Ac problem

Discussion in 'Trucks [ Eighteen Wheelers ]' started by Xavier jackson, May 28, 2016.

  1. Xavier jackson

    Xavier jackson Bobtail Member

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    May 15, 2016
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    I have a fld classic 2000 with a sanden compressor and i have freon coming out relief valve on back of compressor. Old one lock up so I replace dryer front expansion valve and compressor. Before it lock up it was working fine now I'm clueless
     
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  3. KeithT1967

    KeithT1967 Road Train Member

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    Nov 12, 2008
    Springfield, Ohio
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    Its blowing out the back because thr pressure is too high. Did you replace the condensor at the same time? Did you have the system vacced and recharged? Orrrr Did you simply replace the compressor and try to charge it yourself....

    I'm guilty of the last.... shame on me.
     
  4. Xavier jackson

    Xavier jackson Bobtail Member

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    May 15, 2016
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    I had it vacum down ,and i did not replace condenser
     
  5. 062

    062 Road Train Member

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    Does the fan cycle on and off?
     
  6. Xavier jackson

    Xavier jackson Bobtail Member

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    May 15, 2016
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    No only a/c click on and off
     
  7. 062

    062 Road Train Member

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    Your fan should cycle on and off with head pressure. Could be bad high pressure switch,fan switch.
     
  8. Xavier jackson

    Xavier jackson Bobtail Member

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    May 15, 2016
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    I changed the high pressure switch on dryer and nothing. Got to find other switch. Shop say there must be a blockage some where because high side didn't look right on gauges
     
  9. 062

    062 Road Train Member

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    Make sure you hooked the lines to the right ports on the compressor. Not trying to be funny,I've seen it happen
     
  10. KeithT1967

    KeithT1967 Road Train Member

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    The blockage is in the condensor. When your compressor failed it plugged the condensor. Change it. Flush the lines. Vac and charge.
     
    lilillill Thanks this.
  11. Xavier jackson

    Xavier jackson Bobtail Member

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    May 15, 2016
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