Under Dash Air Questions - The 1947 - Present Chevrolet & GMC Truck Message Board Network

69&72Bowties · 06-06-2002, 04:43 PM

I have a 1972 Cheyene. When I bought it and restored it 1 year ago it came with the under dash air unit. After quizing people about this unit they said it was a dealer option.

Has anyone messed with these before? I cleaned it up and put all new hoses, evaporator, condesor, etc on it along with Charging it with 134A.

The lowest we could get the temp is 56 degrees.. That is no where near cold enough to cool down the cab.. Does anyone know if I need to switch expansion valves to a 134A valve, Or are they the same? I have been told that I need to replace that...

I would like to keep this and use it for the next couple of years... I would love to hear some thoughts from anyone on this issue..

Thanks for your help!

Bryan

06-06-2002, 04:43 PM	#1
69&72Bowties Registered User Join Date: Jun 2002 Location: Pineville, LA Posts: 78	Under Dash Air Questions I have a 1972 Cheyene. When I bought it and restored it 1 year ago it came with the under dash air unit. After quizing people about this unit they said it was a dealer option. Has anyone messed with these before? I cleaned it up and put all new hoses, evaporator, condesor, etc on it along with Charging it with 134A. The lowest we could get the temp is 56 degrees.. That is no where near cold enough to cool down the cab.. Does anyone know if I need to switch expansion valves to a 134A valve, Or are they the same? I have been told that I need to replace that... I would like to keep this and use it for the next couple of years... I would love to hear some thoughts from anyone on this issue.. Thanks for your help! Bryan



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