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Hi everyone, still trying to find an answer to this I think common problem on my 89 TC. Under acceleration, I lose the ac and panel settings on the climate control. I end up with heat and defrost until the engine comes back down in rpms. I think im losing vacuum on the accuators or what have...

Hi Is anyone familiar with the loss of vacuum affecting the air conditioning? When I accelerate with the ac on, it changes over to heat and defrost.

hi can anyone tell me how to fix my ac? The problem is that when I put the engine under load such as going up hill, the ac will switch over to heat and defrost. It seems its a vacuum problem but thats all I know.