Question about Cars & Trucks
When you turn the heat or AC on the fan blows but you do not get heat or AC to come on.
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Posted on Jan 02, 2017
SOURCE: Heat/AC blower not blowing air
heck the blower fan speed control resistor, it is located near the blower motor, they are cheap to replace and the most common cause of this issue
Posted on Nov 24, 2008
Check the relay for the blower. it may be locked . tap it lightly or jiggle the relay or check with a known good relay.this two circuits may be interconnected. check the light relays as well and fuses.
Posted on Nov 30, 2008
Check the blower motor speed control resistor pack is ok.
(The resistor pack is usually located in the blower fan ducting in the air flow).
Check condition of electrical connection terminals on the blower motor circuit - these terminals pass considerable current and over time may fatigue overheat and loosen.
Check operation/replace any blower motor control relay,
Check the blower motor will run if +12v directly applied to the blower motor.
Check operation of the blower motor speed control switch is ok.
Posted on Oct 08, 2009
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