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  1. #1
    Join Date
    Mar 2005
    Posts
    5
    I'm troubleshooting a RHEEM packaged heat pump, 13 years old. There is no control voltage coming into the t-stat. The outdoor unit breaker has power. Is the control transformer the likely culprit?

  2. #2
    Join Date
    Mar 2004
    Location
    Grottoes VA
    Posts
    5,856
    You will need a little more training, IMHO.

    There could be a lot of differnt things that could be happening.
    Karst means cave. So, I search for caves.

  3. #3
    Join Date
    Jan 2004
    Location
    Lancaster PA
    Posts
    67,907
    If you know how to use a meter to check the line voltage, you should know how to use it for low voltage testing.

    This is a rather basic problem, if your having trouble with it, you need alot more training.
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  4. #4
    Join Date
    Jan 2004
    Location
    Lancaster PA
    Posts
    67,907
    Originally posted by beenthere
    If you know how to use a meter to check the line voltage, you should know how to use it for low voltage testing.

    This is a rather basic problem, if your having trouble with it, you need alot more training.
    Hint: not all units have a common at the stat.
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  5. #5
    If you suspect that the xrfrmr has failed , go right to the xfrmr and check the primary and secondary voltage,don't leave things in doubt, you will end up going in circles with no clear path to determine what the real problem is.

  6. #6
    Originally posted by brucew
    I'm troubleshooting a RHEEM packaged heat pump, 13 years old. There is no control voltage coming into the t-stat. The outdoor unit breaker has power. Is the control transformer the likely culprit?
    Sorry bruce, Site rules prohibit us from giving you step by step instructions on how to fix your unit. Your best bet would be to utilize the services of a pro.

  7. #7
    Join Date
    Dec 2002
    Location
    Toledo, Ohio, United States
    Posts
    12,910
    huh? help the guy out he's a pro member afterall.
    No Heat No Cool You need Action Fast

  8. #8
    Join Date
    Jan 2005
    Location
    daytona florida
    Posts
    76
    huh? help the guy out he's a pro member afterall




    and should know what he is doing

  9. #9
    Join Date
    Feb 2003
    Location
    South Carolina
    Posts
    1,333
    eddy breaking the rules again

  10. #10
    Join Date
    Sep 2001
    Location
    East Stroudsburg, PA
    Posts
    13,215
    Originally posted by dmoneyc22
    huh? help the guy out he's a pro member afterall




    and should know what he is doing
    Profile says he's a "mechanical engineer".

    Question asked is DIY'er. Basic electrical 101.

    Sounds like another phony "professional member" slipped under the radar....

    Email being dispatched in 3-2-1...

  11. #11
    Join Date
    Mar 2005
    Location
    Suppy NC
    Posts
    4,513
    if you have no 24 volts at the t stat
    then trasformer is probably the reason
    if the transformer is bad there is a reason and changing it will most likely waist the new one two
    something has most likely shorted out and taken the trans. out with it.
    if you are sure of yourself and ask a question of this nature then i would sugest you call one of your coworkers and see if he can help you out on this. heatpumps have a lot of controls and if you are not use to working on them you will go nuts. all i can say in here is 95% of the time a transformer does not just go bad something has burnt it out
    get some help before you go any farther with this
    some units have more then one power sorce comeing into it
    so get some help before you go farther

  12. #12
    Join Date
    Dec 2002
    Location
    Toledo, Ohio, United States
    Posts
    12,910
    if you have no 24 volts at the t stat
    then trasformer is probably the reason



    Sounds like You've solved his problem. I wonder how you check for 24volts if there is no common. I guess if your leads on your meter are long enough you can get to a water pipe somewhere in the house. But what if the water pipes are pvc. Run a common up to the stat,,,what was I thinkin.
    No Heat No Cool You need Action Fast

  13. #13
    Join Date
    Mar 2005
    Location
    Suppy NC
    Posts
    4,513
    twilli3967
    probably and if is not solveing anything
    get some help before you go further is what i was saying
    guess i shoud have said maybe or maybe not get so help in stead of telling him why he should get so help
    thanks and i will word things better next time

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