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Posted by charlie on August 1, 2008, 1:04 pm
> trader4@optonline.net wrote:
>> wrote:
>>>
>>>
>>>> In the freezer portion of my fridge I've started having a problem with
>>>> frost build-up.
>>>> I went on a four day trip, and when I came back everything in the
>>>> freezer had a thick coating of frosty ice crystals.
>>>> I thought perhaps I had left the door cracked a bit so I cleaned off
>>>> the
>>>> frost, checked the door seals - they seem air tight, and closed it back
>>>> up.
>>>> But the frost continues to build no matter what I do. My first thought
>>>> was an air leak letting humidity into the freezer, but the seals seem
>>>> fine.
>>>> It cools fine - i can turn the thermostat down cold enough to freeze
>>>> everything in the fridge portion too.
>>>> What else can cause this?
>>> I am still betting on the door seal. That frost is water. The
>>> water has to get there somehow. It does come out of the air.
>>>
>>> --
>>>
>>> there's something wrong with the defrost, probably the relay.
>>
>>
>> That would be my suspicion too. Door seals don't fail on 3 year old
>> fridges and with a failing seal, the problem comes about slowly, not
>> all of a sudden. If the door is closing properly, then the automatic
>> defrost is likely not working.
> But, if it were the defrost cycle, it would not usually cool properly. I
> have
> had that problem recently with a Kitchen Aid built in .... well actually,
> 2
> years ago and now again recently. Both the fridge and freezer stopped
> cooling properly. 2 years ago, I shut it down and called the service
> company. They came out, complained that I shut it off, said I needed
> a new compressor (because it was "5 years since last replaced") and left.
> After they left (leaving the unit on) I noticed it was cooling normally.
> So
> I watched it. It worked for 2 years perfectly. And then about a month
> ago it iced up. The coils were nice and frosty. I disassemble the coil
> area in the freezer, checked that the ice melting heater had continuity
> and
> checked the defrost temperature sensor, which click at about 32 degrees.
> I assumed it must be the 3rd and last component in the defrost cycle, the
> timer. For $20, I replaced the timer and it has been working since. Also
> it now runs much less with this newly designed timer. I think the old
> design
> timer defrosted much more than necessary.
>
> Anyway, when my defrost cycle was bad, I really didn't get too much
> frost on anything except the coils ... maybe a little more. But, if it
> were
> really humid in the OP's area and the door opened a lot, that may account
> for the frost, if the defrost was not properly working.
well, i had exactly the same problem as the OP, and it was the defrost
relay. it would get cold, but would build up 2" of ice in a couple of days
on the back wall of the freezer (humid part of summer in phoenix). it still
kept good temps in both the freezer and fridge.
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