my80Vette said: Not sure if this is same problem. But my sons 78 with air is only blower cold to Luke warm air on hear/defrost/vent. Not sure where to start. Any advice would be greatly appreciated. Thanks
I would begin with a flush of the heater core as described in the posts above. Follow that with a separate flush of the radiator and engine block. If nothing appears to be blocked, reconnect and refill. Warm to temperature, make sure your thermostat is opening and double check the temps of the hoses to and from the heater core.
Your sons car may also have a cut off valve installed on one of the hoses to the heater core. That valve shuts the flow of hot coolant to the heater core when the A/C is on, make sure the valve is opening properly to allow flow to the heater core.
Good luck and let us know what you find.
|UPDATED|1/6/2016 2:50:00 PM (AZT)|/UPDATED|
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John Sigmund
valkman57@sbcglobal.net
NCRS Member 61302
NW NCRS Chapter Member
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