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Heater Fan
Posted: Wed Oct 10, 2007 7:51 am
by steiner_5000
Well its starting to get cold here in Iowa so I started up my bronco and turns the heat on but nothing happend. The heater fan doesnt' atcually kick on untill I have it on the highest setting. Does this mean my blower switch is bad or the blower itself?
Posted: Wed Oct 10, 2007 8:19 am
by partsman66
sounds like the switch.what year?
Posted: Wed Oct 10, 2007 9:55 am
by steiner_5000
Its an 85
Posted: Wed Oct 10, 2007 10:08 pm
by Nobody
sounds like the resistor to me. Open your hood. Look at the air box on the passenger side where the blower motor is. You shoud see a plug that connects to a little do-dad in the box held in by a couple screws. That's the resistor.
Posted: Mon Oct 22, 2007 8:24 am
by Ruffinit
Yep, I think Nobody's got it pegged.
Just did the same thing to mine. On the highest setting the fan works because there is no resistance "in-line" with the blower motor. The other positions use a wirewound resistor to slow the motor (higher resistance = slower fan speed). Anyway, pull the plug, pull the resistor pack (2 screws) from the engine side and get another one. They don't go out often, so a pull from your local junk yard will most likely yield you a good one.