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SPT RF-250SS mini-fridge doesn't cool, replaced relay/overload

gossamer

By gossamer
in DIY Appliance Repair Help

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gossamer

gossamer

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Hi, I have another mini-fridge that won't cool. I've fixed a few of them before by replacing the starter relay and overload protector, but I'm not so sure about this one. I've never heard of SPT, but it's virtually the same as a Fridgaire I fixed just the other day by replacing the relay and overload protector.

After replacing the relay and overload protector, the compressor now seems to hum normally, but it switches off after a few minutes of operation and does not cool. I checked the compressor to make sure there were no shorts by using an ohm meter across all three pins on the compressor (all six(?) combinations).

I was thinking maybe it was the thermostat? Should I be able to just twist the wires together to simulate the thermostat closing the circuit to continually cool?

The details:

Compressor: AS30U6
Relay: QB2-4R7
Overload: LJUX-28GCF
                 B77-120   09122

Please see pics attached.

 

frank-overload.jpg

frank-fridge-model.jpg

frank-compressor.jpg

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gossamer

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So no one has any ideas?

 

Are there any pros here?

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