I have a 96 t100. doesnt matter if it's on high or low it will only stay on for 5 to 10 seconds and shut off. It does this about every 30 seconds. It only does it when I'm parked or at a stop light and won't turn on at all when I'm driving. Anyone know what might be causing this?

 

Sounds like a short. Does the compressor shut off every 30 seconds or just the fan?

 

Just the fan...

 

Its possible your blower is going out then or as I stated originally could be a short somewhere. I would check you electrical.