Carrier Ultima 08 reefer P 164 fault code

Discussion in 'Refrigerated Trucking Forum' started by Daniel72761, Dec 22, 2022.

  1. Daniel72761

    Daniel72761 Bobtail Member

    Dec 22, 2022
    Replaced compressor on carrier Ultima 08 reefer. Runs, cools, heats fine. Problem is gets a p164 fault on the pretrip. Its been at the shop for weeks because they don't have the time to figure it out. Put new unloader in but didn't replace coil. Checked wiring to coil didn't find anything. At this point I bought a new coil and am going to replace myself. Is there anything else that I am missing?
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  3. reeferwrencher

    reeferwrencher Medium Load Member

    Aug 4, 2018
    Is there continuity through the rear unloader?
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