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  1. #1
    Join Date
    Jul 2006
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    12
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    Have a fault code on the Heatpump-72 Thermal cutout in High stage. What would cause this? Over charged, or Under charged.

  2. #2
    Join Date
    Apr 2004
    Posts
    7,680
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    If I had to choose between the two, it would be undercharged but there are plenty of other, just as likley reasons.

  3. #3
    Join Date
    Aug 2002
    Location
    Office and warehouse in both Crystal River & New Port Richey ,FL
    Posts
    18,836
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    What's the model and serial of the outdoor unit??

  4. #4
    Join Date
    Jul 2006
    Posts
    12
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    Thread Starter
    Model 25HNA636A0030020


    [Edited by ijustneedair on 09-20-2006 at 07:27 PM]

  5. #5
    Join Date
    Nov 2006
    Posts
    40
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    Did you find a solution or an answer to this? I have the exact same unit and the exact same problem.

  6. #6
    Join Date
    Aug 2006
    Location
    Marco Island, Fl
    Posts
    758
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    It is very important to have the installing contractor come out and check the capacitors and starting componants.

    Also have them check the rectifier connections.

  7. #7
    Join Date
    Aug 2006
    Posts
    164
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    I have the same heat pump (5 ton version) and have gotten a similar fault 4 times in the one month that it has been installed. See this thread...

    http://www.hvac-talk.com/vbb/showthr...hreadid=120894

    My contractor came out to look at it and was clueless. He wants Carrier to look at it. I have been waiting for several weeks for Carrier to come out.

  8. #8
    Join Date
    Nov 2006
    Posts
    40
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    My problems with these thermal cutouts are both in the low and high stages and are becoming more frequent with many events in the same day. Last night I had 8 in a row in the low stage, and then compressor refused to work at all after that. This morning I turned evrything back on and was able to get the compressor to start without an error.

    The other day my 10kw electric heater failed with an error that told me that the heater size was invalid. There were 6 events of this. That was on top of 3 events of the temp sensor in the heat pump being out of range. My EAC is now popping and crackling, which it did not used to do. It appears to also be giving off way too much Ozone. I had to stop using it because it was giving my family sore throats, lung issues, and nose bleeds.

    I really need some pointers here, guys. This is truly depressing.

  9. #9
    Join Date
    Aug 2006
    Posts
    164
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    Originally posted by biggerbyte
    My problems with these thermal cutouts are both in the low and high stages and are becoming more frequent with many events in the same day. Last night I had 8 in a row in the low stage, and then compressor refused to work at all after that. This morning I turned evrything back on and was able to get the compressor to start without an error.

    The other day my 10kw electric heater failed with an error that told me that the heater size was invalid. There were 6 events of this. That was on top of 3 events of the temp sensor in the heat pump being out of range. My EAC is now popping and crackling, which it did not used to do. It appears to also be giving off way too much Ozone. I had to stop using it because it was giving my family sore throats, lung issues, and nose bleeds.

    I really need some pointers here, guys. This is truly depressing.
    What does your contractor say? Is it to the point where it will not hold your temp setpoint?


  10. #10
    Join Date
    Nov 2006
    Posts
    40
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    Originally posted by eberrong
    Originally posted by biggerbyte
    My problems with these thermal cutouts are both in the low and high stages and are becoming more frequent with many events in the same day. Last night I had 8 in a row in the low stage, and then compressor refused to work at all after that. This morning I turned evrything back on and was able to get the compressor to start without an error.

    The other day my 10kw electric heater failed with an error that told me that the heater size was invalid. There were 6 events of this. That was on top of 3 events of the temp sensor in the heat pump being out of range. My EAC is now popping and crackling, which it did not used to do. It appears to also be giving off way too much Ozone. I had to stop using it because it was giving my family sore throats, lung issues, and nose bleeds.

    I really need some pointers here, guys. This is truly depressing.
    What does your contractor say? Is it to the point where it will not hold your temp setpoint?

    The installer was out today. They think that the circuit board is bad. Makes sense with everything happening. I think they are going to find more once they get things back to at least where it can be turned on. With the compressor having all of these thermal cutouts over the past few months, I'm sure it is somewhat screwed as well.

    What burns me up is I told them weeks ago that something was wrong. The installer told me the thermal cutout errors were false positives. It is insane the B.S. I have gone through. If I had this to do over again I'd be riding a trane right now. I'm going to have to sleep in the heat tonight because they could not get a circuit board replacement today. I'm hoping tomorrow will be a different story. If not, I'll be sitting in the cold as there is a BIG cold front coming this way.

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