Dometic Fridge Problem in a brand new unit
We have a 2021 Dynamax Isata 3 with a Dometic DMR-702 refrigerator that is acting up and could use some help from all of you experts on this topic. I have a request in to a warranty dealer to help wit...
Forum Discussion
sdtravis wrote:
@Old-Biscuit: Spark electrode is definitely suspect if in fact it returns a "hey a flame is present" to the control board. The error documentation on this leaves a lot to be desired, so based on my assumption those errors listed 1-3 aren't what I'm experiencing given both LP + temp flash (variably based on the setting, versus constant to the error). How would I know if that electrode is bad? A bad gap might also be a culprit too but would need to check the spec on that.
YES...spark electrode IS used for 'Flame Proving'
**Goggle -- Flame Rectification to see how
In the LINK i posted is the correct gap for spark electrode and position over burner
Pg 17
You can unplug it from transformer on the circuit board and check continuity
You can visually inspect the ceramic for any cracking...signal will go to ground vs returning to circuit board
You can physically check that the wire is not loose in the ceramic insulator
(High voltage can/does pass but milliamp current is easy to stop)
If flame has been incorrect ....fuel rich...then soot/carbon could be on electrode (clean it off with light sanding)
OTHER good info in that LINK also
