I turn overdrive off, but it keeps coming back on.
Senior Member
Joined: Oct 2004
Posts: 2,597
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Originally Posted by Tbird69
This isn't quite true, there's a temp cutoff switch that prevents the system from running below a certain temperature. Usually around -7 to -10C, if it ran at temps below that the system would ice up. It also only runs when set to full defrost or to floor/defrost.
There is no factory designed setting for making sure the seals stay supple.
It is a side effect from the system working to remove moisture.
And it’s a good thing, as lots of guys would never run their A/C the few minutes a month it needs to keep the seals alive.
Guys who live where they never need defrost have to remember to use the A/C a few minutes every month or they experience premature seal death.
Chris
Senior Member
Joined: Nov 2005
Posts: 129
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From: Brandon, MS
I have to remember to hit the O/D button and the rear sensor off buttons everytime I jump into my truck when I pull a trailer in town. I so use to pushing the first button from the previous vehicle, that hitting both when cranking up is almost second nature for me. Don't worry, you will eventually get use to it. In a way, I'm glad that they automatically default back to on when I crank up.
