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A.C. Compressor Question

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by 89Jimmy, Aug 23, 2000.

  1. 89Jimmy

    89Jimmy 1/2 ton status

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    Location:
    Northern N.Y. east end of Lake Ontario
    Got a problem with an '85 Blazer. If the ac/heater control is set anyplace but off,(Even on vent or heat), the compressor cycles constantly, about 10 seconds off,5 seconds on. Anybody know how to cure it? Thanks.
    John

    So Much to do, So LITTLE cash.
     
  2. coopertwpk

    coopertwpk 1/2 ton status

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    Location:
    Spring Valley Lake Ca.
    As for the cycling its either low on freon or the pressure switch is bad (left side of dryer)it can just unscrew it has a valve behind it.As for the lever thier is a set screw that holds the cable housing loosen and adjust it to full close a/c ,then tighten it (remove glve box its to the left on top of housing)
     
  3. Sounds like a switch in the hvac controls are going bad.
    Have your freon pressure checked.
    Hope this helps,good luck.


    IF IT AINT BIG IT AINT BAD!!!!!!
     
  4. **b**

    **b** 1/2 ton status

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    Location:
    KIllington, VT.
    a QUICK fix is (if your ac is not blowing cool air)
    is to cut the belt... because constant "Short cycling"
    will burn out your compressor... you say it works when the
    heat is on??? usually she will kick on only with the defrost from the dash or ac vent...

    when the "HEATER" is on via floor the compressor should
    not be running

    A major cause for "short cycle" is low charge....

    if thats the case ...

    Go for the 134* i think... conversion kit ...
    from what i hear its a fairly easy install
    a few O rings R12 is going for $60+ per pound...
     

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