What would cause the heater fan inside the car to run after the car is shut off and the electronic control turned off in a 92 Bonneville?

1. Why does my blower motor stay on when car is off?
2. What happens when blower motor relay goes bad?
3. Why does my car heater not turn off?
4. How do I know if I need a blower motor or a resistor?
5. What is blower resistor?
6. Why will a blower run on the on position and not on auto?
7. Where is the blower fuse located?
8. Where is the heater blower motor relay located?
9. Where is the blower motor relay located?
10. Is there a fuse for the heater blower?

Why does my blower motor stay on when car is off?

So car makers switched to pulse width modulation (PWM) to control the blower fan speeds. It's really a simple concept: the blower motor controller pulses either the power or the ground circuit on and off depending on which fan setting you choose.

What happens when blower motor relay goes bad?

If you have a faulty blower motor, you may experience low airflow from the vents, even when the fan is on high. There will be no air coming from the vents if your fan isn't working due to a bad blower motor resistor.

Why does my car heater not turn off?

A heater can stop working for a number of reasons, including: A low antifreeze/water level in the radiator due to a leak in the cooling system. A bad thermostat that isn't allowing the engine to properly warm up. A blower fan that isn't working properly.

How do I know if I need a blower motor or a resistor?

Typically, if the fan will work on some speeds but not on others, the resistor is suspect. Okay, let's say there's no melting going on, but your fan doesn't work on all speeds. Typically, if the fan will work on some speeds but not on others, the resistor is suspect.

What is blower resistor?

The blower motor resistor is responsible for controlling the blower motor speed. ... The change in resistance controls the current through the blower motor, which in turn limits the speed that the blower motor spins at.

Why will a blower run on the on position and not on auto?

Other Blower Fan Won't Run Problems

The fan will run and blow warm air but only in FAN or FAN ON mode - delivering heat - but NOT in AUTO mode. This is a bad temperature sensor in the unit; replace the fan limit controller.

Where is the blower fuse located?

Many vehicles have two fuses for the blower motor, one in the interior fuse block and the other under the hood. The blower motor is usually under the dashboard on the passenger side.

Where is the heater blower motor relay located?

The blower relay is located near the front of the fuse block and is labeled "Blower." Inspect the center of the relay. If the metal rod inside is broken, the relay will need to be replaced.

Where is the blower motor relay located?

The blower motor relay is generally located in the under-hood fuse box or in the under-dash fuse box. A blown fuse can mimic relay failure.

Is there a fuse for the heater blower?

The blower motor is powered by a fuse-like device called a relay. If your heater or air conditioner does not blow air through the vents, this could indicate that the blower motor fuse has probably blown. While replacement is easy, the exact location of your blower motor fuse may vary from vehicle to vehicle.