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Chevy S-10
Heater Cores and Blower Fans
Car Heaters

What would cause the heater to produce heat but not blow air no matter which setting it is on?


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Wiki User
2008-10-14 14:38:07
2008-10-14 14:38:07

There is probably something wrong with the fan motor. It could be the fan motor has a bad switch or connection or the fan motor could be bad. The above Answer might be true in some cause's but before I replaced a fan motor I'd check the fuse first. The blower cage could be dirty. I'd bet it's a resistor or a relay. Usually they are right next to the fan somewhere. The wires split off from the the bundle and go to the fan and the resistor.

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NO! 100-120F setting normal. 140F can cause accidental scalding.

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No, not if it's on a heat setting. Most home thermostats have a "Fan" setting that will blow cold air if the attic is cold.

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I feel these are unrelated but you can investigate a leak in the hoses leading to the heater core as they maybe leaking onto the exhaust pipe, that would produce white smoke, but not from within the tailpipe exhaust. Water and oil leaks will produce white smoke the smell will help you determine which it is.

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was there something on your dash that fell in the vent, a bad fan will make noise all the time.

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the heater box is under the dashboard most of the time in the middle. The heater blowing system have doors . The door for the foot is next to your leg he have one metal cable could be this come out. If yes, have to clip it back. This electric its more difficult but just check first


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