A/C Compressor Clutch Cycles?

Skandocious · Jul 17, 2009

Is the A/C compressor clutch supposed to engage and disengage intermittently when the A/C is turned off? I mean to say-- the A/C is turned off, is it normal for the clutch to engage itself for a matter of, say, 5-10 seconds and then disengage?

flareside_thunder · Jul 17, 2009

uhhh don't think so........

NeXtras · Jul 17, 2009

of its on defrost yet, or mix.. but if the none of those are on, and the A/C is off, that clutch should not engage

Skandocious · Jul 17, 2009

Switch is in the off position. I was told by someone else that theirs does it sporadically when the switch is in the off position. He said it does it to keep pressure in the system.

Not saying he's correct-- but it appears that mine was doing this earlier so I'm just curious.

TexasNomad · Jul 17, 2009

My rangers Ac compressor engages when i'm running the heater :suspicious:

ever one tells me thats normal..

radialarm · Jul 17, 2009

Mine doesn't!!!

Maybe you got a computer glitch!!!

Raptor22 · Jul 17, 2009

Interesting. My AC compressor isnt hooked up so I wouldnt know, but have you even left yet?

:

F 150Cobra · Jul 17, 2009

my old F250 did not do this niether the Inline six 1989 !! maybe there is something wrong with one of the electronics of the A/C

TexasNomad · Jul 18, 2009

radialarm said:
Mine doesn't!!!

Maybe you got a computer glitch!!!

Well according to the ford techs on this very forum its normal for it to do that...
So I dunno.

m78 · Jul 18, 2009

I believe they're made to cycle now and then to keep the compressor lubricated , but not that often.

NeXtras · Jul 18, 2009

no, unless the switch is in Norm A/C, Max A/C, Mix, or Def, the compressor should be off!

They dont spin on occasion for anything unless theres power to the compressor..

ill tell you this, last year my compressor was very low on r134, so it binded up when i hit the switch for ac, would bind and stall the engine... with that said, theres no way the compressor kicks on when not asked to, or else my truck would have been in a world of hurt lol

Jakes40 · Jul 18, 2009

91 f-250 diesel mine was doing it to.

polarbear · Jul 18, 2009

NeXtras said:
no, unless the switch is in Norm A/C, Max A/C, Mix, or Def, the compressor should be off!

They dont spin on occasion for anything unless theres power to the compressor..

ill tell you this, last year my compressor was very low on r134, so it binded up when i hit the switch for ac, would bind and stall the engine... with that said, theres no way the compressor kicks on when not asked to, or else my truck would have been in a world of hurt lol

NeXtras · Jul 18, 2009

as you can see, the switch has to be in a specific position for it to relay to the compressor, yes some is vaccum controlled, BUT, if you had a vaccum leak, it would DISENGAGE the compressor clutch..

so really the only possible way would be TOO MUCH vaccum.. which i have no idea how trucks would do that

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A/C Compressor Clutch Cycles?

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