What causes a blower motor to run without the ignition?
When the fan switch moves to any speed it energizes the coil in the relay which closes the contacts in the relay. So the power has to run from the fuse, thru contacts in the relay, thru the speed switch, to the resistor module. So if the contacts in the relay were stuck, turning the fan speed switch to off should cut power to the resistor module.
What happens when you pull the ignition key on a blower?
When it goes, the blower will run continuously unless you pull the fuse. You’ll need to check the schematic for your car to see what is in that circuit, but the module or relay would be the best guess. In the meantime, pull the fuse. It is the heater/AC blower. It continues to run with the key out of the ignition.
Why does my AC blower run with the key out?
In the meantime, pull the fuse. It is the heater/AC blower. It continues to run with the key out of the ignition. And I checked the radio as well, that does not appear to work with the key out.
Can a blower motor controller keep running after you shut down the engine?
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. How a blower motor controller differs from a blower motor resistor?
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.
When it goes, the blower will run continuously unless you pull the fuse. You’ll need to check the schematic for your car to see what is in that circuit, but the module or relay would be the best guess. In the meantime, pull the fuse. It is the heater/AC blower. It continues to run with the key out of the ignition.
In the meantime, pull the fuse. It is the heater/AC blower. It continues to run with the key out of the ignition. And I checked the radio as well, that does not appear to work with the key out.
How often is the blower motor on when ignition is off?
The fan will blow for 15 minutes at half speed with the air directed to the dashboard air outlets. Make sure the customer is informed of this new function. Ambient temp greater than 75°F (24°C) when engine is turned off. Runs only one time every 20 hrs.
When the fan switch moves to any speed it energizes the coil in the relay which closes the contacts in the relay. So the power has to run from the fuse, thru contacts in the relay, thru the speed switch, to the resistor module. So if the contacts in the relay were stuck, turning the fan speed switch to off should cut power to the resistor module.
Is there a high speed blower motor relay?
There may be a relay that, when the blower contol is set to high, directs current directly from the battery to the blower motor. That was the way my 1978 Oldsmobile Cutlass was wired. If this is the case, you need a new high speed blower relay.