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Old 03-16-2020, 09:46 AM   #1
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2007 25' Classic
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Breaker tripping

Hey everyone - looking for a little help here - we are on the road right now in the Memphis area on our maiden voyage - everything has been great until we moved yesterday and traveled some terrible roads on the way to Memphis. When we arrived I noticed that the ceiling light in the living room wasn’t working - no big deal - until it started to get cold when I found that there was no 12 volt power to the furnace or water heater - poking about I found that a breaker on the dark blue wire had tripped - tried to reset and heater blower started for about 2 seconds before the breaker tripped again , no it trips immediately it is reset - so I’m thinking the water heater 12 volt and furnace 12 volt are all on the same circuit as the living room light - are there any in line fuses hidden somewhere ? Could it be a bad ground ? If so where are these circuits grounded ? I have a very grumpy travel companion right now and Memphis is COLD - any help you can offer might save our trip
Thanks
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Old 03-16-2020, 10:13 AM   #2
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Maybe someone has a circuit diagram they could post which might help me out
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Old 03-16-2020, 10:45 AM   #3
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The manual has a partial electrical diagrams pages G-3 to G-9 but does not show the 12V branch circuit details.

https://www.airstream.com/wp-content...manual-109.pdf

If you have a multi-meter, check the resistance from the blue lead to trailer ground, the breaker is 20A and V=I*R , R=V/I = 12/20 or about a half an ohm. So if the resistance is less than .7 or so the breaker is okay, but if the resistance is higher than 0.7 then the breaker is bad. Start there.
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Old 03-16-2020, 07:07 PM   #4
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Quote:
Originally Posted by BayouBiker View Post
The manual has a partial electrical diagrams pages G-3 to G-9 but does not show the 12V branch circuit details.

https://www.airstream.com/wp-content...manual-109.pdf

If you have a multi-meter, check the resistance from the blue lead to trailer ground, the breaker is 20A and V=I*R , R=V/I = 12/20 or about a half an ohm. So if the resistance is less than .7 or so the breaker is okay, but if the resistance is higher than 0.7 then the breaker is bad. Start there.
Thank you - I resolved the issue by switching off the 120v to the water heater - the 12 v breaker reset - donít understand why but Iím not using the electric to heat water anymore and will explore further when we get home. To be honest I donít even know why I thought that turning off the water heater electric would make any difference but it did.
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Old 03-17-2020, 03:15 AM   #5
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The water heaters use a 12VDC circuit to power the switches, ignition and control board. The 12V power is supplied through whichever electric or gas remote switch is on so by turning off the water heater, that cleared up the short, then the problem is in the water heater controller or if it only trips on electric then the electric heating relay.
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