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Thread: HVTEC16DABS Haier wine cooler - need part replacement advice

  1. #1
    Join Date
    May 2018
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    North Carolina
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    Default HVTEC16DABS Haier wine cooler - need part replacement advice

    Model Number: HVTEC16DABS
    Brand: -major brand-
    Age: 1-5 years

    I have a four year old Haier wine cooler model HVTEC16DABS that is having electronics problems and hope to get advice on which part needs to be replaced. I can get parts at a reasonable cost via Haier/Encompass website and I like the appliance, so, I'd prefer to swap out a part or two instead of buying a new cooler.

    Problem Description: This problem started about 3 weeks ago. No known cause. When the cooler is first plugged in, it works perfectly for about 3 days. It is a dual zone thermoelectric cooler and both zones cool rapidly and reach the desired temp. After about 3 days, the front LED control panel goes blank (one time it stayed lit but was unresponsive), and, both zones no longer keep their target temp. The external fans are fully stopped. The internal fans are still running, though it appears to me that the top internal fan is running slower than the bottom one. Both the top and bottom zones appear to still be cooling a little, but, not nearly enough to stay at target temp. Under the back cover, the red and green LEDs on the two circuit boards that control the top and bottom cooling units are all dark. Normally, they are lit when the cooler is running normally, and, when the internal and external fans are running. There are no unusual sounds (at this point) and no error codes displayed on front LED panel. I can't detect any excessive heat from any of the heat sinks on the circuit boards or the fan cooling units.

    Things I've Tried: If I simply unplug it, wait a couple of minutes, then plug it back in, the problem continues but I also hear a fast beep (every half second) coming from the front LED panel. The panel is still dark and unresponsive, and, nothing else changes. BUT - if I unplug it and leave it unplugged overnight, then when I plug it back in it works perfectly again (for about another 3 days).

    My Guess: I haven't been able to detect any specific part that is clearly a problem. Since the problem occurs after running several days, AND, it does not go away with a simple quick unplugging, my guess as to the cause is either (a) one of the circuit boards or cooling units is overheating, or, (b) one of the circuit boards has a bad component (capacitor?) that also takes a long time to reset/discharge.

    I've ensured the cooler has plenty of ventilation, and, there is no dust accumulation on the filters, fans, or heat sinks. If any component is overheating, it is not due to environmental problems.

    Since I have not been able to narrow the problem to any specific component, I have not yet tried swapping out circuit boards or cooling units. I'm hoping folks on this forum can provide some insights, additional diagnostics, and recommendations so that when I do order a new part my odds of getting it right the first time are much higher.

    I've attached a few photos of the unit/components in case it helps. Thanks in advance for your help!
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  2. #2
    Join Date
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    Murray, Utah 84107, United States
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    Default

    It sounds like the temperature LED board is causing the problem but I can't rule out one of the main boards is causing the problem with the LED board so here's what you do next time it goes out. First listen closely to each board. If a board is making a noise, it's bad. Then check the supply voltage for each board (115 VAC). Check the output voltage on each board and the input voltage for the LED board (12VDC). If the voltage checks good, disconnect the line voltage connector for the top board and see if anything changes. If nothing changes, reconnect the line voltage connector to the top board and disconnect the lower board line voltage connector.
    OWNER RICK'S APPLIANCE REPAIR
    APPLIANCE TECHNICIAN FOR 31 YEARS
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  3. #3
    Join Date
    May 2018
    Location
    North Carolina
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    Default

    Thanks Rick. I haven't noticed any noise from the boards but will check it out more closely. And I'll check the voltages, etc that you suggest. Of course I'll have to wait a couple of more days before the problem happens again, but, I'll update the thread afterwards.

  4. #4
    Join Date
    Jul 2006
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    Default

    Sounds good keep us posted.
    OWNER RICK'S APPLIANCE REPAIR
    APPLIANCE TECHNICIAN FOR 31 YEARS
    REFRIGERATION SPECIALIST
    ONLINE SERV TECH: ApplianceBlog.com
    CERTIFIED TYPE 1; TYPE 2.....REFRIGERATION SERVICE E.S.

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