It sound like an electical problem. I would think it to be a defective switch, relay or wiring . Try pulling out the relay or fuse.
You won't hear the blower motor when you turn on the AC, and it won't blow air through the AC vents. If you want to open up the HVAC compartment, you can test it with a voltmeter.
Common causes, blower motor resistor, blower motor, wiring or controls
A malfunctioning blower motor resistor will cause the blower motor not to work. When the resistor is bad the blower motors will not turn on.
check heater blower motor blower wheel could be broken off The knocking comes from an Acctuator that has stripped out in the Hvac case. You Have to replace the acctuator to solve the problem.
When you beat the blower motor, you are probably shaking the blower resister. The resister is what controls the blower speeds and is probably bad or loose.
I think that you might have a bad blower motor, but I'm not really sure. Here is a link to a "How To" video of replacing the blower motor--> http://www.youtube.com/watch?v=frZl49p2quk It is very easy to do and don't waste money taking it somewhere to get it installed.
blower motor actuator needs to be replaced.
What can happen when a blower motor resistor goes bad is that the motor will run and then suddenly stop running on a regular basis. Sometimes the blower fan will not turn on and cause the motor to overheat.
To move air, that is what it does.
you have a bad heater blower motor or something stuck in blower cage
when you turn on blower it makes a strong odor of burning rubber.
The blower motors only work with the engine running. If the blower motor has three wires on the electrical plug, then the blower motor module is built into the unit & it's very expensive. Sometimes, you can tap on the motor with a hammer & it may work or slowly turn. If this is the case, replace the blower motor.
(1)If vehicle is equipped with airbags, disarm the airbag system. To do this, turn the ignition switch to OFF position. Detach the cable from the negative battery terminal, then detach the positive cable. Wait two minutes for the electronic module backup power supply to be depleted. To enable the system, turn the ignition switch to OFF position. Connect the positive cable first, then connect the negative. (2)Disconnect the blower motor connector. (3) Remove the blower motor mounting screws and remove the motor. (4)Remove the blower motor wheel hub pushnut and the clamp from the shaft. Pull the blower motor wheel from the shaft. (5) Installation is the reverse of these steps. - Mazda Pickups Repair Manual
check the blower motor resistor pack. should be firewall side of heater rectangular connector with 4 or 5 wires.
The speed problem with the blower motor is a defective Blower Motor Resistor Pack. Replace it. The non-functioning turn signals, is more than likely a defective Flasher Relay or a blown fuse. If the turn signals come on but do not flash it is the flasher.The speed problem with the blower motor is a defective Blower Motor Resistor Pack. Replace it. The non-functioning turn signals, is more than likely a defective Flasher Relay or a blown fuse. If the turn signals come on but do not flash it is the flasher.
You see that knob you turn to run the blower? That's it.
Blown fuse, defective fan control switch, defective blower motor resistor pack, or defective blower motor.
The blower in most 90's Cadillac's indeed can be changed out however, you will need to cut along the lines as indicated in the plastic barrier found housing the blower motor itself. Odd as it is, you really do cut this plastic shield and remove the blower. I've done it twice and it works just fine. NOTE: It is not easy getting a new blower back in as it was getting the old one out. Just have a little patience, go slowly and turn the blower motor slowly as you put it in. (not the squirrel cage itself) but the motor housing. It seems to fit easier with a gentle turn as it drops into place.
If it were a blown fuse, it wouldn't turn on at all. What you'd be looking for isn't a fuse, anyhow - it's a relay, and a faulty relay is a possible cause of the problem. Shorted hot wires or faulty ground wires are another possibility. The blower motor itself might be on its way out, as well. The HVAC compartment is located on the far right hand side, behind the dash. It contains the blower motor and fan, AC evaporator, and heater core.
the blower motor is going bad it will stop working shortly
When the blower motor stays on it means there is a short to power, or the relay is sticking. 99.9% of the time the relay sticks. I belive on the 2004 silverados the blower motor relay is internal to the blower motor resistor. Try to find an auxillary blower motor relay and if there isn't one then replace the blower motor resistor.
Check fuses Check ignition switch noted for connectors loosening and wearing
Check blower motor fuse Check to see if blower motor is getting power
The blower motor is under the pass side dash where your feet would be if you stretch twist the motor to get it out of the housing turn the motor towards the fuse box to get it out once you have it free od the housing good luck
Can you feel anything coming out of the vents. Also if you turn on the dial that controls the speed of the blower, and you dont feel anything coming out then you need a fuse or blower motor or mabe a resister for the blower motor. I would have to say that 8 out of 10 times its usually the blower motor resistor. Hope this helps