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Old 02-04-2009, 11:52 PM   #1
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Dometic refrigerator blowing fuse!

HELP! My 08 Flagstaff v lite refrigerator has blown the 5 amp fuse under the outside access cover, there is ANOTHER cover in there, and behind that is 2 glass automotive style fuses, I understand the 5 amp horizontally mounted fuse is for 110v operation, and the smaller vertically mounted 3 amp fuse on the side is for 12v operation. My question is this... WHY do I keep blowing this fuse? Logically deducted, I do camp under battery power 12v a lot of times, and I guess I need to turn the fridge off before hooking up at home to 110 again. Also, I have 2 batteries, and I currently have to disconnect the wing nuts from one, and re-connect the other. I guess I SHOULD turn the fridge off while doing this, and install an AB switch also. Anyone else had issues with this? Randy
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Old 02-05-2009, 09:38 AM   #2
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Here's a simple diagram of the wiring. The 5amp fuse is for 120v operation. I'd suspect you have a shorted heating element/heating element wiring or a bad board. You can check the element by turning off all power, disconnecting the element and reading the resistance across it. It should read about 40 ohms. You should test from the element to ground. It should read infinity. Your unit should still be under warranty so I wouldn't spend a great deal of time on it unless the hassle of taking it to the dealer outweighs the cost of repair.


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Old 02-05-2009, 03:07 PM   #3
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Dometic blowing fuse

The thing is, under normal operation conditions, it is just fine. Replace fuse, and it works great on 110v. It is only when I do something to interrupt normal power to the fridge that this occurs; like switching power sources- batt. to 110v, or Ac to battery. I'm going to try to make sure the power button on fridge is in the off position before plugging in or out of 11v from now on, and see if this fixes the problem. Thanks, Randy
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/SIGPIC]'08 V-lite Flagstaff 30WRLS
'06 Ram 1500 QC hemi Reese dual cam sway control,
K&N series 77 intake, Hellwig helper spgs. LT tires,
Flowmaster "true duals", 380 h.p., Bilstein shocks
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Old 02-05-2009, 03:49 PM   #4
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Your fridge should not blow a fuse just because you switched power with it on.
In fact, my dealer told me to leave my refer in "auto" mode because that way
if we are on shore power and someone trips over the cord and pulls my plug while
I'm away, my refer will automatically switch to gas and stay cold.
He also said if I'm on gas (like on a road trip) and I plug it into shore power it will
automatically switch off the gas and go back on 120v ac.
I've tried this and it does work as he said.

If yours is blowing the ac fuse every time you switch power modes, it needs to
be fixed under warranty.

Good Luck!
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Old 02-06-2009, 09:07 AM   #5
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I 100% agree with Dan. Ours is never taken out of 'Auto' and has only been switched off about 3 times since we've owned it. It's sitting at the house right now plugged into shore power and when we're ready to go camping I just unplug the RV and the fridge switches to gas. Then when we get to the site I plug it back in and it switches back to AC operation without a glitch.

Time to seek warranty work.
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Old 02-06-2009, 04:37 PM   #6
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have only this to add

bama rambler
THANK YOU for the schematic and great explanation
its folks like you that really make this a great place
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Old 02-07-2009, 11:31 AM   #7
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Thanks guys for your advice. I'll take it in to the dealer and see if they can find out what's causing the problem. I have until next month when the 1 year anniversary is. Thanks again, Randy
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/SIGPIC]'08 V-lite Flagstaff 30WRLS
'06 Ram 1500 QC hemi Reese dual cam sway control,
K&N series 77 intake, Hellwig helper spgs. LT tires,
Flowmaster "true duals", 380 h.p., Bilstein shocks
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Old 10-12-2014, 06:44 PM   #8
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Hey guys just had the same thing happen on my 2014 WPT18EC, does it also have the "hidden" fuses because it was working fine and I had my generator "sputter" as it ran out of gas and I'm afraid it may have blown a fuse I can't find. Everything else works fine just no power to refrig (no lights on board, no light when door is opened). Any help would be appreciated
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