Dometic Circuit Breaker won't reset

[F451degrees]

traveling down the road and circuit breaker tripped....had been working good for the last 2 days on gas and 120.


Wont reset , what on the refer could cause this? high limit switch? if so where and how to reset.


tom

[Old-Biscuit]

High Limit temp switch trips 12VDC to fridge...nothing to do with 120VAC tripping


Unplug fridge AC Power Cord
Reset Circuit Breaker
Does it reset?
NO.....issue is with outlet and or wiring to outlet
YES....then fridge AC circuit could be issue

Is this a GFCI that is tripping?
Then fridge AC Element is 'leaking' current




What model of Dometic is this?


High Limit Switch on 2004 vintage would be part of 'recall' work

Temp switch installed in stack above burner

Manual reset button in center of switch
IF tripping.....coolant leak----yellowish residue around burner area. Cooling Unit DEAD
(Caution: residue toxic....clean up with mask/gloves wet rags NO Air Compressor)

[F451degrees]

dometic ndr1292, don't see a reset switch above the burner. It's the 12 volt breaker that is tripping, so no dc to unit. unpluged and still trips.


something 12 volt is wrong


driving for nearest wallyworld to buy a cooler. still 3 hours from one.


thanks

Tom

[F451degrees]

stopped for fuel and tried to reset breaker, it reset and fridge started on gas, as it was unplugged.
after a few minuets, chek light came on and a little while later breaker blew again.


can't find any trouble shooting for this dometic like i could for my norcold in the last coach.


Any Ideas?


will be driving and check back when I stop again.


thanks



Tom


Oh boy, a wind and rain squall .....

[Gumpster808]

Had the same issue last year with the 120 volt breaker tripping. Swapped leads on the back with the water heater then the water heater wouldn’t work in 120 - breaker tripped once closed.

Had to kind of feel it tripping when closing as it initially was not evident that it was tripped as well.

Went out and bought a new breaker - replaced and all good since then.

[Old-Biscuit]

OK.......now that you posted the model


dometic ndr1292
Some didn't have the High Temp Limit Switch
Some did........Red 12VDC wire from DC Terminal Block to 'thermofuse' (on stack) ---Red 12VDC wire from thermofuse to J4
See pg 32-----http://rvrefrigeratorrepair.com/wp-c...350-RM2850.pdf


You have a 12V DC circuit breaker that supplies the DC to fridge?
What size is that DC circuit breaker.......10A?


The fridge DC is protected by a 3A fuse on the fridge lower circuit board
12V DC from your DC circuit breaker goes to a DC Terminal Block on the backside of fridge. From there 12VDC+ goes directly to J4 connection on circuit board THEN thru the 3A DC fuse. (models w/o the thermofuse)



Your DC circuit breaker is for protection of DC wiring to fridge
The 3A fuse on fridge circuit broad is for protection of fridge DC circuits


Think your problem is with the wiring from DC CB to fridge terminal block

[Pappion]

I looked at the manual. Still not clear if this is a 2 Way or a 3 Way that includes DC heater. But 10A CB is a bit light for DC heater.

Safety 1st: unplug the AC. Control board will likely an AC glass fuse, a real shocker.

3 way DC heater may have short. The fuse for it could be on the Frig circuit control board. It would be the larger amperage of the two ATC blade type. Mine is on the wire, in a waterproof ATC fuse holder. Either way try pulling this fuse, but leave the 3-5 amp ATC in place.


2 way. Your not blowing the 3 amp fuse, so far so good. Problem is likely in the wiring. Smashed or fried wire shorting to chassis. A loose connection at the circuit breaker will heat up the CB. Typical CB trips due to internal heating.

[Old-Biscuit]

Originally Posted by Pappion

I looked at the manual. Still not clear if this is a 2 Way or a 3 Way that includes DC heater. But 10A CB is a bit light for DC heater.

Safety 1st: unplug the AC. Control board will likely an AC glass fuse, a real shocker.

3 way DC heater may have short. The fuse for it could be on the Frig circuit control board. It would be the larger amperage of the two ATC blade type. Mine is on the wire, in a waterproof ATC fuse holder. Either way try pulling this fuse, but leave the 3-5 amp ATC in place.


