Forum Discussion

Explorer

Jun 10, 2020

Dometic RM2652 5A fuse keeps blowing

I have an older RM2652 (product number: 921 14 40-02 if that helps). It will run on gas just fine, but when I try to run it on AC the 5A fuse that leads to the AC heating element will blow. I’m trying to determine if I need to replace the circuit board or the heating element. Or possibly something else? If the parts weren’t so costly I’d just shotgun it and replace both components, but I need to be deliberate about what I replace with this. Thanks in advance for any help!

13 Replies

stickdog
Explorer
Jun 10, 2020
itsjustjer wrote:
Just to update: I checked the heating element and it’s 37.4 ohms. The spec in the manual says 44. Am I likely too far out of spec?

I would say so.
itsjustjer
Explorer
Jun 10, 2020
Just to update: I checked the heating element and it’s 37.4 ohms. The spec in the manual says 44. Am I likely too far out of spec?
BFL13
Explorer II
Jun 10, 2020
Unplug the 120v input cord from the circuit board and check that cord. It may be shorted somewhere. Check where the green wire from it is screwed to the chassis by the plug to the board.

Un-do the 120v element from the board and check that. You can run the element directly using a made-up adapter by-passing the board to see if it heats up ok. All the board does is provide a thermostat to control the heat element to be on and off.