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Old 11-11-2020, 08:02 PM   #1
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2021 Interstate 24GL
Los Angeles , California
Join Date: Nov 2020
Posts: 9
2021 Interstate Lounge - No Power at Outlets

Couple weeks old 24GL. At some point in the last few days I noticed the TV's lost power on their standby lights. Here's what I've checked so far:

1) Inverter turns on. Green solid light. No faults.
2) No breakers tripped by main fuse box. Reset anyway.
3) Tried resetting the GFCI outlet behind the driver seat. Won't reset. Best current guess is bad GFCI outlet.
4) Tried holding down the little power button on the inverter under passenger seat for 15+ seconds until flashing showing reset. No change.
5) Checked the two little circuit breakers on the inverter did not seem popped

I am seeing AS Los Angeles service dept on Tues but would love to resolve this or at least isolate the issue beforehand with key trip coming up.

Any advice or confirmation on bad GFCI outlet theory greatly appreciated.
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Old 11-11-2020, 08:12 PM   #2
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2018 25' International
Slidell , Louisiana
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I am not certain about inverters on Interstates, but most of the pass through type have a specialty 15A fuse on the inverter to protect the outlets. This fuse is after the point where shore power is passed through so if the fuse is blown the outlets are dead in either mode. It is a slow blow fuse that appears to be more sensitive than the breaker protecting the pass though circuit.
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Old 11-12-2020, 08:02 AM   #3
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2021 Interstate 24GL
Los Angeles , California
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Thank you! Have ordered that fuse. Do you have any sense of where the replacement fuse goes? I wasnít able to see any obvious locations when staring at the inverter.
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Old 11-12-2020, 12:35 PM   #4
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Some of the have them inside, some use a beaker instead, I hope I didn't steer you wrong. If you know the model and brand, I can take a look.
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Old 11-14-2020, 11:23 AM   #5
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2016 Interstate Grand Tour Ext
North Bend , Washington
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2016 Airstream Interstate GT
I seem to have the same issue after plugging in a 1000 watt heater behind the drivers seat. Heater ran about 20 minutes before shutting off. Since then the standby lights on the TV’s are off and outlets by both TV’s do not have power.
Tried the same process from Gizmo-Mobile steps 1-3 - after which I have a hard time following the owners manual instructions. The reset button ( is this the button located under the drivers side seat in the back but on top of the box ) and where would the blinking light be? The 15 amp fuse?? Located where? What is a beaker?
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Old 11-16-2020, 01:44 PM   #6
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2021 Interstate 24GL
Los Angeles , California
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Thanks BayouBiker. Iím showing the Inverter model is Magnum MMS1012. However, it seems that the fuse in question is from a 3rd party and not part of the Magnum inverter kit. With that Iím assuming it just sits inline on the AC output exiting the inverter.

Hopefully the AS service department can resolve this when there tomorrow. Fingers crossed.
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Old 11-17-2020, 08:13 PM   #7
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2021 Interstate 24GL
Los Angeles , California
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AS Los Angeles was unable to diagnose the issue in their first hour looking at it and requested I leave it there for a few days which will have to wait until after Thanksgiving. They changed out the GFCI breaker with no change in status. They were not aware of the slow burn fuse on AC output and where it might be located.

When I got home I pulled up the 120V schematic in the manual and it seems to me that the GFIC outlet behind the driver's seat - which seems to feed the rest of the inverter outlets and was an early suspect in my list - may have failed. Hopefully will have time to open it up tomorrow and check with a multi-meter.
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Old 11-17-2020, 08:21 PM   #8
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Quote:
Originally Posted by gizmo-mobile View Post
AS Los Angeles was unable to diagnose the issue in their first hour looking at it and requested I leave it there for a few days which will have to wait until after Thanksgiving. They changed out the GFCI breaker with no change in status. They were not aware of the slow burn fuse on AC output and where it might be located.

When I got home I pulled up the 120V schematic in the manual and it seems to me that the GFIC outlet behind the driver's seat - which seems to feed the rest of the inverter outlets and was an early suspect in my list - may have failed. Hopefully will have time to open it up tomorrow and check with a multi-meter.
Yes - the GFIC outlet behind the driver seat is a well known problem on Interstates. Too bad you dealer wasn't able to solve your problem - doesn't say much for their abilities.
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Old 11-18-2020, 08:29 PM   #9
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2021 Interstate 24GL
Los Angeles , California
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Victory! Found the issue. Loose neutral feeding the gfci outlet line input. Back in business. Thanks everyone for the assistance.
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Old 11-18-2020, 10:36 PM   #10
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2016 Interstate Grand Tour Ext
North Bend , Washington
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Found my issue also....
“Beaker” - = breaker
There are two buttons on top of the inverter - I could not see the 15Amp breaker or green light until I removed the protective cover (White paper board/screen) at which point a simple push on the 15 amp breaker resolved the problem. My next issue is the overhead outlet in the galley that trips a breaker when checking it with a plug in tester - both plugins.
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