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Old 09-10-2010, 04:58 PM   #1
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Refr troubleshooting Norcold N621

Hello Folks!

So I parked the rig for almost 2 weeks while I was away on a plane trip when the LP ran out and the refr stopped working. Filled the tank and all seemed OK Until Thursday. (I'm only mentioning this because it happened just a few days prior.)
---
.

On Wednesday I parked on a steep angled driveway while visiting a friend for a couple of days and when we came up for air (and to get coffee and eggs and good Neeses sausage) I discovered that the refr was no longer keeping the stuff cold.

Moved rig to horizontal position.
Inside light works.
Gas burner works.
Controls accepts all input changes...

But it still won't get cold.
---

Ideas and suggestions are very welcome.
Thanks

N621 / 91111 / 769330FK
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Old 09-10-2010, 09:14 PM   #2
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Your fridge is getting old, now probably 11-12 years. Could be that the extreme slope kicked some crystalizing coolant to a place it restricts coolant flow. level is important. Could also be a brain fart. Try removing all 12V, 120V, and let it set for maybe 10 min. then plug it back in, switch it on. Might reboot.
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Old 09-11-2010, 09:50 AM   #3
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You may need to "burp" the coolant. Take the MH out for a drive on some bumpy roads. I've heard this could take care of the cooling problem. Never had to try this myself. But if you're using the fridge (especially older ones), the MH should be parked in level or near level places.

Good luck!
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Old 09-12-2010, 09:51 AM   #4
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Thanks for the suggestions and insight.

I was stumped as everything that I *could do* didn't really seem to need doing.
Long story short and for reasons completely unknown to me (but likely related to the suggestions above) the refr is again working as it should.

Henceforth I shall never park the rig on a steep angle for any extended length of time and try to not do that for even shorter times.

Thanks again.
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Old 09-22-2010, 09:17 PM   #5
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The first test is to inspect the rear of the refrigerator for a yellowish green residue and smell inside and outside for an ammonia smell. If this test fails, turn it off immediately. Your cooling unit is shot. Check for possible recalls from the cooling unit serial number. The next step would be to verify flame or heat at the rear of the fridge to verify that the unit electronic controls are working. Operating a refrigerator off level causes cumulative damage to the refrigerator cooling unit. Always operate a refrigerator level. Sometimes a burp procedure can be performed to restore flow. This would require disconnecting and removal of the refrigerator. Lay it on its right side for at least 12 hours, upside down for at least 23 hours, left side for at least 12 hours then upright for at least 12 hours. Reconnect fridge and test operation.
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Old 10-17-2010, 11:10 PM   #6
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Yeah, and that fridge removal is not easy. I think they built the MH around my fridge. Last summer I found spoiled meat in my freezer and discovered the tell-tale yellow/green residue in the outside compartment. No ammonia probably because of the delay in finding anything wrong. I replaced the cooling unit and the next day found new yellow/green deposit, with ammonia smell. The supplier was great in replacing the replacement without waiting for the first core to be returned. A few days later I replaced the "new" cooling unit and have not had a problem since. Not an easy job, but it can be done.
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