I had to get one for my brand new Dometic back in 2019. Costs a bit more now than it did back then.. I think I only paid $100 for it back then.. Got it from the Jungle store. Looks like it's still in stock if it's one of these model numbers.
Mitch
Dometic (3316348.900) Power Module Board , Black
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4.4 4.4 out of 5 stars 842 ratings | 245 answered questions
$167.85
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Brand: Dometic.Fit Type: Universal Fit
Item Model/Part Number: 3316348.900. The individual number for the cover/power control piece is 3316348.000
Made from high quality, durable materials. LTL Freight : No
Designed for quick and simple application
This is the dometic power module board with re-ignitor and works with most models. Below is a list of the Dometic models that this board works with: DM2652; DM2662; DM2663; DM2852; DM2862; DM3862; NDM1062; NDR1062; RM2351; RM2354; RM2451; RM2454; RM2551; RM2554; RM2620; RM2652; RM2662; RM2820; RM2852; RM2862. With Power Board: Yes