What happens if a blower motor switch breaks?
What happens if a blower motor switch breaks?
If the knob breaks, the switch may still work, however, it may be difficult or impossible to change positions on the switch if it is broken. Usually when this happens, only the plastic knob needs to be replaced, not the entire switch.
When to replace a heater blower motor switch or relay?
When the motor gets old and tired it will draw more current through the wires than a new motor. It may still draw enough current to blow the fuse after it runs for a while. In that case, a motor replacement is in order. Step 1: Disconnect the battery. Put on your safety glasses and disconnect the battery at the negative cable.
When do you Know Your heater motor switch is broken?
While there are differences from car to car, there are a few common elements to the job. Some common signs of a broken blower motor switch are if the switch only works on certain air settings, which occurs when a contact wears out, or if the switch is stuck or often gets stuck, indicating that the switch is not working properly.
What happens when you change the fuse on a blower?
If the blower works when you change the fuse, you may not be out of the woods yet. When the motor gets old and tired it will draw more current through the wires than a new motor.
Do you have to replace the blower switch?
You don’t have to buy the whole A/C-Heater Control Panel to replace the blower control switch since the switch is removable. If you’re interested in the original Ford Motorcraft blower switch or on an after-market part (and save), the following links will help you comparison shop.
What are the symptoms of a bad blower motor switch?
Another symptom of a bad or failing blower motor switch is a switch that is stuck, or frequently gets stuck. If the switch or any of its contacts becomes damaged, this may cause the switch to jam, or get stuck when you trying to change the setting.
Where does the battery go in a blower motor switch?
The BLK/ORG wire is the one that connects to terminal 2 of the blower motor switch. Inside the blower motor switch this battery power goes nowhere. Battery power is available on terminal 2 of the blower switch connector (BLK/ORG wire). This battery power is now diverted to terminal 3 of the blower switch harness connector (LT GRN/WHT wire).
How to test the blower motor switch in Ford 4.0L?
CASE 2: All circuits tested had continuity where indicated in the test steps. This is good and is the correct and expected test result that tells you that the blower fan switch (in the A/C-Heater control panel) is NOT defective. Your next step is to bypass the blower resistor using a simple jumper wire.
