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07-26-2021, 10:24 AM
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#1
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Established Member
Join Date: Jan 2019
Location: Ukiah
Posts: 15
M.O.C. #23242
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Unusual Electrical Issue
Had a weird issue pop up last night. We are coming up on 3 years in our 2018 3950BR. Had both ACs running with just a couple lights on. Went out in the yard for a few hours and came back. Main AC was not on. Thermostat had power but no AC. Cycled over to fan only and no good. Totally out. Microwave was also out. However I just replaced the door sensor in it a couple months ago that burned out last year. It was working well. GFI outlets are also out. Went on roof but no scorching around the unit or anything out of ordinary. Tried to reset GFI but it won't reset. Our friend pressure washed our rig for us and may have gotten water in the outside outlet to trip the GFI. However would that also trip the microwave and the AC unit? Fuses are all good and none of the breakers are tripped. I'm stumped. 
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07-26-2021, 10:29 AM
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#2
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Montana Master
Join Date: Sep 2017
Location: Florence
Posts: 945
M.O.C. #20472
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So you don’t have any AC voltage in your 5th
__________________
2018 Ram 3500 MegaCab 4x4 Aisin, 4:10 Gears
Titan 50 Gal Tank, Air Lift Wireless Bags
2017 3160 RL
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07-26-2021, 10:31 AM
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#3
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Established Member
Join Date: Jan 2019
Location: Ukiah
Posts: 15
M.O.C. #23242
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The front AC works fine... The rear AC does not kick on even in fan mode.
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07-26-2021, 10:32 AM
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#4
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Montana Master
Join Date: Sep 2017
Location: Florence
Posts: 945
M.O.C. #20472
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Is there a fault code flashing on the thermostat
__________________
2018 Ram 3500 MegaCab 4x4 Aisin, 4:10 Gears
Titan 50 Gal Tank, Air Lift Wireless Bags
2017 3160 RL
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07-26-2021, 10:33 AM
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#5
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Established Member
Join Date: Jan 2019
Location: Ukiah
Posts: 15
M.O.C. #23242
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No codes... looks like it is working normally. AC just doesn't respond.
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07-26-2021, 10:33 AM
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#6
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Montana Master
Join Date: Sep 2017
Location: Florence
Posts: 945
M.O.C. #20472
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As for the outlets have you checked the breaker panel
__________________
2018 Ram 3500 MegaCab 4x4 Aisin, 4:10 Gears
Titan 50 Gal Tank, Air Lift Wireless Bags
2017 3160 RL
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07-26-2021, 10:33 AM
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#7
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Established Member
Join Date: Jan 2019
Location: Ukiah
Posts: 15
M.O.C. #23242
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Fridge still works fine and half the outlets are still on too.
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07-26-2021, 10:34 AM
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#8
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Established Member
Join Date: Jan 2019
Location: Ukiah
Posts: 15
M.O.C. #23242
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Breakers were not tripped but reset all of them anyway. Fuses don't show a burnout either.
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07-26-2021, 10:39 AM
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#9
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Established Member
Join Date: Jan 2019
Location: Ukiah
Posts: 15
M.O.C. #23242
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Central vacuum is also out.
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07-26-2021, 10:42 AM
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#10
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Montana Master
Join Date: Sep 2017
Location: Florence
Posts: 945
M.O.C. #20472
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Does your basement have an outlet in it that is a GFCI, we have a 3160 RL and we have 2
GFCI, bathroom and basement. AC is not on a GFCI and nor the microwave. If you have a tester unplug the microwave and check it for voltage and the same on your main ac. The thermostat is powered by 12V but still could be a communication issue to the ac unit. I had issues with our and ended up being the communication wire in the junction box in the ac unit.
__________________
2018 Ram 3500 MegaCab 4x4 Aisin, 4:10 Gears
Titan 50 Gal Tank, Air Lift Wireless Bags
2017 3160 RL
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07-26-2021, 10:43 AM
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#11
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Site Team
Join Date: Oct 2005
Location: Carmichael - CA
Posts: 7,362
M.O.C. #4831
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I will bet the A/C, microwave, and the non-functional GFCI circuit are all on the same leg of the 50 amp supply. Check the voltage coming into each 50 amp breaker. Either the power pole, the cord, connection at the rear, or the transfer switch (if you have one) has a dead leg.
__________________
Carl (n Susan)
There is more to life than fuel mileage.
