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Old 10-30-2010, 06:04 PM #1
Stillrunning Stillrunning is offline
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Heater Speed Swich Problem
My heater only works on high speed.Is there a resistor block that has failed? What would cause this?The selector switch goes through all positions but does nothing except at the high position.It's a 92 4Runner with air conditioning.
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Old 10-30-2010, 08:26 PM #2
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yes there is a resistor in the heater box .. usually causes the 1 speed problem ..



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Old 10-30-2010, 11:08 PM #3
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It's most likely the fan speed resistor module. It's located in the ductwork under the dash, pass side.
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Old 10-31-2010, 09:11 PM #4
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Just did mine the other day. Had the same prob, only worked on high... Got one off e-Bay for $20 shipped... I peeled the carpet back a bit to make a little more room, its close to the firewall in the ducting..
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Old 12-13-2010, 12:50 AM #5
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It was the resistor block.A cheap and easy fix.
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Old 12-13-2010, 05:08 PM #6
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just a question how did you manage to unscrew the screw closest to the firewall??
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