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Old 07-16-2020, 06:24 AM   #15
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Quote:
Originally Posted by Snapcap3 View Post
I ran it today with and without the Surge Guard. There doesn't seem to be that much difference in voltage. Without the guard voltage is 117.5 vac and 109 when fan and compressor are running. With surge 117.5 and 108.6. This is on a 20amp circuit. Compressor seemed to work as it should....baffled
I think the 44270 is supposed to blow when spiked. It's non-repairable.
The voltage at the air conditioner is the issue. A 9 volt voltage drop is much more than expected and the 108.6 volts is possibly enough to prevent the compressor from starting. You have measured at an outlet. I will assume it is an outlet inside the TT. Even so, the voltage at the compressor may be a little lower.

The garage outlet you connected the TT to may cause the voltage drop.
The surge protector is probably not the culprit. It only causes a 0.4 volt drop. It does however contribute to the accumulated losses.
The adapters used may be the culprit.
The TT 30 amp cord may be the culprit.
The service entrance in the TT may be the culprit.
All of those things together may be the culprit.
Measuring at points along this path will possibly isolate the cause or indicate you have too many plugs, cords, and sockets in the circuit. Use the same adapters and cords you use at campgrounds where the issue occurred.

Assuming all other appliances in the TT are "off" a 13 amp draw by AC should not cause a 9 volt drop. A 9 volt drop at 13 amps is 117 watts of power being dissipated in the line and connectors. That is enough power to run a large incandescent light bulb. Adding other appliances will further lower the voltage. I have an electric water heater that would easy double the voltage drop. When it is turned "on" I never know when it has cycled on or off. What else might be drawing power?

I wish you good luck and happy trails ahead!
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Old 07-16-2020, 08:19 AM   #16
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You are correct I have an adapter on both sides of the SP
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Old 09-26-2020, 11:01 AM   #17
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The end story

Hello all that were following my thread. It wasn't a power issue at all. I can now fill in all the blanks about the Dometic AC unit (if you care and don't fall asleep first) I purchased my rv new from a Highland Ridge dealer in Streetsboro Ohio. Soon noticed AC short cycling. I took it to them in July 2019 and they could not find anything wrong. No charge for service call. Still having issues at this point. That dealer no longer a Highland Ridge dealer and now General RV is the dealer in my area. I took it to them in July 2020. They listened to it, while working on something else, and said there was nothing wrong with it. No diagnostics just listened. The charged me for one hour of labor. I found a independent authorized Dometic AC repair center in my area. Buckeye RV Service. [U][B]They found something right away!! The AC unit was not installed correctly when built. The air return was all coming from the hot attic instead of the cabin. They sealed the return air away from the attic. Now the return air duct inlets will hold a piece of paper against it while running. They sent me some good photos of before and after. I went back to General RV with my story. The service manager realized they really didn't do anything to earn that one hour labor charge. He refunded my money. Good for General RV. I contacted Jayco, the owners of Highland Ridge, and told my story to a customer service rep. Out of warranty, Buckeye was not a Jayco authorized dealer, not going to help. I asked for a manager. They couldn't transfer as working from home. They said a manager would call. And one did! the next day. I sent the pics and the storyline. Long story short, Jayco sent me a check for the full amount of the Buckeye RV service!! KUDOS to Jayco for stepping up to the plate! We just got back from a trip out West. AC unit is working perfectly.
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Old 09-26-2020, 11:28 AM   #18
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Good news that you now have working air conditioning, good that you stayed on Jayco, and good that they ultimately took the right action.

Gotta love a happy ending... 'And they went camping happily ever after.'
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Old 09-27-2020, 05:29 AM   #19
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I'm glad you were able to repair your air conditioning system. However, I'm having trouble understanding why the fact that it was drawing air from the hot attic would cause the compressor to not start or to short cycle.

Can somebody explain? Just wanting to try to understand what was going on. Thanks.
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Old 09-27-2020, 07:24 AM   #20
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I'm not sure either. it's not something I know a lot about. Possibly causing the unit to work too hard and freeze the coils? Super heat the refrigerant? Cause the compressor to overheat and shut down????
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Old 07-08-2021, 09:22 AM   #21
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Hello

I know it’s an old thread. But I am filing my thumbs typing away on Google trying to figure out the problem I am having with my ac. Very similar to your story, I have a one year old travel trailer with a dometic ac.

When I turn on the ac the fun runs but the compressor only runs for a few minutes then shuts down. Only way I can get compressor to turn back on is to continuously fiddle with the thermostat on amd off. When it runs it does cool the air very well

Do you have pictures you can share of how they fixed the air intake issue?

Thanks you!!
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