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Why would a 2001 Chevy Blazer heater only blow cold air?
Low coolant in the system. Defective heater control valve. Clogged heater core.
Why would a 96 Taurus wagon heater only blow when running at high RPMs and cool down when idling?
it has a partially clogged heater core.replace the heater core
How will the heater react if the heater core is stopped up?
Your heater will blow cold air only.
Why would heater only blow hot air when you turn the temp switch down Replaced temp switch and still does it?
A restricted/plugged heater core can do that. Try flushing the heater core.
Why would the heater on your bravada only blow cold air?
Possible causes are, low on coolant, thermostat stuck open, clogged heater core or vacuum scorce not getting to the heater control.
What would cause the heater on a 1997 Grand Am Gt to not warm up completely and only blow slightly warm air?
It could be the thermostat on the engine. If the engine does not warm up adequately the heater will never blow hot air.
Why would a 1996 camaro rs heater only blow cold air?
check thermostat, might be stuck closed.
Why would a 2000 GMC Envoy heater only blow cold air?
check you antifreze level if it is low you wont have eat or if you get lots of fog your heater core is bad
Why would a 1996 Pontiac Bonneville's heater only blow hot air regardless of the thermostat?
The heat valve is stuck open.
If the rear heater works ok why does the front heater only blow cold air?
replace front heater corefront and rear have independent heater cores
Why does heater in a 2000 Dodge Neon only blow cold air?
you may not have the heater water hoses plugged in
Why would a 1984 Nissan Sentra's heater-AC fan only blow in the high position?
probably the resistor pack on the evaporator case.
