Mechanics

WHAT DOES THE CODE PO645 MEAN - THE A/C CLUTCH RELAY CIRCUIT IS OPEN OR SHORTED?

1999 Chrysler Sebring • 158 miles

What is the a/c clutch relay circuit? Code PO645 on a 1999 chrysler sebring lxi
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SKsilver
October 6, 2012.



The computer is trying to complete the command to turn on the ac and it cannot as it does not see a signal to ground.

The circuit has to be checked as to why there is no signal to the pcm

Roy

Thank you very much, the air and/or heat hasn't been coming out of the vents very well. And a year ago it was looked at by a mechanic who said it just needed cleaned out, but the problem restarted about 6 months later. Thank you again.

Tiny
SKsilver
Oct 6, 2012.
Would that relay cause the air or heat to not come out the vents very well? Or maybe it just needs recleaned again?

Tiny
SKsilver
Oct 6, 2012.
No, that could be the blower motor itself.

Roy

Thank you.

Tiny
SKsilver
Oct 7, 2012.