I'm finally getting around to rounding up all the parts I need to fix my heat being stuck on hot. I noticed that most used clusters that I find are just the ones with 4 fan speeds on them. My blazer has the "auto" on the fan ****. Will a regular 4 speed fan cluster plug into my wiring? I'd never use the "auto" anyways. I just wanted to make sure I don't buy something that won't work.

well... I finally found one that looks like mine on EBAY. It looks like the wiring is totally different between the two styles. Mine just has one plug in the back for everything. Well crap!... Mine's the more expensive ones go figure..

 

Very different in terms of how things work. If you have the automatic temperature control, you must have a ATC head unit as you have discovered.

 

I went to the junkyard last weekend.but the HVAC was already pulled from all of the s10s and blazer in the yard. It's still cold where I live. So it's not too bad driving the blazer yet. I can say... At least I had heat all winter LOL! I'm just trying to get ahead on getting some of the parts so I can adjust my temp and get it to change from defrost. I'll keep looking.. because I don't want to pay $90 for a used one if I don't have to.

 

hi Closer what is your heater doing ? my 2000 blazer has the auto climate contral also had it clicks all the time even with switches off. it also turns from ac to heat and back all the time mostly heat , even when the emp switch is on the 80 side or the 60 side . if this is what yours does plz help me find out what part fixes yours and i will try the same things thanks Garry