89 blazer heater/ac switch problem

[mudboggink5]

I have an 89 blazer k5 that i purchased a couple of months ago. I noticed when i turned the heat or ac on, It would not work on the low setting or the middle setting, but when i put on high it blows out as it should. i drove it to work the other day and i had the heat on low and noticed it worked, so than i tryed the other settings and it worked also, so i figured it was fine. i left work and tryed it again, and the same thing, it would only blow out high. I'm thinking its a bad switch or the blower motor, did anyone else experiance this problem.

 

[southernspeed]

I have an 89 blazer k5 that i purchased a couple of months ago. I noticed when i turned the heat or ac on, It would not work on the low setting or the middle setting, but when i put on high it blows out as it should. i drove it to work the other day and i had the heat on low and noticed it worked, so than i tryed the other settings and it worked also, so i figured it was fine. i left work and tryed it again, and the same thing, it would only blow out high. I'm thinking its a bad switch or the blower motor, did anyone else experiance this problem.

I had this on an old '78 but can't remember what it was exactly. It wasn't the blower. I'm thinking it was the switch but I know I also bought some other bits for it. Pretty sure that when I took the wires off the back of the switch and crossed them it worked making it the switch.
Sorry to be so vague. Old age is tough on the memory

 

[mudboggink5]

thanks, I'm going to pull the switch and see what i could find.