AC issues need diagnosis
I have 3 AC's on my motor home. All Coleman mach series with Atwood thermostat. When I bought the coach a year ago I was told the two front ACs had just been replaced and they are much newer than th...
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ok so in the day since my last post the AC furthest to the rear (zone 2) has new issues. It will start normally blow very cold air for 20 minutes or so then the compressor shuts down and wont come back on again.
I opened it up suspecting a burnt out capacitor, but no evidence of any thing like that. All looked as it should on the inside. I checked everything Doug had memtioned as well.
The issue with the other two units would show itself as the inside temp got close to what ever the set temp was set at. Yesterday I tried to isolate the issue by only working on the middle or zone 3 AC. I popped that open as well, looked really good inside as this one is just about 18 months old. I ran it for a couple hours and could not recreate the issue. Then it got hot inside so I put all 3 on to cool the place. Once all three where on the issues started again. Zone 2 will only run the fan after 20 minutes, 3 zone cools the best becuase the compressor runs the longest before failing. Zone 1 compressor just went into the cycle of fan running, compressor starting, making the horrible noise (which is getting louder) and failing, then starting all over again. Running all three would not cool the motor home. Inside temp was 86, set temp was 77. Could not get the inside temp to come down even 1 degree. This is very mind boggling.
I opened it up suspecting a burnt out capacitor, but no evidence of any thing like that. All looked as it should on the inside. I checked everything Doug had memtioned as well.
The issue with the other two units would show itself as the inside temp got close to what ever the set temp was set at. Yesterday I tried to isolate the issue by only working on the middle or zone 3 AC. I popped that open as well, looked really good inside as this one is just about 18 months old. I ran it for a couple hours and could not recreate the issue. Then it got hot inside so I put all 3 on to cool the place. Once all three where on the issues started again. Zone 2 will only run the fan after 20 minutes, 3 zone cools the best becuase the compressor runs the longest before failing. Zone 1 compressor just went into the cycle of fan running, compressor starting, making the horrible noise (which is getting louder) and failing, then starting all over again. Running all three would not cool the motor home. Inside temp was 86, set temp was 77. Could not get the inside temp to come down even 1 degree. This is very mind boggling.
