For three years I have had this problem. All fall, winter and spring i have no problems with my power windows. But as soon as the temperature outside gets above 80 my power windows wont work.

 

Just wondering, do they still not work even if you've got the AC blasting?

 

No ac, sadly.

 

I Googled, try this, see if the power window fuse is hot, if so the window motor winding is shorting and pulling too much current, but not enough to blow the fuse. If that's the case you need a new motor.

 

Also, you may have a corroded connector caused by rain seeping down the window glass and into the door interior, that could cause it to not work intermittently, take the door panel off and start checking things out.

 

Can you hear motor running or you get nothing at all happens ?

 

I've had to pull the plastic tube off the lower window whip mechanism, changed to 3/8ID fuel line hose, cleaned the whip with we40 and then lubed liberally with gease then the new tube over. Also lubed the steel tube of the mechanism above the motor (there is a slot on the unseen side) with PB Blaster and white lithium grease. This keeps the mechanism running smoother, and as the panel is off to gain access insure your pins entering the power control switch block are clean and the litte metal tabs engage when you reassemble the connector to the switch block. I've currently go two of the four working on my 89 and with the little vent window I think I'm ahead of the game.

 

It's not just one window not working, all four stop working when it's hot out.

 

from all door switchs or just drivers switchs

 

My jeep use to be a cop car so i only have driver switches.

 

Gotta get switchs out of panel and check for power in there easy to cleanif theres none coming out to motors...

 

Well that's just extra fun on hot days.

Try swapping the 30 amp circuit breaker in the fuse panel if you haven't already.

 

I HAVE THE FIX...

Mine do this too!!! Sometimes the power locks as well...

Soo here's how you temporaraly fix it:
Hit them.. give em a good punch. By that I mean the drivers door on a 97+

Permanant fix, take apart the main switch panel on the drivers door and clean all the contacts. The heat makes all the gunk become more gunky and clogs the contacts