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Old 01-22-2022, 01:19 PM   #1
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Unhappy Dometic fridge ndr 1292 help!

Fridge is causing grief. Cooling unit repaired last summer as it was leaking. Now it works intermittently. I had it propane and it worked fine. I switched to electric and it worked 4 days and it was freezing the fins in fridge, adjusted temp, and then it stopped working. Turned it off for an hour and tried it on a/c didn't restart. Tried it on propane, lit, and starting working again. I tried switching back but wont work on a/c at all. It now wont work on LP. I have tested the thermoster with an ohmeter that senses hot and cold and appears to be working properly. Freezer maybe working slightly. Had a mobile repair guy out - looked at it for 3 minutes, said I don't know and $85 later for a service call no farther ahead. Any ideas and/or tips to try greatly appreciated.
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Old 01-22-2022, 01:33 PM   #2
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When you say it won't work on propane-- how far into the "runs on propane" does it get?


Nothing
Ignitor clicks
Gas valve opens
Flame-- if so for how long
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Old 01-22-2022, 02:13 PM   #3
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Dometic fridge ndr1292

Hi Wolfe10 - It runs continuously on propane it's burning but not cooling the unit down.
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Old 01-22-2022, 09:47 PM   #4
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What repairs were done last year when it was 'leaking'?

Propane runs continuously....not cooling
AC not working---do you mean it will NOT run on AC or that AC doesn't cool either? (AC Element gets hot but not cooling)

Freezer kinda cooling...food compartment NOT
*Bad thermistor.....even ones that check OK
(Unplug the thermistor leads from lower circuit board---P2 connector/white wires left side)
Run fridge for 12 hrs........
IF Fridge cools down replace thermistor (SNIP-THE-TIP Replcement)

IF fridge does NOT cool down then you will need to FORCE COOL it
Unplug heater element leads from Lower Circuit Board ---J7 & J8 terminals
Plug the 2 leads (both elements are wired in series) into the 120VAC Outlet (Test that outlet is Hot and just unplug fridge power cord)
Run for 12 hrs......elements will be energized continuously
Fridge gets cold....replace circuit board
Fridge does NOT get cold......COOLING UNIT IS BAD

**Suspect you will find out the cooling unit is BAD
Obstructed/blockage ---freezer gets cold/food compartment doesn't
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Old 01-22-2022, 10:27 PM   #5
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Quote:
Originally Posted by Old-Biscuit View Post
What repairs were done last year when it was 'leaking'?

Propane runs continuously....not cooling
AC not working---do you mean it will NOT run on AC or that AC doesn't cool either? (AC Element gets hot but not cooling)

Freezer kinda cooling...food compartment NOT
*Bad thermistor.....even ones that check OK
(Unplug the thermistor leads from lower circuit board---P2 connector/white wires left side)
Run fridge for 12 hrs........
IF Fridge cools down replace thermistor (SNIP-THE-TIP Replcement)

IF fridge does NOT cool down then you will need to FORCE COOL it
Unplug heater element leads from Lower Circuit Board ---J7 & J8 terminals
Plug the 2 leads (both elements are wired in series) into the 120VAC Outlet (Test that outlet is Hot and just unplug fridge power cord)
Run for 12 hrs......elements will be energized continuously
Fridge gets cold....replace circuit board
Fridge does NOT get cold......COOLING UNIT IS BAD

**Suspect you will find out the cooling unit is BAD
Obstructed/blockage ---freezer gets cold/food compartment doesn't



You have one of the BEST people giving advise here!
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Old 01-23-2022, 11:17 AM   #6
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Thanks so much for the tips. Woke up this morning and it’s working fine (3rd time) in as many weeks. I am not going to purposely shut it down at the moment but am sure by next week it will go again and I will apply your suggestions. For one moment thought the wife was shutting it down to give me something to do lol but she insists its not her.
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Old 01-23-2022, 06:35 PM   #7
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Cooling unit blockage doesn't go away on its own...

Suspect Thermistor or Circuit Board is the problem

Snip The Tip Rheostat replacement for thermistor
$30 Fix
https://www.snip-the-tip.com/cgi-bin/articca.cgi
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Old 01-23-2022, 10:35 PM   #8
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That's what happened to our Dometic NDR 1292. So we're trying to replace it. If it's not leaking you can purchase the cooling unit. We purchase one before but that's the one not working now. Good luck
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Old 01-25-2022, 01:05 PM   #9
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I had JC Refrigeration convert mine to compressor. Very pleased with the result.
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Old 01-25-2022, 10:40 PM   #10
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Thanks all. I have purchased a new circuit board and awaiting the next incident.
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