Is there a way to turn off the blower motor?
Is there a way to turn off the blower motor?
My blower/heater motor switch will not turn off the blower nor willl it change the motor speed. It’s currently stick on high. Even if I turn the engine off and take out the keys the blower is still running. I had to discoinnect the battery to get it to stop.
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.
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.
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.
My blower/heater motor switch will not turn off the blower nor willl it change the motor speed. It’s currently stick on high. Even if I turn the engine off and take out the keys the blower is still running. I had to discoinnect the battery to get it to stop.
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.
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.
Why does my blower motor keep running high?
More than likely you have a control processor issue, which is basically the resistor. The HVAC control module is to send the speed control signal to the processor which then changes the fan speed. When this shorts it usually puts the fan to high speed.
What to do if your climate controlled blower wont shut off?
If your climate controlled blower processor is shot, be prepared to spend mucho bucks for a replacement. But before you start throwing expensive parts at the problem, you’ll have to do some checking. Start by testing the gray/black wire at the blower motor control processor. First, try grounding the wire. Then try removing it.
Where is the relay on a blower motor?
That relay should be in the under hood fuse/relay box (under hood, left side, behind battery). Starting with the high speed relay, pull it out and see if the fan turns off. Replace the one that causes the fan to go off when removed. I have attached images to help you.
