1940’s GE Refrigerator Relay

Comar

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So I did the test and the compressor is running on the black and green wires now. What is that telling us?
 

Comar

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Will do. Just to be clear, you want me to wire it all back up per your previous instructions, right?
 

Comar

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Here is how it is wired now.
 

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rickgburton

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OK, let's check the relay. Do you have 120 VAC between the black/green wire and the three black wires?
Snapshot_3.jpg


If the voltage is correct measure the voltage between the black wire and white wire and between the black wire and the red wire.
Snapshot_4.jpg
 

rickgburton

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OK, make sure the thermostat is on. Did this test check good?
The green wire is probably the thermostat wire but you need to verify that first. So, first set your meter on the lowest ohms setting and measure from the green wire to ground to make sure it's not a ground wire. Your meter should show 1 or open. If your meter shows 1 or open, turn the thermostat on the middle (or highest) setting. Connect your meter to the white wire and the green wire. Your meter should show 0 or closed. Turn the thermostat to the off position and your meter should show 1 or open.
 

Comar

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I just redid this test and it didn’t check good.
With the thermostat on, white and green show open.
 

rickgburton

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OK check the thermostat and see if it's open.
I have the green from the thermostat grounded to the refrigerator.
That might be the problem. Did it check good the first time or did you not check it?
 
Last edited:

rickgburton

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I don’t think it tested good the first time.
That would have been nice to know 28 posts ago Comar. I hope you're not wasting my time. Did you check the thermostat yet?
 

Comar

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Sorry Rick, this is all foreign to me and I was confused. I certainly don’t mean to waste your time. The thermostat shows open whether it is on or in the off position.
 

rickgburton

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OK, the thermostat is bad. I don't know if I can match it or not. Take a couple pictures of it and especially any numbers on it. Post them here and Let me see what I can do.
 

rickgburton

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Oh, I also need to know where the thermostat capillary is mounted. It's the long silver tube coming out the back or side of the thermostat.
 

Comar

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Here’s some pics. They aren’t great but it is hard to get to. It looks like the capillary runs to the metal plate at the back. I can’t see that it goes anywhere else.
 

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Comar

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Rick, I found a thermostat that others had used on these refrigerators. It’s a RANCO A30-180.
I removed the old thermostat from where it was mounted and cut the wire from the back of it. The only wires coming into the old thermostat were the black and white wires.
I know you said the colors don’t mean anything, but should that affect how I can test to the new thermostat?
 
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