Dometic duo therm. Wierd issue need some input

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The Mylles Family

New member
Joined
Jul 11, 2019
Posts
1
Okay my rooftop a/c blows cold as can be, the issue comes when it reaches the desired temp, the blower shuts off, but it continues "Humming" as if the compressor is still running. It's not actually running, but it Buzzes or hums like it is.  I had issues with it not comming on last year & replaced the analog thermostat which solved the issue... But this is super annoying..
Please help
 

Henry J Fate

Well-known member
Joined
Jun 14, 2018
Posts
1,979
Could be several things humming.

Take some time and get up on the roof. Remove the cover and cycle the unit to see if you can identify where the noise is coming from.
 

Prior member

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Joined
Jan 20, 2015
Posts
1,232
The Mylles Family said:
Okay my rooftop a/c blows cold as can be, the issue comes when it reaches the desired temp, the blower shuts off, but it continues "Humming" as if the compressor is still running. It's not actually running, but it Buzzes or hums like it is.  I had issues with it not comming on last year & replaced the analog thermostat which solved the issue... But this is super annoying..
Please help

If it comes back on in a few seconds, that is normal and it is just changing the fan speed

Jack L
 
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