Hi.
Peterbilt just did a warranty replacement on the AC compressor and now the AC works great while sitting still and only sort of lukewarm while driving.
They are blaming it on the blend door actuator but it doesnt sound like that kind of problem to me, unless I'm wrong.
What would cause the AC to work great while sitting still and so, so while driving?
Thank you
AC works best when sitting still.
Discussion in 'Ask An Owner Operator' started by Edjahman, Nov 3, 2018.
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snowman_w900, shogun and Edjahman Thank this.
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Thank you.86mechanic Thanks this. -
Blend door actuator would only come into play when changing the temp settings from hot to cold or vice versa. If its overcharged it will be cycling every few seconds.
Edjahman, snowman_w900 and 86mechanic Thank this. -
My vote is undercharged.
You've got enough to make it work at idle. But not enough for higher air flow through condensor and higher engine speed when driving. Which will impact high pressure readings.
How often does the radiator fan cycle off and on? It'll be alot if overcharged. Not so much if under.Edjahman, snowman_w900 and shogun Thank this. -
The question I have is why did they replace the compressor?
Edjahman Thanks this. -
Edjahman, snowman_w900 and snowwy Thank this.
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This repair was not done correctly.
Need to have the system checked.Edjahman Thanks this. -
The compressor was a warranty replacement from Paccar. The old one Failed after two and a half months.
I'll just have to get it checked again, obviously.
The fan cycles at a normal interval while fast idling. It doesn't cycle much while driving if at all.
Thank you for your replies.
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