Yes it works o all three speeds in the AC position but it doesn't i the heater position I was wondering if the switch is bad or is there a relay that is bad.
379 pete sleeper heat and a/c problems
Discussion in 'Peterbilt Forum' started by coulds, Apr 24, 2013.
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You ever figure out the issue @coulds
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Did you replace the pressure switch in the sleeper HVAC box? It's connected to the bottom of the expansion valve. It's got to have power to it. Make sure you have power to it and that's it's clicking on and off. It if doesn't come on it won't allow freon into the evap core. I'll post a pic when I get back to my truck.
Are the freon lines getting cold at all? -
Oh and there is a temperature rheostat the 379 sleeper. When you turn the temperature to cold or hot it will turn the blower motor on and off. The rheostat it part of the temperature control switch.
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Where is the expansion valve location in 379 pete
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IF you have a top bunk then the controls are against the from cabinet facing down at the mattress, take the grey or tan cover off and you have full access.
If you DON'T have a top bunk the part under the cabinets that's roughly 3' long comes off and you have full access to the controls that way as well. You shouldn't have to remove the cabinets at all.. -
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