point me in the right direction.?

thanks for reading and for any help

[SAMURI]

Re: daewoo FRS-U201A1 keeps blocking duct with ice

It may be the flap between the fridge and freezer no fully closing.

Or a sensor fault unlikely to be the PCB.

or if it runs and rarely cuts out it may be a refrigerant problem.

Bob

[daewoo mental arghh]

Re: daewoo FRS-U201A1 keeps blocking duct with ice

thanks for the reply Bob

one other thing I think may be an issue , the fan that is in the freezer section , when I stuck my finger in to stop it , came back in action at a much greater speed (very noticeable) I’ve also used a bit of good old wd40 into the motor housing, if the fan motor was starting to fail and maybe not running on some occasions could this be the problem I’m encountering?

I’m guessing it could be , so I have ordered a new fan motor anyway .

I’m hitting the cheapest things first , fingers crossed for a result on it now.

I shall update once new motor fitted.

[SAMURI]

Re: daewoo FRS-U201A1 keeps blocking duct with ice

Yes it could be the fan motor as this is a more common fault on a Daewoo.

It is rare for a Daewoo to have any other faults than a fan motor not working.

Bob

[daewoo mental arghh]

Re: daewoo FRS-U201A1 keeps blocking duct with ice

update – the fan motor quit in entirety over the weekend

new one fitted today and all good again

[Author]

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