Blower level switch

[RedD250]

Good afternoon everyone, and happy friday! Quick question about the Heat/AC blower switch. Here lately, when I have the blower in high, it will sometimes just stop. If I move the switch down slightly, not quite to the next detent, it'll start blowing again. The 3 positions below high all work just fine. Is this likely just the control switch? If so, is it possible to replace just that, or do I need the entire HVAC control panel? Anybody got a link to the part, or am I going to be looking on eBay for a good used one? Thanks!

 

[Topzide]

If it is an electrical contact type switch, have you tried a "good contact cleaner"? DeoxIt is my go to cleaner. You've got all types of "crap" that gets it there over the years!

 

[RedD250]

If it is an electrical contact type switch, have you tried a "good contact cleaner"? DeoxIt is my go to cleaner. You've got all types of "crap" that gets it there over the years!

That seems to be the answer I'm getting everywhere else lol. I know on squarebody Chevy/GMC trucks, the blower switch itself goes bad, just assumed that was the problem here too. Hopefully it's just crud stuck in there. I'm just dreading pulling the dash out again. Wanted to make sure there wasn't any common problem with the switch before I did it.

 

[brucejohnson]

Does it look like this one?

Standard Motor Products HS203 HVAC Blower Control Switch | Autoplicity

My experience with the older trucks was the high current draw would arc and heat the contacts causing pitting and carbon buildup. Check the plug on the switch, too. Sometimes they got a little melted from prolonged heat running on high, especially when the motor gets a little old and tight to turn, drawing more current. That can also overheat the resistor block.

 

[RedD250]

Does it look like this one?

Standard Motor Products HS203 HVAC Blower Control Switch | Autoplicity

My experience with the older trucks was the high current draw would arc and heat the contacts causing pitting and carbon buildup. Check the plug on the switch, too. Sometimes they got a little melted from prolonged heat running on high, especially when the motor gets a little old and tight to turn, drawing more current. That can also overheat the resistor block.

Yup, that's it. I found a writeup in one of the first gen groups on facebook about how to put the high position on a relay while retaining stock appearance and functionality. Looks like I might be doing that. Hopefully I can salvage my original switch, but thank you for the link to that one.