My 123 started blowing warm air. It was the control panel. Put a new one in, and it was amazing. It was blowing the hottest air I had ever experienced. Thought I would DIE on the trip to pick up the control unit. I would check that first. Just my opinion...

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R Talley
88 BMW E32 735i (make it go away)
95 Volvo 960 "Inga" (valve problems)
95 Nissan Maxima (the indestructible)
89 Ford Ranger XLT (ugliest truck in the South)