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  1. #1
    Join Date
    Aug 2006
    Posts
    442

    Split heat pump problem

    See if anybody has ran into the particular problem below. I have twice. 10-12 year old Coleman split heat pump. Heat mode cuts out on high pressure in about 30 seconds. Cool mode pressures are normal for a 60degree day. No refrigerant has been added to either system since installation. Basically have to add R-22 for A/C mode and remove in the winter time. Sounds like an airflow issue due to extremely high head pressure in the winter time. If I recover freon to decent heat mode pressures when I switch to cool mode pressures way too low. Bad part is nothing has changed at Air Handler on either system. Filter is clean, Indoor coil is clean, Blower wheel cups are clean. Kinda tricky. A couple of people have mention metering device problem but I dont see it. Any suggestions??????????

  2. #2
    Join Date
    Dec 2006
    Location
    Fayetteville,Arkansas
    Posts
    1,427
    Sounds like the outdoor TXV. Had one last month on a rheem same thing you are describing. Changed txv and all systems go.

  3. #3
    Join Date
    Aug 2006
    Posts
    442
    Appreciate it hvaclogic. The only thing that gets me is the suction pressure is about normal. If the outdoor metering device is the problem pressure should be low. I think its just a orifice and distributor tube in outdoor unit.

  4. #4
    Join Date
    May 2006
    Location
    east central indiana
    Posts
    1,117
    Is the indoor section on a trailer home or in a stickbuilt application?

    What have you done to verify that airflow is correct?

  5. #5
    Join Date
    May 2006
    Location
    east central indiana
    Posts
    1,117

    remember

    Refrigerant only flows thru the piston one way.

    That's all I got to say about that.

  6. #6
    Join Date
    Aug 2006
    Posts
    442
    Mobile home installion on one and house on the other.

  7. #7
    Join Date
    Dec 2006
    Location
    Fayetteville,Arkansas
    Posts
    1,427
    After you change the txv let us know how system is doing.

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