Can a GM blower control switch be replaced?

This is no cause for concern since the circuit descriptions are the same for all of the GM vehicles covered by this repair tutorial. You don’t have to buy the whole A/C-Heater Control Panel to replace the blower control switch since the switch is removable. You can find the blower switch just about in anywhere.

Why is my blower control switch not working?

If continuity is not present where indicated in the test steps above and this lack of continuity coincides with the blower fan speed that’s not working on your pickup or SUV, then you’ve found the cause of the problem. Replace the blower switch in the A/C-Heater control panel with a new one to solve the problem.

What should I do if my GM fan won’t turn on?

Pull the negative battery cable and re-install, making sure it is very tight (also check the positive to make sure it is tight). See if this fixes the problem. Many of GM’s AC control heads have a built in reset feature that when power is removed and then applied it will go through a cycle that activates all the vent doors and mode doors.

What causes a heater control valve to stop working?

The mechanical unit can leak coolant or the vacuum diaphragm can rupture causing a vacuum leak which will stop control valve operation. The cooling system is pressurized so a coolant leak at the control valve can cause the coolant level to become very low and cause the engine to overheat. Loading…

What are common reasons my GMC Safari has heater problems?

What are common reasons my GMC Safari has heater problems? While there are a variety of reasons your GMC Safari heater is not working, the most common 3 are a broken heater blower motor, a problem with the thermostat, or a failed heater blower motor resistor. See what others are asking about their GMC Safari.

When to replace the heater fan control switch?

If you have replaced the blower motor and blower motor resistor on your ’95-’98 GM truck or SUV, and your fan only works on high or doesn’t turn on at all, your heater fan control switch needs to be replaced. This video explains on how to do replace this part. Thanks for watching. Loading…

What to do if your Ford Fusion heater is not working?

When the blower motor resistor fails, the air conditioner and heater may still work, but air may blow from the vents at only some of the fan speed settings. If the resistor isn…

What does the control switch on the blower do?

What this means in plain English is that as you turn the blower fan speed knob from OFF to any of the fan speeds (LO, M1, M2, and HI), the blower switch mechanically opens and closes the two contacts necessary to divert the incoming battery power (from circuit G) to the different circuits that’ll get the blower fan speed you’re choosing.

Can a blower switch be replaced in an A / C heater?

Replace the blower switch in the A/C-Heater control panel with a new one to solve the problem. To comparison shop for the blower control switch, take a look at this section here: Where To Buy The Blower Switch And Save. CASE 2: All circuits tested had continuity where indicated in the test steps.

How to test the blower motor resistor ( GM 4.3L )?

How To Test The Blower Motor Resistor (GM 4.3L, 5.0L, 5.7L). How To Test The Blower Motor (GM 4.3L, 5.0L, 5.7L). In a nutshell, the blower switch interrupts and diverts the electrical current from one contact to another.

Where can I buy a blower control 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. You can find the blower switch just about in anywhere. The best place to buy it, to save a few bucks, is online.

How can I test the blower control switch?

One is to do a multimeter continuity test of the specific circuits that should be ‘closed’ when you turn the dial to the different blower motor speeds. The other, explained in TEST 2, is to bypass the blower switch and indirectly test the blower switch.