AC Question - thermostat? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

75stepside · 06-20-2005, 03:42 PM

finishing up the last thing to wire in my engine compartment - the AC components. I wired the evap housing up, but i'm missing one thing - the two green wires from the compressor cutoff switch, one goes to the compressor, the other goes to the "AC thermostat" or something???? any idea what that is, where it is, and where i can get one!?!??!

NeCrOmAnCeR · 06-20-2005, 05:53 PM

Should have two seperate sensors. One is the pressure switch, found on one of the refrigerant lines, and the other is the anti-ice switch. It looks like a thermostat which has a lead which is inserted into the evaporator core. Should be able to get either at a parts store

75stepside · 06-20-2005, 10:26 PM

any pics of this??? i know about the sensor at the receiver/dryer - the wires that come off of it, the one goes to the compressor, where does the other go.... looks like it may go inside the cab????

75stepside · 06-21-2005, 04:04 PM

someone's gotta know!

NeCrOmAnCeR · 06-21-2005, 08:03 PM

Here are some pics of mine. Green wire from compressor goes to the pressure switch, then to the thermo switch, then into the cab to the control head.
You can see the thermo switch on the bottom of the evaporator housing, directly below the fan relay. Has the green wires running to it.

06-20-2005, 03:42 PM	#1
75stepside Proud Member Join Date: Nov 2002 Location: Pittsburgh, PA Posts: 741	AC Question - thermostat? finishing up the last thing to wire in my engine compartment - the AC components. I wired the evap housing up, but i'm missing one thing - the two green wires from the compressor cutoff switch, one goes to the compressor, the other goes to the "AC thermostat" or something???? any idea what that is, where it is, and where i can get one!?!??!

06-21-2005, 08:03 PM	#5
NeCrOmAnCeR Registered User Join Date: Feb 2004 Location: Hodgenville, Ky Posts: 735	Here are some pics of mine. Green wire from compressor goes to the pressure switch, then to the thermo switch, then into the cab to the control head. You can see the thermo switch on the bottom of the evaporator housing, directly below the fan relay. Has the green wires running to it. Attached Images

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06-20-2005, 05:53 PM	#2
NeCrOmAnCeR Registered User Join Date: Feb 2004 Location: Hodgenville, Ky Posts: 735	Should have two seperate sensors. One is the pressure switch, found on one of the refrigerant lines, and the other is the anti-ice switch. It looks like a thermostat which has a lead which is inserted into the evaporator core. Should be able to get either at a parts store

06-20-2005, 10:26 PM	#3
75stepside Proud Member Join Date: Nov 2002 Location: Pittsburgh, PA Posts: 741	any pics of this??? i know about the sensor at the receiver/dryer - the wires that come off of it, the one goes to the compressor, where does the other go.... looks like it may go inside the cab????

06-21-2005, 04:04 PM	#4
75stepside Proud Member Join Date: Nov 2002 Location: Pittsburgh, PA Posts: 741	someone's gotta know!



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