Good Sam Club Open Roads Forum: Dometic NDA1402 Cooling Fin Heating Element
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 > Dometic NDA1402 Cooling Fin Heating Element

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dgreen1069

Warrenton, VA

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Posted: 04/09/22 08:15pm Link  |  Quote  |  Print  |  Notify Moderator

My rig has a Dometic NDA1402 refrigerator. When I turned the fridge on this afternoon I got error code 12. According to the service manual, error code 12 means there is a problem with the refrigerator side cooling fin heater element. I checked the element with a multimeterand found an open circuit (no resistance). I should be seeing 3 to 4ohms. Long story short, I have determined it needs to be replaced.

Looking online, it appears the part (3850674015) is discontinued and unavailable everywhere I have looked. I would HATE to replace the entire fridge for this one simple part. Has anyone else run into this problem? Can I use a different heater element to accomplish the same task and fool the fridge into working?

Does anyone know if I could simply add a jumper in place of the heating element to trick the refrigerator into working? If this is a bad idea or dangerous, please let me know. I am just brain storming at this point.

* This post was edited 04/09/22 08:35pm by dgreen1069 *


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craig7h

Branson MO area

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Posted: 04/10/22 03:58am Link  |  Quote  |  Print  |  Notify Moderator

The rig in your signature says 03, I would say the frig could use some help.

In my 07 the frig (norcold) up and died while on a trip. I also did not want to really replace the frig. I did however looks at replacing with residential ones. To much wood work for my to make it look like it belonged so that was out. A new norcold same size would mean taking the windshield out to get the frig in. So that was out.

I ended up going with new cooling unit from JC Refrigeration. https://jc-refrigeration.com/
I changed my old cooling unit for their 120v only unit as I do not boondock and am alway plugged in.
I am very happy with the unit and JC customer support is spot on great folks to work with.

Good Luck


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dgreen1069

Warrenton, VA

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Posted: 04/10/22 04:33am Link  |  Quote  |  Print  |  Notify Moderator

Thanks for the reply. My signature needs to be updated an I can seem to figure out where to do that. I have a 2009 Discovery 40x now. I may have to look at that option, but for the cost I may just go residential if it comes to that. I’d get a big boost in capacity for just a little more money.

dougrainer

Carrolton, Texas

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Posted: 04/10/22 11:54am Link  |  Quote  |  Print  |  Notify Moderator

Other than the Fail code, have you seen abnormal icing on the fins? I would not throw away a good functioning refer just because a defrost element has failed. Even with the Fail code, the refer should still be functioning. Doug

This is what I have replaced over the years as the most common defrost failure. It may be able to be used in place of the discontinued part. Just have to modify how it is installed.

https://rvpartsexpress.com/product/domet........-3851411011-heating-element-water-drain/

dgreen1069

Warrenton, VA

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Posted: 04/10/22 07:39pm Link  |  Quote  |  Print  |  Notify Moderator

dougrainer wrote:

Other than the Fail code, have you seen abnormal icing on the fins? I would not throw away a good functioning refer just because a defrost element has failed. Even with the Fail code, the refer should still be functioning. Doug

This is what I have replaced over the years as the most common defrost failure. It may be able to be used in place of the discontinued part. Just have to modify how it is installed.

https://rvpartsexpress.com/product/domet........-3851411011-heating-element-water-drain/


The crazy thing is that the refrigerator DOES NOT function with an error code....at least not error code 12. I have never seen icing on my cooling fins, so I am not even concerned about the absence of the heater.

I purchased a 12v 50w heating pad from Amazon that is designed as an oil pan warmer. That should give me the 3-4ohms of resistance the computer board is looking for at start up. I am hoping the heater pad tricks the computer board into thinking all the right parts are there so the fridge turns on. I am not a full timer, so frozen coils aren't an issue for us. We rarely camp for more than two weeks at a time.

dougrainer

Carrolton, Texas

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Posted: 04/11/22 08:49am Link  |  Quote  |  Print  |  Notify Moderator

dgreen1069 wrote:

dougrainer wrote:

Other than the Fail code, have you seen abnormal icing on the fins? I would not throw away a good functioning refer just because a defrost element has failed. Even with the Fail code, the refer should still be functioning. Doug

This is what I have replaced over the years as the most common defrost failure. It may be able to be used in place of the discontinued part. Just have to modify how it is installed.

https://rvpartsexpress.com/product/domet........-3851411011-heating-element-water-drain/


The crazy thing is that the refrigerator DOES NOT function with an error code....at least not error code 12. I have never seen icing on my cooling fins, so I am not even concerned about the absence of the heater.

I purchased a 12v 50w heating pad from Amazon that is designed as an oil pan warmer. That should give me the 3-4ohms of resistance the computer board is looking for at start up. I am hoping the heater pad tricks the computer board into thinking all the right parts are there so the fridge turns on. I am not a full timer, so frozen coils aren't an issue for us. We rarely camp for more than two weeks at a time.


If the resistance pad does not work, then plugging in the Part I listed, may "fool" the system with its resistance. Doug

LittleBill

Scranton, PA USA

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Posted: 04/11/22 10:49am Link  |  Quote  |  Print  |  Notify Moderator

why not just buy a 10 cent 4 ohm resistor?





dgreen1069

Warrenton, VA

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Posted: 04/11/22 08:18pm Link  |  Quote  |  Print  |  Notify Moderator

LittleBill wrote:

why not just buy a 10 cent 4 ohm resistor?


I thought about that, but I wasn't sure if a small resistor could survive the 4amp load from the circuit.

The heating pad I added seems to have worked. The fridge fired up as normal and I am waiting to see if it cools. The good news is, no more error code. I could not mount the heating pad in the exact space the previous heater was, but hopefully it won't matter. The new pad is on the back of the cooling fins, but towards the top due to screw holes in the middle. At 50w, I'm hoping the pad doesn't get hot enough to damage anything.

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