Need some assistance with A/C

[EnergyFX]

I have a '97 Tahoe, recently the fan for the Air Conditioning/Heater has quit working for various periods of time.  Sometimes it will quit for a few minutes, other times it will quit for days.  It always ends up comming back on though.

 

There have also been a couple of instances where the fan will come on but air will not blow out of the dash vents.  I can tell that the air gets diverted within the ducts but it is like the door that opens the path to the dash vents gets stuck closed.

 

Not sure if this would be related to the A/C fan or not, but the windshield wipers have also had a couple of instances where they stopped working for a few seconds at a time.

 

As for the Fan and Wipers, I am figuring it is a faulty relay somewhere, but I have no idea where to even look for it.

 

As for the door in the ductwork... I have a feeling there isn't going to be an easy fix to that, but I am seeking anyone elses experience before I go tear the dash apart on a gremlin hunt.

[Wingnut]

The wipers are most likely caused by the control board that is located inside the wiper motor housing. (drivers side firewall).

 

Call your stealership, they should fix it without charging, it's a recall thing.

 

Can't help you with the AC. Sorry. The blower motor isn't that bad to replace on a 92. Don't know about a 97 though.