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Old 03-05-2019, 06:37 PM   #1
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12V power

I seem to have a problem with my 12v power. I installed a new charger/converter but a/c and furnace unit will not turn on. Battery is fully charged. I'm pretty sure the ac power is ok. Any help appreciated
Thanks, Jim
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Old 03-05-2019, 07:20 PM   #2
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You’ll have to multimeter your way along to find a blown fuse, loose wire or something, most likely simple. Good luck!
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Old 03-05-2019, 07:31 PM   #3
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I seem to have a problem with my 12v power. I installed a new charger/converter but a/c and furnace unit will not turn on. Battery is fully charged. I'm pretty sure the ac power is ok. Any help appreciated
Thanks, Jim
Pretty sure ain't gonna cut it. Use a volt meter. Start at the shore power and work back to the rig. Furnace is 12 volts. Check ALL circuit breakers with a volt meter.
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Old 03-05-2019, 07:52 PM   #4
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Pretty sure ain't gonna cut it. Use a volt meter. Start at the shore power and work back to the rig. Furnace is 12 volts. Check ALL circuit breakers with a volt meter.
12VDC DOES NOT use breakers. There will be fuses and or relays
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Old 03-05-2019, 07:59 PM   #5
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12VDC DOES NOT use breakers. There will be fuses and or relays
I 'm a 50 year master electrician. I'm pretty sure I know where breakers are used. My 12 volt statement was to inform the OP that his furnace was 12 volt and not 120 volt controlled by breakers.

To be technicaly correct there are in-fact 12 circuit breakers. My 56 Desoto had automatic reset breakers in the headlight circuit. They are also installed in our RV's as main battery breakers inline within 6' of the battery.
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