1999 Suburban A/C help!!! Please!!!

[Togger]

OK... my AC started to go out on low, then med, then high... Now it's completely gone.... so I changed the Blower Resistor.... and no change... still nothing blowing... Now I changed the blower motor and still no AC or air blowing in....

when i turn on the AC... I hear the compressor going and it goes off when i turn it off... so I'm assuming the controls are still good....

I'm about ready to

Any ideas as to what else the problem might be?!?!?!

I also checked the AC fuse and the AC relay in the engine compartment as well.... they both are ok... (with the relay, when i pull it, the compressor stops)


Any help would be greatly appreciated!!!

Thanks!!

[J-Ri]

The A/C request switch is usually different from the fan speed switch. Check to see that you have power from the various switch positions. It's not uncommon for the switch to get burned up along with the resistors if the motor is drawing too many amps

[Togger]

I'll check them as well... Thanks J-Ri!!

[Togger]

Thanks J-Ri... you nailed the problem!! Took the climate control panel out and saw that fan switch was fried!!! Replaced the panel and everything works beautifully!!!

Thanks Again!!!

[jrbueiz]

Trying to locate the fan switch....is this it?

Original A/C Controller (Melted):


Here where looking at the Hi-Lo switch on the backside of the A/C Heater Controller itself. Is this the fan switch that you replaced to get the A/C working again?

Replacement A/C Controller I purchased from the dealer (starting to melt):


This is the 2nd A/C Heater Controller I purchased to replace the original and this one has gone bad too. As you can see it just about started to MELT. It didn't melt as bad before going bad though.

If it's getting fried....what could be frying it?

Here's a thread I started with an issue I'm having regarding my A/C Controller shorting out: THREAD