Heater fan stopped working

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

check blower motor resistor connector could be burnt or resistor it self

Hello, Just follow the wire from the heater fan under the hood. Trace the power wire from the heater fan and it will join a connector midway on the Firewall. It will have 2 screws and 1 electric connector. Tap the connector with a screwdriver handle and see if the part starts working again.

If it does not, get a used or new blower resistor. Work on a cold engine and remove the screws and connector from the part. Temporarily plug in the new part to the connector and turn the Key to run with the fan ON. It should be blowing now. Turn off the switch and put the new part where you can reach it with 1 hand.

Undo a heater hose at the top rear of the motor going in front of the opening for the switch. With 1 hand remove the hose end, then switch parts with the new blower resistor with the other hand and slide the heater hose back on its fitting. Tighten the heater hose.

Then secure the new part into the Firewall and fasten its connector. You should have lost little Antifreeze by working on a cold engine as the hydraulic lock kept the fluid from running out.

This should be all you need to do except clean any spills away.

Sounds like your heater/bower motor has an issue. Behind the glove box door is your heater motor, and mounted to it is a heater motor resistor. It will have a wire harness plugged into it. These go bad, and you will loose low speeds.

A heater blower motor resistor is an electronic device with three or more progressive resistors that allow the heater blower motor to operate at slower speeds. The highest speed of the heater blower motor is not controlled by the resistor, so when the resistor fails, the fan will often work on the highest speed setting, but not the lower speeds.
To resistor is generally located under the dashboard and under the hood, near the blower motor . The resistor's electrical connector is disconnected, the resistor is removed and the new resistor is installed. On some vehicles it may be easily accessible, and on others it may take partial dashboard removal to replace the resistor.
Look under the hood, generally the wiring for the Blower resistor is attached to the wiring to the blower motor itself
It's inboard & below the motor, near the accumulator. You can see it standing beside the passenger fender. it's the off-white connector behind the L heater hose above the vacuum reservoir & the white WARNING sticker

The blend door may not be working properly. It is actuated by a vacuum motor.

or the following part may be bad:

Blower Motor Control Module Removal & Installation To Remove:

1. Remove the insulator from the right side of the instrument panel.
2. Disconnect the connectors from the blower motor resistor and blower motor.
3. Loosen the two forward screws and remove the rear screw of the resistor assembly.
4. Remove the blower motor resistor assembly.

To Install:
Install the blower motor resistor assembly. Install the rear screw and tighten the forward screws. Connect the electrical connectors to the blower motor and resistor assembly. Install the insulator under the right side of the instrument panel.

The Blower Motor Resistor is located on the passenger side firewall, not far from your A/C's H-Valve (or expansion valve), going inside of the vehicle. The blower motor resistor has a 4 or 5 way black connector plugged into it and this is the only visible portion of the Resistor you will see. Remove the wiring connector and remove the 2 or 3 screws with an 8 mm or 5/16" socket (8 mm and 5/16" are the same). Once the screws or fasteners are removed, just pull the blower motor resistor out of the firewall and if you look at it, it will have various coils of wire on it, sometimes it will show burnt coils, but you can always check the various coils with an Ohm-meter.

Aside from that, install the new Blower Motor Resistor and Voilà! Your inside Blower Motor should work just fine.

A brief note here, if your fan doesn't work when the fan switch is on High, then it's not the Blower Motor Resistor, but possibly the Blower Motor itself. Should this occur, please get back to me insofar as how to replace the blower motor and why the blower motor's wires have to be twisted...even with the new blower motor fan.

Best of Luck,

"00 Buck"

"Still living on the Right Side of Dirt..."

Your looking for the blower resistor. Its on the passenger side under the dash. Two of the wires go the the blower motor. The wire connector and the resistor can burn or corrode. The replacement is easy two screws hold the resistor in and the connector can be replace with **** connectors.

blower motor or resistor or the blower motor control switch.

The blower motor resistor is under the passenger side of the dash. If its still there you will have to remove the plastic cover, not tough. Your looking for a flat connector with 4 to 6 wires. The resistor will have 2,3, or 4 little bolts holding it in. It will be easy if you get a new one so you can see what it looks like. From what you described It sure sounds like the resistor.