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Old 08-13-2017, 04:44 AM   #1
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Question Norcold N621 fridge has no 12V power to board or panel

New to this game and the forum. Took my RV out for a shakedown and discover the fridge had no power at the panel. No light inside either. I have AC power at the board outside with the generator, no still nothing on the panel. Have checked ALL fuses and breakers and all have continuity and are good. Where does the wiring to the unit terminate?

Both batteries have a full charge.

Thanks in advance for your help.
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Old 08-13-2017, 11:34 AM   #2
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Which RV do you have?

You can call Thor and ask for all the engineering diagrams: Including the 120V and 12V power.
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Old 08-13-2017, 12:25 PM   #3
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Pull the lower outside cover for your fridge, this gives access to the control board. Check for loose or bad connections, check for 12v power at the board.
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Old 08-13-2017, 04:05 PM   #4
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Checked DC panel fuses, as well as the 3 amp fuse in control box - all good. Was able to pull the cover without disconnecting wires

One thing I checked was the 12V leads going to the box - nothing on my meter. Did have AC power to the outlet on generator power.

Checked both batteries - full charge.

I understand I have to have 12V going to it - that's why I tested the wiring going to the board. I removed every fuse I had on the rig and tested continuity with a meter. My panel is not labelled clearly, so I don't know what wires go where. Oddly I have two lights that have no power either, so I suspect a bad connection, but don't know where to look. At least in my house I can trace circuits from the breaker box - frustrating!
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Old 08-13-2017, 04:08 PM   #5
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2000 Ford E450 Four Winds Majestic, 27 ft
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Old 08-13-2017, 05:07 PM   #6
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Pull the fuse at the DC Control Panel. Use a jumper to short + to - at the reefer connection point. Do a continuity check from the load side of the fuse to ground. No continuity? You have confirmed your suspicion. Now time to start wire tracing.

The part that makes no sense is that you have lights out as well. There should be no lights on the reefer circuit, but I did use the "should" word talking about an RV.
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Old 08-13-2017, 09:59 PM   #7
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Quote:
Originally Posted by JamieGeek View Post
Which RV do you have?

You can call Thor and ask for all the engineering diagrams: Including the 120V and 12V power.
2000 Ford E450 Four Winds Majestic, 27 ft
Have talked to Thor customer service - no help
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Old 08-13-2017, 11:19 PM   #8
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Quote:
Originally Posted by dmjenks52 View Post
2000 Ford E450 Four Winds Majestic, 27 ft
Have talked to Thor customer service - no help
Ah yeah I wouldn't expect them to have that for that vintage a coach.

So you checked power at the box, you've checked the fuses. Did you check for 12V at the terminals on the converter? Perhaps pull some of them with some pliers (with 12V & 120V power disconnected/off of course) perhaps one of them is loose.

As an extra step you could remove the converter--where is it in relation to the fridge? Is it a long way away? I'm pretty sure you don't have to disconnect all the wires to simply pull it out a few inches.
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