HVAC Fan Acting Weird??

[78mc-bbc]

So i get in the truck this morning and the fan is blowing on medium or low, but the switch is in the off position. So i try the other speed and they work except for the first mark after the low setting, that turns the fan off?? High does work and the rest, it just seems that the off position and the low 1 position have traded places.

Any ideas???

 

[SunlitComet]

Replace your fan switch and inspect and repair any elctrical or heat damage to its pigtail connector.

 

[78mc-bbc]

im going to snag one from the junk yard this weekend and give it a shot thanks

 

[Earl33]

Replace your fan switch and inspect and repair any elctrical or heat damage to its pigtail connector.

Having trouble with my fan not working in 1 and 2 but works in 3, 4 and 5. Stopped this Morning at the local junk yard for a switch. They were out and had a guy Sat. come in looking for one. He stated to check the harness at the resistor behind the glovebox. They have been known to heat up and burn the wiring harness. I'm going to check my switch and resistor this evening. Was told this has been a common problem on the 90 models and from the sound of mine it has carried over in the 00's. I started a thread just the other day about this and will post my findings tonight.

 

[78mc-bbc]

well i replaced the resistor and its the same thing, the blower only shuts off when in low 1 position and high, the off position is now low. so my next try is going to be replacing the control panel, any suggestions??

 

[SunlitComet]

just do the fan switch first not the whole panel.

 

[78mc-bbc]

how do you do only the fan switch, i thought its all one unit

 

[WalterMitty]

I had this happen to me on a brand new control set. It turned out to be the connector on the pigtail.

 

[SunlitComet]

the fan knob pulls off and the fan switch unsnaps from the control head from the rear.