Started yesterday, there seems to be no control over the blower system. Blows contnually on high when the power is off, when power is on it blows sort of normal but the location is hosed up. Is there any manual available for the car? Is there a online schematic available? How about a fuse location? I am thinking it is computer controlled????
There is a relay located in the under hood fuse box , front blower motor relay .Plus a fuse ,fuse #42 40 amp. The relay is controlled by the integrated power module . There are two type systems ,one has a resistor block an the other uses front blower power module . (computer) Check out the wiring diagram here http://www.bbbind.com/free_tsb.html Enter vehicle info. year , make , model and engine size. Under system click on HVAC ,then under subsystem click on HVAC controls . Click the search button then the blue links. I think the difference is a manual or automatic system . Which does your's have ?
Blower Motor Runs all the Time
SOURCE: Heater blower
Sounds like the blower motor resistor is bad. These things go bad all the time. and for the switching modes there is a vacuum line that runs under the window in the engine compartment and runs by the alternator, its tiny and may take a few minutes to find. check first by the evaporator case and follow it by the alternator to the driverside of the throttle body. these too break and will not allow the heater mode changes. the blower motor resistor controls the fan speeds and the vacuum line allows which vent the air flow goes through.
SOURCE: 94 ford escort blower motor
the resistor to the blower motor is right beside it. you might want to check it pout it will cost most at $15
SOURCE: Air Conditioner blower no longer blows
verify that there is power to the blower motor and that a fuse is just not blown.
if the fuse is good and there is power to the motor you will need to replace the blower motor.
SOURCE: heater blower motor only works on high
You most likely need to replace the ignition switch. Sounds weird, but check out other posts. It works.
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Control valve sends the air where ever it wants regardless of the switch position and, the a/c is intermittant with cold and hot air. I took it to the dealer under extended warranty and all they did was charge me $100 deductable and changed the filter.
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