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.
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 are the symptoms of a bad blower motor relay?
3. Melted relay. Another more serious symptom of a problem with the blower motor relay is a burned or melted relay. Relays are exposed to high current loads and can sometimes get hot when they develop problems.
What kind of blower motor does a 2004 Grand Cherokee have?
2004 grand Cherokee limited v8 4.7 here. blower motor (sensor) replaced last month (Not OEM part) due to A whisper of hot and cold air only. The cold and hot air is coming out now but not nearly enough like before to cool entire interior. Have to keep fan on high just to feel slightly comfortable in driver seat.
Why is my Jeep Grand Cherokee heater not turning off?
The heater blower is stuck on in the high position on my 2005 jeep grand cherokee and will not turn off unless the igniton is turned off or the fuse is removed. I had it checked out and was told i needed a new blower motor resistor as well as a new blower motor.
What causes the blower motor to go out on a jeep?
The resistor is the most common part that goes out. You can check the blower motor by running a separate power line to it, it should run full blast when you do this. 28 people found this helpful.
Why is there no air in my Jeep Grand Cherokee?
Found broken vacuum hose under battery platform going into reservoir, replaced that (my cruise control started working). Cleared check valve in vacuum line near firewall, got a bit of air blowing but still not enough. Finally after reading your idea here, pulled the blower motor to check direction of flow.