Heater fan--not working

The speeds are controlled by a resistor pack. Changing the resistor pack may restore full functionality. Volvo heater fans are notorious for squealing. Usually they are run at a speed that doesn't squeal. If it squeals at one speed, sometimes a different speed won't squeal. The resistors seem to eventually fail. They are fairly cheap to replace.

Might be the Resistor pack located close to the blower. Could be under the dash or under the hood, but always close to the blower itself. Usually has a flat connector with 4 or 5 wires, and two small screws holding in the duct. It may be a crispy critter. It happens... The blower moves air across it to keep it cool. The blower motor may be bad as well, or possibly the fan speed switch. May very well be the fuse for the blower as well. The blower connector may be loose. Let me know what you find.

Check in the Power Distribution Box (underhood)...



Other details can find in Ford-Contour-Owners-Manual

Hope helped (remember comment and rated this).

Possible fuse, fan switch, or fan resistor pack in the airbox.

If you bypass the resistor pack and connect the motor directly to the fused 12v supply then the fan should run at maximum speed. If so, it's the resistor pack that's blown: a very common fault on a huge number of makes and models.

Have you checked the fuse? The blower fan has a resistor that controls the speed in the air box by the passengers feet. When the heater core was replaced, something could have happened to the connection or wiring. Not sure why the radio would be affected by the same thing, could be a coincidence or something dislodged under the dash. Start at the fuse and go from there.

Your fan technically only has one speed. The voltage is decreased by the use of a resistor pack to produce the slower fan speeds. If this resistor pack burns out, it will leave you with only the high setting. You can find the resistor pack located under the hood, on the passenger side on top of the fan housing.

Check fuse supplying fan is not blown,
Check blower control switch is operating OK,
Check relay controlling fan is operating OK,
Check variable speed resistor pack is not faulty (the resistor pack is usually located in the blower ducting, in the blower airflow),
Check blower motor ground connection is not missing.

blower motor or resistor or the blower motor control switch.

either blower motor resistor or blower selector switch.could be selector switch because if resistor was gone you should still have either hi or low fan speeds.