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- Wed Sep 16, 2026 7:56 pm
- Forum: Automotive Air Conditioning Forum
- Topic: 1978 F150 output temperature variation
- Replies: 1
- Views: 84
1978 F150 output temperature variation
Good evening. My name is Eddie. I’m working on my 1978 F150 AC. I installed a new Classic Auto Air unit in my truck about a year ago. The temperature at my center vent varies 15 to 20 degrees as I’m driving on these hot days. My temperature goes down to 37 and up to 57 over and over. I just fixed a ...