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Open Roads Forum  >  Tech Issues

 > Looking for Dometic DMR702 service manual

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MalibuDave42

Colorado

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Posted: 09/13/20 11:39am Link  |  Quote  |  Print  |  Notify Moderator

I have been having a lot of trouble with my fridge. The pattern seems ambient temperature related. During the cool nights in the CO mountains off the grid, the unit would not run until about 10am. This past week it snowed about 10" and stayed near or below freezing for several days. It would not ignite these cold days. Now back in the warmth, I see the igniter wire is pretty crispy where it enters the ceramic piece of the igniter. Not sure the will solve the problem, but time to replace regardless.

Not sure this matters.. furnace worked fine, stove, hot water heater -- all good. End of the propane line is the fridge. There was also about 1/8" of frost below the propane level in the tank I was using at the time.

Two questions for the group:
1. Where can I find a service manual to ensure I get the right part(s) when needed?
2. Any thoughts on my sporadic fridge?

Thanks
Dave

shastagary

minnesota

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Posted: 09/13/20 12:03pm Link  |  Quote  |  Print  |  Notify Moderator

good diagnostic manual it covers multiple models no parts list though

Dometic's Manual Refrigeration Diagnosis

MalibuDave42

Colorado

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Posted: 09/13/20 12:09pm Link  |  Quote  |  Print  |  Notify Moderator

Nice doc to have on hand. A few parts numbers, but none for the igniter. Thanks for passing along, though.

Dave

Old-Biscuit

Verde Valley

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Posted: 09/13/20 12:22pm Link  |  Quote  |  Print  |  Notify Moderator

Installation/Operation Manual
Clearances for installation/Component ID/Wiring Diagram etc
DMR702/DMC702 Manual

Parts.........
NO PARTS LIST Available
Even Dometic doesn't list any Renaissance Series Parts (DMR702/DMC702)
Renaissance Parts

Looks like a Call to Dometic is in order.....
Have Product Number and/or SKU Number available (on data sticker


As for that Spark Electrode
That wire MUST be intact
It carries the High DC Voltage that ignites the gas BUT it also is part of the flame proving circuit (milliamp signal that circuit board senses ---- no signal/DC is shutoff to gas valve)

Dometic 2932781012 (Part number for spark electrode used on NUMEROUS Dometic Fridge Models....17" Lead)

* This post was edited 09/13/20 12:32pm by Old-Biscuit *


Is it time for your medication or mine?


2007 DODGE 3500 QC SRW 5.9L CTD In-Bed 'quiet gen'
2007 HitchHiker II 32.5 UKTG 2000W Xantex Inverter
On the Road Debt Free April '07
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MalibuDave42

Colorado

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Posted: 09/13/20 12:45pm Link  |  Quote  |  Print  |  Notify Moderator

I've seen that part number around the web. The part sure looks the same. But as you point out, call to Dometic to confirm would save me aggravation in the long run. Wierd business model.. keep the part list secret to reduce customer satisfaction :-)

Interesting point on the Spark Electrode. You are saying it's two-in-one sparker AND thermocouple. Correct?

Do you feel this could be related to my apparent ambient temperature issue?

dougrainer

Carrolton, Texas

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Posted: 09/13/20 01:11pm Link  |  Quote  |  Print  |  Notify Moderator

MalibuDave42 wrote:

I've seen that part number around the web. The part sure looks the same. But as you point out, call to Dometic to confirm would save me aggravation in the long run. Wierd business model.. keep the part list secret to reduce customer satisfaction :-)

Interesting point on the Spark Electrode. You are saying it's two-in-one sparker AND thermocouple. Correct?

Do you feel this could be related to my apparent ambient temperature issue?


AS long as the refer stays lit and does NOT throw a red light or error code, the Ignitor will have NOTHING to do with cooling problems. Kind of like saying, I have a slightly burnt Spark Plug wire and my Dash AC does not cool correctly. NOT related. Doug

MalibuDave42

Colorado

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Posted: 09/13/20 01:25pm Link  |  Quote  |  Print  |  Notify Moderator

Reaching for straws... wires don't work as well when cold, so trying to connect the dots.

Thanks for the insights -- unrelated, got it. Thoughts on what it could be?

Dave

Old-Biscuit

Verde Valley

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Posted: 09/13/20 04:00pm Link  |  Quote  |  Print  |  Notify Moderator

You posted
"It would not ignite these cold days. Now back in the warmth, I see the igniter wire is pretty crispy where it enters the ceramic piece of the igniter."

Sure seems like electrode issue

YES electrode provides dual function
Ignition and flame proving boa Flame Rectification ( electrical process that causes a low level DC current to be conducted from the flame rod through the flame, and back to ground---circuit board senses this dc current)
Your model doesn't use a thermocouple


Maybe DOUG can post up a part number for your spark electrode

MalibuDave42

Colorado

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Posted: 09/14/20 10:15am Link  |  Quote  |  Print  |  Notify Moderator

Talked with Dometic this morning. They confirmed the igniter part number for the DMR702 is the same as Old-Biscuit stated: Dometic 2932781012.

The rep took the time to screen shot the exploded parts view including part numbers and emailed them to me. I am happy to share, but don't know how to post it here.

Thanks for all of the insights and help!!
Dave

sdtravis

Encinitas

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Posted: 01/10/21 06:47pm Link  |  Quote  |  Print  |  Notify Moderator

Dave I’m having the same ambient temperature issue with my DMR702 fridge. Curious if you solved the problem with the new electrode.

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