Rank: Member
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Joined: 9/5/2016(UTC) Posts: 9
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Coils in the freezer aren't defrosting. I've replaced the Temperature sensor and the Thermal fuse. :confused: Help
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Rank: Member
Groups: Registered
Joined: 3/28/2016(UTC) Posts: 200
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Have you ohmed out the heater? If so, what reading did you get?
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Rank: Member
Groups: Registered
Joined: 9/5/2016(UTC) Posts: 9
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No I haven't I'll do that this evening. Are the contacts in the freezer or on the main board?
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Rank: Member
Groups: Registered
Joined: 3/28/2016(UTC) Posts: 200
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I would do it from the freezer so u get a good ohm of the heater itself. Can ohm the defrost tstat while u r at it too.
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Rank: Member
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Joined: 9/5/2016(UTC) Posts: 9
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I opened up the freezer today. I checked the thermal fuse an got no reading on it. I bought it from this site not too long ago.
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Rank: Member
Groups: Registered
Joined: 3/28/2016(UTC) Posts: 200
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No reading as in it shows as open? What was the temp of the freezer when you ohmed the t-stat?
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Rank: Member
Groups: Registered
Joined: 9/5/2016(UTC) Posts: 9
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I ohmed the heater the meter was set at x1k it went to zero Seems that the thermal fuse is defective.
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Rank: Member
Groups: Registered
Joined: 9/5/2016(UTC) Posts: 9
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I took it out to check it. Yes it showed no reading as being open. The heater coils shows a complete circuit.
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Rank: Member
Groups: Registered
Joined: 3/28/2016(UTC) Posts: 200
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It opens and shuts off current to the heater when it gets warm enough. That's why I asked what the temp of the unit is? Have you tried forcing it into defrost and checking voltage?
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Rank: Member
Groups: Registered
Joined: 3/28/2016(UTC) Posts: 200
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Nevermind, I was thinking sensor, not fuse. If the fuse is blown, either there is a short somewhere blowing it, or the temp sensor isn't reading the temp correctly and allowing the evap to get too warm. Since you replaced the sensor, I would lean towards a board issue interpreting the sensor data incorrectly. Put the temp sensor in an ice bath and ohm it out. Post the results and we can check the chart to confirm it's working.
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