The heat valve is stuck open.
it is a heater. heat. it blows heat. warm air
Could be, low on coolant, stuck open thermostat, plugged up heater core, faulty temp blend door actuator,
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.
Your heater will blow cold air only.
it has a partially clogged heater core.replace the heater core
Low coolant in the system. Defective heater control valve. Clogged heater core.
Sounds like the blower motor resistor has gone bad. This is sometimes located behind the lower dashboard in the area of the glove box.
I have a 1997 Ford Taurus that would only blow cold air, I replaced the thermostat and no heat. We flushed the system from a ford dealer no heat. Had to replace the heater core plenty of heat now. Other possibilities are: * a malfunctioning temperature blend door * Plugged heater core See "Related Questions" below for more
A restricted/plugged heater core can do that. Try flushing the heater core.
Possible causes are, low on coolant, thermostat stuck open, clogged heater core or vacuum scorce not getting to the heater control.
Any heater that only blows luke warm air isn't getting warm or hot water to the coil. This sounds like a problem with the thermostat not closing, and allowing the engine to heat the water properly for the heater.
It could be the thermostat on the engine. If the engine does not warm up adequately the heater will never blow hot 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? 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?
The heater in your car uses waste heat from the engine to heat the car. When the engine is not running there is no heat to distribute.
check thermostat, might be stuck closed.
replace front heater corefront and rear have independent heater cores
check you antifreze level if it is low you wont have eat or if you get lots of fog your heater core is bad
you may not have the heater water hoses plugged in
check both heater hoses under the hood with engine at running temp. if only one hose is hot your heater core is restricted( try flushing it out),m low coolant will also cause no heat since the heat comes from the hot coolkant in the heater core. if both hoaes are hot chances are the blend air door in the interior heat unit is faulty or climate control is not calling for heat.
This Would Not Allow Heat Inside The Car. And Would Not Damage The Engine. If You Bypass The Heater Core You Have No Heat. The Heat Comes From Yhe Water Flowing Through It From The Engine. Its Winter Try To Have The Heater Core Repaired Or Replaced. the heater core is the only thing that provides heat to the inside of your car so bypassing it would leave you cold but it will not hurt the engine as long as you couple the two hoses together
The relay is bad.
I have the same issue, sounds like a blend door problem. Could be up to 800.00 to fix it....My 1999 Expy would blow out cool air if I played with the controls, now I only have hot air. The rear air works fine when changing the temps you may also try the heater valve which is under the hood , the heater hoses hook to it .. i have a 99 expy with a 5.4 and my front and rear heat were dramatically fdiff. in heat neither were hot .. i changed the heater valve and waalaa .. now 16 degrees 15 mins snow melts off my windshield .. u ...
Your thermostat is the likely culprit here it is probably stuck closed. Have it checked out.
The flap is stuck open that controls when and where the heat goes