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jomarex's avatar
jomarex
Explorer
Dec 09, 2015

warming Dometic 2652 fridge - unplugged wire?

Took a picture, have no idea how to upload it from the smartphone, esp. with sporadic internet...

Domestic 2652, been running it on propane and it was working great, then the check light came on. No other propane issues.

It's been slowly getting warmer for a week or two. I turn it off and back on several times a day; it pops a few times and then the check light comes back on.

There's a little blue wire (in a bundle coming out of the top left corner of the fusebox) that's not plugged into anything. Should it be?

When I turned the switch on and watched , this time I do t see a flame at all. Heard one loud click, smelled a little propane, then after awhile, it started the little ignition clicks. Still no flame. Unless my ears are a lot worse now, it seemed like the ignition clicks soi fed weak...

Any pointers?
Thanks
  • jomarex's avatar
    jomarex
    Explorer
    Dec 12, 2015
    Aaaaand, the check light was back on the next morning. Think I found the problem, though.

    Didn't help to leave the switch off all day. Got fed up and was going to try to manually light it, even if it blew the dang RV up.

    It did make a scary loud poof, maybe blew itself out. As I sat there in the dark, I saw tiny little sparkings running along the metal pipe in the back, everywhere the *insulated* igniter wire was touching it! Strung some electrical tape around to keep the thinly-insulated little wire from touching any metal.

    Fridge fired right up. I should've listened to myself when I recalled that I had been wiggling that igniter wire, right before the fridge started working yesterday...
  • jomarex's avatar
    jomarex
    Explorer
    Dec 11, 2015
    Well hunh. Been reading stories about how these fridges have little squirrelly minds of their own.

    Turned the switch off last night, was going to try to light it with a grill lighter this morning. Turned the switch on, and it lit immediately with that first loud clunk.

    Seems like the problem started about the same time as the solar-charged battery low voltage problem. Good battery voltage did not help the fridge.

    Had left the switch off a few times for an hour or two, hoping it would somehow reset itself. Maybe it just needed the whole night to think about it...
  • jomarex's avatar
    jomarex
    Explorer
    Dec 10, 2015
    The electrode looks clean, and I scrubbed it a little. I can hear it clicking; doesn't that mean it's sparking? Got too scared to leave all those covers off so I could look at the spark...

    My ears really aren't too dependable anymore.
  • Old-Biscuit's avatar
    Old-Biscuit
    Explorer III
    Dec 10, 2015
    jomarex wrote:
    Burner did have a bunch if **** in it; cleaned it out, no change...

    The bottom of the exhaust pipe, and the sheet metal parts directly under it, are rusty. Could there be something about that keeping it from lighting?


    As suggested did you clean the spark electrode and reset spark gap?

    'SPARK' S/B Strong and loud click.
    If not ......low DC voltage, dirty connections on spark electrode wire, loose/dirty ground or voltage tracking due to cracked ceramic
  • jomarex's avatar
    jomarex
    Explorer
    Dec 10, 2015
    Burner did have a bunch if **** in it; cleaned it out, no change...

    The bottom of the exhaust pipe, and the sheet metal parts directly under it, are rusty. Could there be something about that keeping it from lighting?
  • Chris_Bryant's avatar
    Chris_Bryant
    Explorer II
    Dec 09, 2015
    The blue wire is a test wire- doesn't hook to anything. Try removing the electrode, lightly sanding the metal tip, then wipe the ceramic down with a paper towel soaked in silicone lube. Reinstall, setting gap at 3/16".
  • enblethen's avatar
    enblethen
    Nomad
    Dec 09, 2015
    Upper left corner is where the thermistor plugs in.
    Another plug is the control panel.
    I believe the blue wire plug is the thermistor.
    This may help
    RM2652
  • 2oldman's avatar
    2oldman
    Explorer II
    Dec 09, 2015
    It's Dometic. Probably dirty burner. Check youtube.. if you get a connection.

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