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Home » Public Forums » GMCnet » OEM Fridge Help/Verification For The Relay/Thermostat
OEM Fridge Help/Verification For The Relay/Thermostat [message #280121] Wed, 17 June 2015 13:57 Go to next message
A Hamilto is currently offline  A Hamilto   United States
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Can anyone else tell me if I am reading this right?

When running on DC the relay has the thermostat switching 12VDC on and off, and when plugged into 120VAC the relay engages and the thermostat switches 120VAC on and off. Am I seeing that correctly?

http://www.gmcmhphotos.com/photos/data/15/medium/Norcold_Schematic_crop.jpg

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Re: OEM Fridge Help/Verification For The Relay/Thermostat [message #280127 is a reply to message #280121] Wed, 17 June 2015 15:13 Go to previous messageGo to next message
RF_Burns is currently offline  RF_Burns   Canada
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Yes, that is correct, Thermostat switches the power supplied, either 12VDC or 120VAC

Bruce Hislop
ON Canada
77PB, 455 Dick P. rebuilt, DynamicEFI EBL EFI & ESC.
1 ton front end
http://www.gmcmhphotos.com/photos/showphoto.php?photo=29001
My Staff says I never listen to them, or something like that

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Re: OEM Fridge Help/Verification For The Relay/Thermostat [message #280129 is a reply to message #280127] Wed, 17 June 2015 16:47 Go to previous message
A Hamilto is currently offline  A Hamilto   United States
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Registered: April 2011
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RF_Burns wrote on Wed, 17 June 2015 15:13
Yes, that is correct, Thermostat switches the power supplied, either 12VDC or 120VAC
Thanks. It seemed unusual to me that it would work that way. I figured when it was on 120VAC power the thermostat would just switch the 24VAC of the compressor and wouldn't care if it wasted a few watts in the transformer when the compressor was off. Pretty cool that when the thermostat doesn't call for cooling, 0 power is wasted, even on shore power or generator.

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