‘99 AC stopped working

[Big T]

AC stopped working. Checked fuses on side of dash and they are good. The dash HVAC switch panel is new and has been working. The variable speed control was not ahowing much change between Low and Hi, but Hi was working full on.

Could this be the resistor going out?

 

[MrMarty51]

I believe that You have made the correct assumption.
If the AC still blows cold with the blower on high then I too believe it is the resistor.

 

[Big T]

I believe that You have made the correct assumption.
If the AC still blows cold with the blower on high then I too believe it is the resistor.

Blower motor no longer blows at all. It was cutting in and out at the speeds less than Hi. Now I get nothing.

 

[MrMarty51]

Blower motor no longer blows at all. It was cutting in and out at the speeds less than Hi. Now I get nothing.

Oh My. Yeah, pull that resistor and check the wires and terminal plug.
Might too believe that the plug at the blower motor might be burning out.
IKN about testing at the resistor.
I imagine there should be power at at least one of them wires.

 

[Big T]

I just ordered a GM Genuine blower resistor off Amazon. Pretty sure it’s the resistor based on the middle speeds going off and on prior to the sudden no work at all this am.

 

[ak diesel driver]

It's the power wire going to the blower motor. The plug is a common fail point

 

[Big T]

It's the power wire going to the blower motor. The plug is a common fail point

I’ve replaced that plug before. Also the resistor.