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GE defroster not working
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Model: TBF21CPD Brand: GE Age: More than 10 years
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jerryblewis  
#1 Posted : Thursday, September 25, 2008 10:17:48 AM(UTC)
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jerryblewis

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Coils in floor of freezer are frozen solid. The front of the partition between the freezer compartment and the fresh food compartment is hot. Following other posts on this site I have replaced both the thermostat and the timer and I tested the heater element with VOM and got a resistance reading. Also, the fan is working. If I unplug the refrig and thaw it out it cools fine for a week or two and then gradually freezes up to the point that frozen foods begin to thaw. Could there be a wiring problem and if so where do I find a wiring diagram?

Help please...Jerry
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libertyappl  
#2 Posted : Thursday, September 25, 2008 11:14:09 AM(UTC)
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libertyappl

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There should be a wiring diagram in your unit, usually behind the kick plate of near the compressor, in an envelope.
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jerryblewis  
#3 Posted : Thursday, September 25, 2008 11:50:45 AM(UTC)
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jerryblewis

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I found the diagram...On the diagram it shows a mullion heater located between the two compartments. Apparently this the source of the heat I feel there. Should the mullion heater be on constantly? Would this affect the defrost system? Any idea where to start troubleshooting?
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libertyappl  
#4 Posted : Thursday, September 25, 2008 12:21:53 PM(UTC)
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libertyappl

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The mullion heater is usually on when the compressor is on. Is your compressor running all the time?
It's possible one of the new parts may be bad.
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jerryblewis  
#5 Posted : Thursday, September 25, 2008 12:25:08 PM(UTC)
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jerryblewis

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Yes the compressor seems to run all the time. Is there a way to test the thermostat and timer?
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libertyappl  
#6 Posted : Thursday, September 25, 2008 1:06:31 PM(UTC)
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libertyappl

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You can test them with your ohm meter.
Is this an US model? I can't seem to pull up the model number to view it.
Nat
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jerryblewis  
#7 Posted : Thursday, September 25, 2008 4:01:22 PM(UTC)
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jerryblewis

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As far as I know it is a US model. Looking at the diagram on your web site for TBF2CNB looks the same as mine (TBF2CPD). Is the thermostat normally open or closed ?
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libertyappl  
#8 Posted : Thursday, September 25, 2008 7:40:15 PM(UTC)
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libertyappl

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You should have continuity on the thermostat
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