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Old 09-20-2005, 10:34 AM   #1
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Hello - I have a 15,000 BTU AC/HeatPump made by Dometic DuoTherm. When I use the HeatPump, the unit starts OK, and blows good heat for 5 to 10 minutes. Then either a motor or a compressor starts making a very load 60-cycle hum. So loud that my neighbor complained about the noise at night. It continues to blow hot air - it just makes this loud noise. I can shut it off, wait 10 minutes and repeat the process. Does anyone know what is causing this? Do you think it is OK to continue using the HeapPump until we get to a service shop? Thanks in advance for any suggestions.
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Old 09-20-2005, 10:34 AM   #2
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Hello - I have a 15,000 BTU AC/HeatPump made by Dometic DuoTherm. When I use the HeatPump, the unit starts OK, and blows good heat for 5 to 10 minutes. Then either a motor or a compressor starts making a very load 60-cycle hum. So loud that my neighbor complained about the noise at night. It continues to blow hot air - it just makes this loud noise. I can shut it off, wait 10 minutes and repeat the process. Does anyone know what is causing this? Do you think it is OK to continue using the HeapPump until we get to a service shop? Thanks in advance for any suggestions.
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Old 09-20-2005, 01:11 PM   #3
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Could it be possible that you have heat strips and they start the heat for the 10 minutes, then the compressor is trying to start but humming instead? If so, look at a start cap for the problem.
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