Is the blower motor fan running when off?
It should always be running at a low speed, it is designed to run on a low voltage. My 77 fan always runs when the ignition is turned on. 1975 C3 Red, T-Tops, Black Interior. All I need is time and money! Getting there! Chevrolet called it AstroVentilation. They do that. Its normal. All of them with A/C
What does it mean if your blower motor is stuck?
It sounds like you have a blower motor relay that is stuck if the system is manual and a blower motor speed control for the automatic system. Here are the locations for each and the blower motor wiring diagrams for both systems. Check out the diagrams (Below)
What should I do if my blower won’t shut off?
Refer to either the Blower Motor Control Processor Replacement or Blower Motor Processor Replacement-Auxiliary procedures in SI. After replacement of the blower motor control module, the customer may notice a slightly higher than expected blower motor speed at any of the blower speed settings.
When to replace the blower motor control module?
Important: Replace the blower motor control module if the vehicle experienced a blower motor control module failure in extremely cold ambient temperature conditions. Technicians are to replace the blower motor control module, also called the Linear Power Module (LPM), with the P/N listed below.
Why does the blower motor keep running after I Turn Off the car?
Why does the blower motor keep running after I turn off the car? If your car uses a blower motor controller, it can keep running the blower motor after you shut down the engine. Those used to be installed only on vehicles with automatic climate control with variable speed fans, but now they’re installed on many late model vehicles.
What should I do if my blower wont shut off?
If the blower stops with either of these steps, the problem is in the HVAC control module. However, if the blower continues to run at high speed with either of those tests, replace the blower motor control processor. Just as an FYI, the retail price of the blower motor control processor is $280.34.
Why does my car heater not turn off?
My car has an automatic transmission. This suggests that the relay may be supplying power to the blower motor regardless of turning the switch off. The blower motor relay supplies power to this motor when you turn the switch to “on” that can sometimes fail.
What are the downsides of a blower motor?
The downside of blower motor resistors is that, in order to reduce voltage, a resistor converts the energy into heat. These days cars can’t afford to waste that energy—there are simply too many electrical accessories to run.