Question about Cars & Trucks
My temperture gauge was running just above the cool mark. replaced thermostat in hopes of fixing heater that blows cool air. after replacing thermostat the temperature gauge is now at normal but the heater still blows cool air?
There should be a vac controlled valve on the heater hose near the firewall. If that valve fails, or something happens to the vac source, the valve will not open or close. I would check that valve and make sure it is working. Both heater hoses should be hot when the engine is warmed up.
Posted on Dec 09, 2012
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Posted on Jan 02, 2017
Check the water control valve behind the engine close to the firewall. This valve opens and closes to allow hot coolant to enter the heater core. It is usually connected to the heater controls with a cable. When you adjust the heater control for heat, a cable activated lever on the valve should move and allow coolant to move through the valve. The cable from the heater control can come loose from the lever, or the valve itself can become corroded and hard to move.
Posted on Oct 16, 2009
if you are sure that your heater core is not restricted. then try to recalibrate the climate control panel. if your a/c system is not working then DO NOT ATTEMPT THE RECALIBRATION it will make your lights on climate control panel flash codes forever.
to reclaibrate the climate control panel just have the engine running. turn the mode to vent, the temp to cold, the blower on high, then press and hold the rear wiper wash and wiper buttons at the same time until the panel lights up then wait about 2 minutes for it to run completly when completed. turn off ignition and then restart the engine try to se if you have heat again. if it doesntwork post the codes it gives you after the calibration test.
Posted on Jan 15, 2009
I would first check to see if both heater hoses are hot to the heater.
if 1 is hot and 1 is cold the heater control valve is closed or the heater core is plugged.
Posted on Jan 14, 2009
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