A few things come to mind. Unplugged/broken vacuum line; Bad control panel switches; Bad vacuum actuator someplace; Plugged up with outside stuff like leaves.
The blower motor will operate when the key is in run regardless of whether the motor is running. The AC itself is not operating as the compressor is turned by the motor.
Probably the blower motor, wiring to it or control switch
If the heater blower has humming noise when motor is running, first check its capacitor. If the capacitor is fine, then the motor is the problem and may need to be replaced.
on a 1990 cadallic sedan de ville after you cut the car off the blower keeps running killing the battery
A blower motor that only works on high is normally caused by a defective Blower Motor Resistor Pack. DRL, do not have a clue.
Defective Blower Motor Resistor Pack. Replace it.
turbo blower is an equipment where a turbine is attached with the blower part. steam enters through the turbine inlet and expands through the blades and goes to the outlet which helps the turbine shafts to rotate. this turbine shaft is attached with the shaft of blower that makes the blower rotating.
most likely a defective blower module under the hood
The blower motor circulates the air through the system.
When that happens on a Chrysler Town and Country with auto temperature, the blower motor power module has failed. It is also called a blower motor resistor.
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.
If you are refering to the inducer motor( the one with the little wheel that you see when you take your units doors off) Yes it should keep running when your blower motor is running and before ignition to create your draft and during to rid the gases out your flue Hope I kept it simple