Question about 1993 Oldsmobile Cutlass Supreme

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Blower fan does not turn on when car is started

My AC/blower fan does not turn on when the car is started. It happens randomly and seems to do it more in higher temps. It will usually kick on after 10-15 minutes of driving. The dealership refuses to replace anything because by the time I drive there, it's working. I have brought it in 4 times already and it never gets fixed.

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Replace the connector that goes to the blower motor, Common problem.

Posted on Jul 22, 2009

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Interior fan has stopped but air con compressor starts when fan is switched on


look for blower motor. if not the case, the blower could just be broken. it can happen once the vehicle gets close to 10 years, but is usually preceded by a noise in the blower. most everything other than the blower, in the ac system, goes back to the mc unit.

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If you mean by turns on/off that it stops blowing air. Then it is most likely the blower motor. The contacts in the motor can get worn. When you are driving the car the vibrations from the road can cause the motor move slightly thus losing and then regaining contact. This causes the blower motor to turn on and off seemly at will. If this is the case. Replace the blower motor.

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1993 Ford Escort Blower Motor & AC Switch


I'm going to start from the beginning.
The blower motor gets power from the high blower relay and it is grounded thru the fan switch and the resistor. So you should have power on the pink white blower wire coming from the high relay to the blower motor. The orange black wire from the motor is ground going to the resistor and fan switch. The blue wires on the control panel are for the ac compressor.
The high blower relay gets power from fuse number 5 in the box. The blower motor is grounded thru the resistor and then thru the fan switch.
Photo courtesy of AutoZone.com
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Due to the age of your vehicle, the brushes in the fan motor are worn out. you will have to replace the fan motor, it is not serviceable.

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Try this. When the blower is not working open the hood. Locate the blower on the passenger side near the firewall. Most likely it is covered with a thin rubber piece but it may not be. Turn the key to the run position. The engine does not need to be running. Turn the blower speed switch to high. Tap the blower with the handle end of a large screw driver. If the blower starts to work replace it.

Oct 26, 2012 | 2003 Oldsmobile Bravada

1 Answer

I turned on the ac and the light does not work, the vents are not blowing and the car is running hot. I have a saturn SL 1996


First check the 15 amp HVAC fuse located in the main fuse block inside the car on the passenger side of the center console, under a cover. If the fuse is good, then the problem may either be the HVAC blower switch (which is the fan blower selector switch), the fan blower motor resistor, or the fan blower motor. An auto repair manual will explain and illustrate for you the steps on how to check each of these components.

Even after pushing the ac light switch on, the fan blower selector switch has to be turned on as well (working) because it provides an electrical path to the positive side of the battery to complete the circuit and turn the ac light on. What the ac light switch does is provide the electrical path for the ac compressor clutch to come on through the ac control relay which is controlled by the car's PCM(computer) when you want ac, but the ac light switch still needs to run through the fan blower selector switch to receive its power. You can turn on the fan without the ac light switch because it gets its ground path(negative) from the blower motor. So the blower motor has to work in order to provide a ground path for the fan blower selector switch to be functional. You could have a faulty blower motor which is why no air blows through the vents. The fan blower motor is located inside the car on the passenger side underneath the dash at the bottom end of the glove compartment box. You'll see it. It's right above where a person rests their feet on the floor. Therefore, if your 15 amp HVAC fuse is good, check to see if you have voltage at the blower motor connector. Unclip the connector and with the ignition on and the fan blower switch moved to any one of the first 3 selections, check for voltage using a multimeter. The voltage will vary because there is a blower motor resistor. Voltage should be higher on setting 3 than 1. If you do have voltage at the blower motor connector, check for a faulty blower motor. The auto repair manual will tell you how to do it using jumper wires.

It's normal that your car is running hot because the radiator fan works in conjunction with your ac compressor. If the ac is on, the radiator fan will be on and therefore the engine coolant temperature will stay in it's normal operating range. If the ac is off, the radiator fan will stay off as well and the engine coolant temperature gauge will begin to rise and show pretty hot (especially at idle). It will do this up until a certain degree then the radiator fan should turn on thermostatically and stabilize the temperature. It's scary and I know what your saying because it does that to my car if my ac isn't on. Don't worry it won't overheat.

May 29, 2011 | 1996 Saturn SL

2 Answers

Blower motor only works randomly


Yes the brushes are worn out inside the blower motot so when you hit a bump it will start working replace the blower motor that will take care of this problem

May 28, 2009 | 1995 Honda Accord

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