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Chevy 4.3 V6
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Posted by: KXTodd---------------------
I've got a 02' S10 with the 4.3 and trying to figure out why the AC cycles on and off even in freezing weather? The switch is off and I get heat but it still cycles and I can feel the hoses and evaporator? freezing up like it's running?
Posted by: G. Gearloose---------------------
If the defroster is on at all, the AC will cycle no matter the temperature to reduce the humidity. Perhaps thats it.
Posted by: KXTodd---------------------
That's what someone else just told me too, must be it. It is loud though and makes you think theres something wrong with the front end, constantly clicking!
Posted by: splatt---------------------
My 85 Chev full size does this too.
Steve
Posted by: TOFAS4YOU---------------------
WHEN IN DEFROST MODE A/C CYCLES ON AND OFF THATS THE WAY IT WORKS
Posted by: XRpredator---------------------
the A/C always cycles. If it didn't, it would probably freeze up and not work at all when you need it.
Posted by: Highbeam---------------------
On my 98 chevy with the 5.7, the pump will cycle when the hvac controls point to anything with the defrost icon even with the blower off. I was paranoid that I was loosing mileage and didn't like the noise so I always kept the selector in the floor/vent position. No a/c cycling at all, silence again. Most folks recommend running the a/c occasionaly to keep it lubed and the juices flowing, we're talking once a month for 15 minutes.
Your truck is operating correctly.
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