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If your 1977 Corvette heater is only blowing hot air, it may be due to a malfunctioning temperature control valve or a stuck heater control valve that prevents the flow of coolant from being regulated. Additionally, there could be an issue with the blend door in the HVAC system not closing properly, which would result in only hot air being circulated. Checking the coolant level and ensuring there are no blockages in the heater core can also help diagnose the issue. If these components are functioning correctly, further inspection of the HVAC controls may be necessary.
What else can I help you with?
How will the heater react if the heater core is stopped up?
Your heater will blow cold air only.
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
What is wrong if you replace the heater switch but the heater continues to only blow on the 3rd click and nothing else?
The relay is bad.
Why does your Heater fan only blow on high speed?
Switch problem? Cables disconnected?
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
Why your heater in 98 Lincoln town car only blow cold air?
Could be the Climate Control Unit or Clogged heater core.
What could cause your jeep to only blow cold air?
Thermostat and/or heater core may be defective
Heater does not blow hot air only cold on a 2001 Chrysler sebring?
check your coolant level
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 does your heat in your car only blow on high?
Because the resistor between the heater swithch and the heater motor is not functioning. Usually mounted on, in or near the heater enclosure. Its a common repair, and can be done by the do-it-yourselfer.
