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What could cause the heater or defrost to NOT blow warm or hot in a 1988 Ford Bronco ll?
Wiki User
∙ 17y ago
Blocked heater core, faulty heater valve, disconnected connection to the heater valve.
Wiki User
∙ 17y ago
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Why wont your heater change from feet to defrost but blows out hot air still?
most likely your heater controls run via vacuum lines. cracked or broken lines could cause this.
What could cause the windows to steam up while drivng a 1996 Taurus?
Look for a leak in the heater/defrost system. Most times it is caused by a minor water leak in the heater system. Steve
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A leaky heater core can do that. Also if the AC is not operative, the defrost mode can't dry the cabin air.
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If defrost is on it could be your compressor going bad. See what happens when you leave off defrost or disconnect your compressor. It only controls defrost and air conditioning. I had the same problem
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You could always take it to the shop You could always take it to the shop
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Could be a sign that the heater core is starting to leak
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Check the thermostat or the radiator. The thermostat could be sticking or the radiator could be plugged.
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Check your fuses!
I recently bought a 1992 Grand Prix and the heater died but the rear defrost still works Any suggestions?
The rear defrost is electric. The heater works off the hot water in your radiator running thru it and a fan blowing the heat into your compartment.. check your thermostat, it could be that your heater core isn't getting and water to it, that is were your car get's it't heat from, if not that it could be lack of water
2002 Oldsmobile Alero only blows warm air when heater is on and only when its on defrost?
Could be,a stuck open thermostat,low on coolant,plugged heater core,faulty temp blend door actuator,
What might cause a heater to blow cold air in a 1992 Wrangler?
heater core could be rusty and old or line to heater core could be plogged most likely old heater core
