Me problem is that my 2002 Alero heater controls do not work, But let me clarify what i mean. The knobs that turn for fan speed, hot or cold, and defrost all work fine, but the push buttons below to circulate the air, the a/c button and the rear defrost buttons do not work. So i checked the fuse from under the hood for the htr - A/c and it was blown, so i replaced it with another 10amp fuse and it blew that one also, Now i know there is a short or something someplace.
And the other part of the question is, i took the heater control piece out of the dash and there was only 3 spots that had wires connected and there was a fourth spot twords the top that did not have anything plugged into it, Is it suppose to? If it is where is it located i searched every place i could image. Any help would be greatly appreciated. Thank you
Re: Me problem is that my 2002 Alero heater controls do...
I SEE 3 THINGS THAT WILL CAUSE FUSE TO BLOW.BAD AC COMPRESSOR CLUTCH RELAY.AC COMPRESSOR CLUTCH COIL SHORTING OUT.OR THE COMPRESSOR DIODE OR WIRE CONNECTOR HAS A SHORT IN IT.
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WELL TURN ON AC MAX COLD HIGH TO SEE IF COOLANT FANS TURN ON.IF NOT YOUR REFRIGERANT SO LOW THAT THE AC REFRIGERANT PRESSURE SENSOR WONT CLOSE CIRCUIT TO TURN ON COOLING FANS.MEANING YOU NEED HAVE AC CHECKED AND CHARGED.ALSO CHECK COMPRESSOR FOR POWER IF NOT YOU HAVE BLOWED FUSE OR BAD RELAY.IF FUSE AND RELAY GOOD YOUR AC COMPRESSOR CLUTCH COIL OPEN OR THE AC CONTROL SWITCH IS BAD.IF COMPRESSOR IS RUNNING WHEN YOU TURN ON AC YOUR AIR TEMPERATURE ACTUATOR NOT WORKING.
the heat or cold adjustment control in my 2002 grand caravan will only work on maximum adjustment, if you try to reduce the speed of the blower by turning the control knob 1 knot, 2, 3 and 4 down it won't work it only work at the last position which is the 5th or last turn of the control knob. please let me know what could be the problem. thanks.
check coolant.if check out okay .start engine let it get operating temp. then feel top hose if hot thermostat working .problem is in the dash the heater door not getting vacuum to open .could be stuck. or heater control unit could be bad
try changing the thermostat if thats not it check and see if you have water leaking in the passenger side floor board if so then you need a new heater core
Did the switch break because it was stuck? If so, then yes, they will have to change actuators and doors. Does the fan work on all speed setting? If so then you do not need a blower resistor. The resistor pack only controls the current flow to change speeds of the fan.
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