Its
faulty blower motor resistor. The low and medium speed on blower motor is
controlled by resistor and its actual speed is high. So because resistor is not
working, blower motors actual speed which is high is working. It
can be faulty blower motor or faulty blower motor resistor. Get the blower
motor inspected. If it's faulty it has to be replaced.
======= For
blower motor testing and replacing, check the link below: ---- http://repairhelpcenter.blogspot.in/2012/02/blower-motor-replacing-for-all-vehicles.html ------------ These will help. Thanks.
Blower motor Testing/replacing for all vehicles?
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help heater stop working
first check heater blower motor HVAC 25 AMP FUSE.IF FUSE OKAY.REMOVE HEATER BLOWER MOTOR HOT WIRE SEE IF BLOWER MOTOR WORKS IF NOT BLOWER MOTOR BAD IF BLOWER MOTOR WORKS WHEN HOT WIRED PROBLEM IN THE CONTROL MODULE SWITCH..IF YOU HAVE BAD BLOWER RESISTOR ONLY HAVE ONE BLOWER SPEED. MEANT TO SAY ALSO CHECK AC BLOWER MOTOR RELAY. IT COULD BE BAD.
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