Question about 1995 Mercury Mystique

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Fan control doesn't work

I am sure I need a replacement speed control for the heater fan, but can not see what panels have to come off or ow to get them off? Can I get advise on where to start.

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You will have to remove the panel from under the dash on the passenger side, I believe it has 4 push pins holding it up. Then you will be able to get to the resistor or the motor.

Posted on Feb 03, 2009


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2007 Chevy Cobalt hit by lightning, low speed fan remains on, no ignition

do you mean the radiator fan or the heater cooler fan. radiator fan is the relay in the engine bay tap it it should go off if not replace, heater fan and cool the control unit may be damaged lung can do that to electronics. remove the battery make sure you have your codes to hand when you put battery back on. remove battery leave for 10 min with this off. then using some wire connect the live and negative wires on the body not the battery this should discard the static in the electrics. but make sure it 10 minuets before doing this.when you put battery back on the fans should not be running, if it is the lightning has fues the board and will probably need replacing.

Jul 03, 2017 | Cars & Trucks

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How to disconect the control cables on 1997 geo metro heater control?

does the fan work on high.
yes, then the heater resistor block is burned up. replace that
or look at it to see if the coil there are burned up and gone.
please post systems first, then your guess.
the FSM covers all this, step by step, take apart dash. under
HVAC chapter,. log in and its there.
factory service manual.
removing the control is tricky on all cable cars.
you must get the cables loose before the panel can move out.
the cables all clamped down or they will be dead. (all cars with cables drive)
please post of HIGH speed blower works on high first.
why do this the hard way, at the worst we can use a voltmeter
and prove what is dead, first.

see those rules on cables in the FSM below?
ill not post the panel Remove
  1. Disconnect the negative battery cable.
  2. Remove the heater control unit from the instrument panel.
  3. Remove the mode and temperature control cables at the heater case. Remove the cables from the vehicle.
  4. Remove the fresh/recirculate control cable at blower case and remove from vehicle.
  5. Installation is the reverse of removal.
  6. Adjust the cables prior to attaching at heater control unit.

now lets look at the blower, dead, on all speeds but HIGH , i bet.
this is your cave man simple blower
so if FUSE marked HTR is good, and 12vdc is on both sides of
fuse keyon, then it is good,. and 12vdc lands on motor top
where below on HIGH the blower and switch works on high.
if say the right side resistor blows up, (as all do)
then all lower speed fail. and DC power fails to reach the fan motor.
how is that? clear>?


Feb 27, 2015 | 1997 Geo Metro

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It would help to know the make and model. Different manufacturers put them in different places and mount them different.

Feb 19, 2015 | Cars & Trucks

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Before you rip, check the 30A HEATER CIRCUIT BREAKER in the instrument panel fuse panel. The input is hot with the engine running. CB output connects directly to the heater blower motor. A cluster of heater blower motor resistors determines blower speed as selected by the blower switch in the heater control assembly. The switch setting is sent to the powertrain control module (PCM) which acts to turn the blower motor on at the selected speed.

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High speed doesn,t work on heater switch.

Pull the heater control panel out of the dash and inspect the blower speed control switch, look for signs of a burnt connector to the switch, it will be discolored looking, if this is the case replace the switch and install a repair connector

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Heater / air conditioner fan control doesn't engage fan. Previously, it only worked in high speed.

I would replace the blower motor resistor first then see if that corrects this. The resistor is located next to the blower motor under the dash.

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Heater sensors

The fan is not the problem then, It sounds like the switch for controlling the fan speed or on and off is the culprit. If it is just one switch that control on/off and the speeds then try wiggling it, push and pulling, it may be those contacts of the switch are worn out. There are lots of these cars in the junk yard. I would recommend replacing that panel with a used one.

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this sounds like you need a new blower motor, check fuses first if not blown replace blower motor

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Probably just a coincidence. Try the fan on all speeds. If it works on some, but not all, then the resistor module is at fault.
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