2012 Montana 3700RL Big Sky Package towed by a 2015 Ford F350 6.7L PSD 4WD CC LWB
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07-26-2021, 10:47 AM
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#12
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Site Team
Join Date: Sep 2017
Location: Oro Valley
Posts: 3,929
M.O.C. #20477
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Sounds like you have lost one leg out of your 50 amp plug. Recommend turning power off at the pedestal and taking a good look at the plug going in the back of your rig. You may have a burnt or loose connection.
__________________
Zack and Donna plus Millie and Ranger
2018 3160RL
"Life is too short to stay indoors, enjoy the ride!"
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07-26-2021, 10:53 AM
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#13
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Established Member
Join Date: Jan 2019
Location: Ukiah
Posts: 15
M.O.C. #23242
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There is only one GFI outlet that we have ever found and it's in the bathroom. It runs in line with the basement, outside and kitchen island outlets. We have had the GFI trip from water getting into the outside receptacle before. However I don't recall if it was hot at the time because I don't recall the AC factoring in. The microwave outlet does not have juice either but I think the door sensor had gone bad before that outage so I'm not sure if it is also on the GFI. The outlets under the microwave are on a different line, they work fine along with the office and the TV and fridge.
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07-26-2021, 10:54 AM
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#14
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Established Member
Join Date: Jan 2019
Location: Ukiah
Posts: 15
M.O.C. #23242
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Quote:
Originally Posted by AZ Traveler
Sounds like you have lost one leg out of your 50 amp plug. Recommend turning power off at the pedestal and taking a good look at the plug going in the back of your rig. You may have a burnt or loose connection.
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Going to check it out now.
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07-26-2021, 11:02 AM
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#15
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Established Member
Join Date: Jan 2019
Location: Ukiah
Posts: 15
M.O.C. #23242
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Quote:
Originally Posted by SuziesMontana
Going to check it out now.
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THAT WAS TOTALLY IT!!!!!!! The receptacle was loose plugged into our surge protector. As soon I pressed on it the lights on the left side of the unit lit up and everything turned back on. THANKYOUTHANKYOUTHANKYOU!
Thank you DadsHemi for helping me rule out other issues. 
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07-26-2021, 11:25 AM
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#16
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Montana Master
Join Date: Aug 2004
Location: Livermore
Posts: 5,144
M.O.C. #1920
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Glad you found it, but you do have another GFI somewhere, potentially down by the table. You may want to find it for future reference.
__________________
Ron and Terrie Ames - MOC #1920/KF0NTA
2021Montana 3230CK Super Solar Legacy Package
2021 Ram 3500 Laramie Longhorn, BIM Charging
4x4, SRW, LB, Crew Cab, Pullrite 3900 Hitch
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07-26-2021, 11:30 AM
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#17
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Montana Master
Join Date: Sep 2017
Location: Florence
Posts: 945
M.O.C. #20472
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Awesome…glad the issue was resolved
__________________
2018 Ram 3500 MegaCab 4x4 Aisin, 4:10 Gears
Titan 50 Gal Tank, Air Lift Wireless Bags
2017 3160 RL
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07-26-2021, 11:45 AM
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#18
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Montana Master
Join Date: Dec 2009
Location: Sebring
Posts: 3,658
M.O.C. #9969
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That's one of the reasons I love my Hard Wired Progressive EMS. The inside remote display tells me Voltage on each leg and the current each leg is drawing.
__________________
Michelle & Ann
2018 Chevy 3500HD High Country DRW 4X4 Crew Cab w/Duramax/Allison, Formally 2010 Montana 2955RL, Now Loaded 2016 SOB, Mor/ryde IS, Disc Brakes & Pin Box, Comfort Ride Hitch, Sailun 17.5 Tires.
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07-28-2021, 03:51 PM
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#19
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Montana Fan
Join Date: Nov 2011
Location: Albany
Posts: 407
M.O.C. #11972
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Sounds like you have lost one phase of your 50 amp power. GFCI outlets will not reset if they do not have power. I'd start at the pedestal and check for both 50 amp legs. If it is there, pull the power cord from the RV and check for both legs there, If good, check for both legs at the converter. If it is not at the converter, I'd pull the 50 amp connector on the back of the RV to see if it has bad/corroded/shorted connections. Could be water shorting a leg to ground after the pressure washing.
__________________
2012 3150RL. G614 tires. Hardwired surge protector. Level-Up Hydraulic leveling.
2013 F-350 Lariat 6.7 PSD SRW SC LB 4X4 OEM hitch, air self-leveling on rear. 57-gallon replacement fuel tank. DieselSite water separator/fuel filter.
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