CaptPat Posted July 28, 2022 Share Posted July 28, 2022 We took our MH to a local campground for a shakedown, as it's been awhile since we've used it, in preparation for a longer trip in September. We experienced some unusual behavior from each of the 3 AC units, particulars follow-- We have 2 Dometic 630516.331, and 1 630035.331 with a DuoTherm 5-button thermostat. We ran all AC's on the generator for the 1 hour trip to the campground, set up and switchover to site power went uneventfully. Later in the afternoon units 1 and 2 stopped, though the thermostat indicated both 1 and 2 with bars under them. I reset the thermostat and AC 1 and 2 restarted they ran for another 2 hours before stopping again. Repeated the process successfully, when we went to bed I turned 1 off, leaving 2 and 3 (BR) to run through the night. In the morning 3 was still running, I assumed 2 had turned off as the set temperature was reached, thermostat showed 2 no underline, and 3 underline. As the day heated up 2 would not start when called for by the thermostat, neither would 1. I tried resetting the main power, and shifting to the generator no change. Eventually I was able to restart 1 and 2, they ran for about 90 minutes before shutting down again, shortly thereafter 3 stopped, thermostat showed 3 with underline at this time. When I reset the thermostat (several times over the day and a half and tried to start units to AC mode I could hear what sounded like a contact picking up near the inlet plenums though the units were not turning on. I'm pretty sure that site power was okay as my surge protector indicated normal V/Hz/A readings. When running each unit seemed normal, cold air and normal air flow. At no time did any of the site or coach breakers trip. Does this sound like a capacitor issue or something else? The next several days are going to be way too hot (99+) to go on the roof to see for myself. Once I get up there is there anything else I should check? Thanks Link to comment Share on other sites More sharing options...
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