The blower control on my 2001 Grand Marquis intermitently fails to work and blows up a storm and other times it works perfectly. WHat causes this? It is not the rheostat itself as I have taken it out and tested and cleaned it. The blower runs even without the rheostsat
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You may need a mechanic for this. There is a 40amp fuse for the blower in the fuse box under the hood. There is also a blower relay. But you also have fuses and components for the automatic climate control which turns the blower on and off.
If the fan will not run on ANY speed in your Grand Marquis, the problem is most likely NOT the control switch.
Check for power and ground at the blower motor connector. If power and ground is present, replace the blower motor. Otherwise, the problem is most likely a failed blower speed control module (VERY common). The blower motor speed controller is located in the A/C evaporator housing just below the heater hoses.
Note: It is also common for a bad blower motor to CAUSE the controller to go bad. You MAY have to replace BOTH.
I have a 2000 pontiac grand prix with a digital climate control system.
The heat quit working, it doesn't blow out any heat. Now that it is warm
outside the air stopped blowing out any air. The digital temperature on
the climate control is not correct. When it states that it is below 30
degrees on the ext and it is warm outside the air wont be cold. Once it
starts going above 30 degrees the air gets colder. Today the blower stop
working all together. Was told it maybe the climate control unit was
bad. You can hear the door opening/shutting when you switch the temp
from cold to hot. But there was no heat blowing out whatsoever in the
winter time. Could you please give me your opinion on whether or not it
is the climate control unit or something else?
hey there cjwalker,,did you try the blower ressistor its located beside the heatermotor ,,it controlls the speed of the motor ..should be easy to remove ,,,either 2 screws or else it just clips in,,,,,
Have you checked the fuse under the dash. You can run power directly from the battery as you did to test the blower just make sure you use a high amp rated switch and make sure you install an inline fuse rated no more than ten amps if you use say 14 guage wire. Let me know how it goes good luck.
Ok you have a bad blower speed controller if you have power to the motor.
It is located under the hood in the heater housing just below the heater core coolant hoses.
You will have to drain coolant.
Remove the nuts holding the Vapor Management valve and set it aside.
Remove coolant hoses to heater core.
Disconnect electrical connector to the blower speed controller,remove screws,pull it out of heater housing.