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Heat Pump Cooling Not Working

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Comments

  • heatingrabbit
    heatingrabbit Member Posts: 37

    Just found that somehow, the compressor now can start. I can see the amp draw when start and current is stable at ~5A while running.

    However the pipe is not cold yet will verify a bit further after work.

    1000039198.jpg
  • HVACNUT
    HVACNUT Member Posts: 6,963
    https://forum.heatinghelp.com/discussion/comment/1862206#Comment_1862206

    You're pretty much right there. The reading across Run and Start should be roughly the sum of the other 2 readings. Should be 3.5. Actual is 3.7. I like it. 👍

    Try a Hard Start Capacitor/Relay.

  • heatingrabbit
    heatingrabbit Member Posts: 37
    edited August 12

    Now that my compressor is running.

    I compare the running currency of the working unit vs not cooling unit. 6.6A vs 5.9A. Slightly lower indicating the compressor is not working as hard as it should be?

    pic 1.jpg pic 2.jpg

    Opening up the outdoor unit a bit more. Suction side is only slightly cold (not cold enough comparing with working unit). I use my hand to feel the temperature of other lines in the outdoor unit and mark in the picture. The air blown out by the fan is not that warm (comparing with working unit).

    Does this mean the system is working, but not as well as it should be? Indicating low on refrigerant?

    pic 3.jpg
  • 109A_5
    109A_5 Member Posts: 2,612

    With the outdoor unit running, what's going on with the indoor unit (the evaporator and the blower). The "Very Hot" on the compressor output means the compressor is doing something. At this point the refrigerant charge should be verified.

    National - U.S. Gas Boiler 45+ Years Old
    Steam 300 SQ. FT. - EDR 347
    One Pipe System
  • Steamhead
    Steamhead Member Posts: 17,941

    @heatingrabbit , time to call a pro.

    All Steamed Up, Inc.
    Towson, MD, USA
    Steam, Vapor & Hot-Water Heating Specialists
    Oil & Gas Burner Service
    Consulting
    heatingrabbit
  • heatingrabbit
    heatingrabbit Member Posts: 37
    https://forum.heatinghelp.com/discussion/comment/1862303#Comment_1862303

    I check the manual the unit is using R22 refrigerant, only licensed person can handle it. Plan to call HVAC specialist.

  • 109A_5
    109A_5 Member Posts: 2,612

    I would agree R-22.

    image.png
    National - U.S. Gas Boiler 45+ Years Old
    Steam 300 SQ. FT. - EDR 347
    One Pipe System
  • heatingrabbit
    heatingrabbit Member Posts: 37

    HVAC company come and check the charge. There is no r22 left in the system.

    However they don't recharge r22 anymore and can only install a new system with new refrigerant.

    Seems not something fixable as r22 was phased out?

  • EBEBRATT-Ed
    EBEBRATT-Ed Member Posts: 18,426

    Start components (cap and relay) are optional

    Most all units have no pressure switches

    If you get ohm readings between common-start and common-run on compressor these two readings should add up to the start-run reading (approximately)

    Then if the compressor motor is not hot to touch and you have no readings from common or start or run to ground the compressor should start

  • HVACNUT
    HVACNUT Member Posts: 6,963
    https://forum.heatinghelp.com/discussion/comment/1862619#Comment_1862619

    Done is done. The question now is, will the new system be 454B or R32?

  • 109A_5
    109A_5 Member Posts: 2,612
    edited August 18

    Some folks are still doing R-22 work.

    R22 Trane AC leaking patch spine fin coil

    https://youtu.be/savoy7EBQ1E
    National - U.S. Gas Boiler 45+ Years Old
    Steam 300 SQ. FT. - EDR 347
    One Pipe System
  • EBEBRATT-Ed
    EBEBRATT-Ed Member Posts: 18,426

    There are R-R-22 replacements but if the system is old its time to go.

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