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Goodman minisplit flashes on pre. Def. Wont start

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If what MM suggested doesn't work, I would say that the refrigeration system isn't working. Pre def means that the indoor unit is waiting to get hot before it starts again. Feel the coil behind the filter, it should be getting hot when on heating mode. If its getting hot and the machine is still sitting on pre / def, it is most likely that the indoor pipe sensor has failed. This sensor triggers the indoor unit to start once it has reached operating temperature. If the coil is not hot, check that the outdoor unit is actually running. When on heat mode, the outside unit should be blowing cold air as the hot refrigerant is now going inside. If the outside unit is blowing warm air , then that would indicate that the reversing valve system is not operating.

Posted on Apr 13, 2015

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You have to try resetting the system. First turn the breaker off for the condenser and wait about 20 seconds. After you turn it back on the system should reset.


Air Conditioning Repair Tamarac

Posted on Apr 12, 2015

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Posted on Jan 02, 2017

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