2 way. Your not blowing the 3 amp fuse, so far so good. Problem is likely in the wiring. Smashed or fried wire shorting to chassis. A loose connection at the circuit breaker will heat up the CB. Typical CB trips due to internal heating.

OP is tripping a DC circuit Breaker that SUPPLIES the DC to the fridge
No fuses on the Circuit Board are blowing


I asked if size of the DC CB ...10A or what




OP has NOT responded to questions


But if OPs fridge doesn;t have the Stack Thermofuse and is NOT blowing any fuses on circuit board then MUST be an issue in 12V DC POS wiring to fridge DC Terminal Block


OR I have completely mos-read OPs post

[Pappion]

Hey Old Biscuit, I don't mean to step on your toes.


Yea the OP never said about the size of the CB.


Amazon lists two different Control Board replacements depending on serial number. A 2 Way and a 3 Way. No DC Heater fuse on 3 Way so it must be external like mine. Diagrams for mine that have DC Heater fuse say 30A, but my fuse box is 20A. Go Figure! So I say if you have DC Heater fuse pull it and try again. Be Safe unplug AC 1st.

[Old-Biscuit]

Originally Posted by Pappion

Hey Old Biscuit, I don't mean to step on your toes.


Yea the OP never said about the size of the CB.


Amazon lists two different Control Board replacements depending on serial number. A 2 Way and a 3 Way. No DC Heater fuse on 3 Way so it must be external like mine. Diagrams for mine that have DC Heater fuse say 30A, but my fuse box is 20A. Go Figure! So I say if you have DC Heater fuse pull it and try again. Be Safe unplug AC 1st.

Don't think OPs fridge is 3 way
Just 120V AC and Propane
Stated DC breaker tripping while on propane
Even when AC was unplugged\


Per OP in post #3
"It's the 12 volt breaker that is tripping, so no dc to unit. unpluged and still trips."


So.....
What I am getting is that is has NOTHING to do with fridge fuses/controls etc
OPs problem is with the DC supply to fridge tripping




Course the confusion will be cleared up when OP responds

[Pappion]

I spent decades maintaining production equipment. Even multi-million dollar IC test systems.
Always check 1st that which is cheap and easy to check, even if it is a long shot.
Always look up the history for the model and failure symptoms.
After that you can do the 6 Sigma fish bone diagram and rank the likely culprits or ID what additional data is needed.
I will take a good 1st pass look at each of the culprits in turn. 2nd pass is a deeper look. 3rd pass is very detailed and time consuming.

Just my 2 cents.

[Old-Biscuit]

Originally Posted by Pappion

I spent decades maintaining production equipment. Even multi-million dollar IC test systems.
Always check 1st that which is cheap and easy to check, even if it is a long shot.
Always look up the history for the model and failure symptoms.
After that you can do the 6 Sigma fish bone diagram and rank the likely culprits or ID what additional data is needed.
I will take a good 1st pass look at each of the culprits in turn. 2nd pass is a deeper look. 3rd pass is very detailed and time consuming.

Just my 2 cents.

OK

[F451degrees]

apologies for the delay.


15A CB, it is possible that it is bad or weak.


after a few hours The CB (15 A) reset again and I started the frige on ac. ran that way all the way home.


Got home and emptied fridge and turned it to gas, ran fine without issues.


will replace the CB just for fun and hope it doesn't pop up again.


Thanks for the reply's and the info.


How do I find out if the recall was done, no info in coach documents?



Tom

[Old-Biscuit]

Originally Posted by F451degrees

apologies for the delay.


15A CB, it is possible that it is bad or weak.


after a few hours The CB (15 A) reset again and I started the frige on ac. ran that way all the way home.


Got home and emptied fridge and turned it to gas, ran fine without issues.


will replace the CB just for fun and hope it doesn't pop up again.


Thanks for the reply's and the info.


How do I find out if the recall was done, no info in coach documents?



Tom

SO this 15A CB is the DC TO the fridge?


As for Recall....don't think your model was ever part of the Recall
Check here
Official Dometic Recall - DometicUSA