Just a final word. It’s fixed. It was the actuator. Amazon has the dorman actuator for 18$ and I had ordered just in case. Installed yesterday and I now have heat coming from all setting that is should.
No heat in 2015 Peterbilt 579
Discussion in 'Peterbilt Forum' started by calvinbabb, Jan 8, 2022.
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RockinChair and Johnny-FlipFlop Thank this.
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Just to update yall on my situation.
I replaced the blend door actuator and still didn’t get any significant heat on 84f setting. I’m starting to think that it’s the actual controls/knobs that are the culprit.
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