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Thermostat stuck open, if older car possibly clogged heater core- when run at oper temp the hoses going into/out of heater core be sure one is very hot - start with thermostat $$$ cheap & easier than a heater core problem!
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∙ 13y ago
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Why would your heat only work on defrost?
ihave a 1986 chevette that when i turn defrost on it blows out heat and when i put heater on it blows out only cold air? ihave a 1986 chevette that when i turn defrost on it blows out heat and when i put heater on it blows out only cold air?
How will the heater react if the heater core is stopped up?
Your heater will blow cold air only.
Why does heater in a 2000 Dodge Neon only blow cold air?
you may not have the heater water hoses plugged in
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 ac and heater on 2000 f350 blow air through defrost when another position is selected ac clutch clicks and air still only blows through defrost?
You have vacuum line leaks somewhere.
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
Why would a 2001 Chevy Blazer heater only blow cold air?
Low coolant in the system. Defective heater control valve. Clogged heater core.
Why doesn't heat blow out floor only?
the heat blows out the defrost when it should blow out floor vents only
Why would a 1996 camaro rs heater only blow cold air?
check thermostat, might be stuck closed.
Why will the Car heater for a 2002 mercury gm ls not blow hot air only cold?
Check for low coolant
