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EstorilM's avatar
EstorilM
Explorer
Aug 04, 2017

New TT and Dometic refer/freezer is dead on AC?!

I JUST got this TT as a "used" 2016 a month ago with basically zero miles on it.

Our two trips totaling about 1400mi (incl. going to buy it) have been fine, but now that we're back at home after the last trip, apparently the fridge isn't happy now.

I've turned it off / on again and reset the power, and after about 5 minutes or so the "check" light turns on. It's been WARM the past two days, as in zero cooling at all.

At the camp sites and such it was fine, including the 10hr trips when I used propane, it was also fine. This seems to be something recent since we came back. All other AC devices are working fine.

I have a warranty on the TT but REALLY don't want to haul it over to the nearest $tealership and have them running around inside of it guessing.

Has anyone else encountered this? FWIW it's a Dometic DM2652LBx according to the build sheet.

19 Replies

  • Open the outside cover
    You will see the 120v outlet

    If outlet has power unplug fridge and check fuse on control board

    After that it is either the control board
    Or
    The 120v heating element in the stack

    Some people have a phobia about Lp gas

    Better off saying up front
    It works on gas, but i won't run it that way
    In the first post, and getting that out of the way
  • I don't know your nearest dealer, maybe you've had a bad experience with them, but that's the first place I'd go with a new unit under warranty. The shouldn't charge you one dime for a warranty repair.
  • Old-Biscuit wrote:
    EstorilM wrote:
    I've checked most of this but not all (thanks for the quick replies!)

    It's definitely plugged in to 120VAC right now (batt full) and everything else works fine, all the breakers are fine as well. I haven't actually pulled the cover and checked for power at the refer plug, but I'll do that tomorrow.


    I'm pretty sure propane is fine, but I haven't pressed the propane button as I just got this thing and don't entirely trust it yet (I know, it's stupid - but if it's plugged in I just leave the gas button off.. can't hurt)

    I'll check propane just out of curiosity, but again I didn't press the button so that's probably a different issue. I need the thing to be working on AC anyways. :(

    It is level on all axis.

    It seems strange to me that it takes about 5 minutes for the "check" light to illuminate. I feel like that's probably NOT a good sign if it's trying to run on AC.

    Edit: FWIW after about 15 seconds of turning the switch ON again, I can hear a click or two in the back of the refer unit. Not sure if this is significant or not, but it appears to have power.


    In all the paper work when you bought this new/used....zero mile TT did you get the manual for fridge?

    Now would be a GOOD time to read it and HOW fridge operates.

    In 'AUTO' firdge controls select AC 1st.
    If AC NOT available..swaps to GAS
    'Check' Light comes on after fridge tries to light main flame and fails 3 times

    IF you select GAS....that is the only mode fridge will attempt to run on. 3 tries....'check' light

    Clicking could be AC heater relay making up
    OF
    spark electrode firing lighting off propane cause AC not available

    Manual...READ IT


    Easy killer.

    Yes I have both the installation manual as well as the user manual, and have read both (in addition to being familiar with these types of units).

    Speaking of READING as you say.. if you read my posts, you'd realize that 1) it's been working fine on AC power till now - it's not "user error" and 2) I have no desire to use propane while it's plugged in at the house. I can SEE if it'll work on gas, but at the end of the day if AC is inop then I've got problems. 3) Click noise wouldn't be ignition / spark, as I said the GAS button was not enabled/depressed.

    You're also incorrect about the check light - the "gas" button hasn't been depressed at all during this entire process, yet after ~5 min the "CHECK" light comes back on, AC power only. In addition to a failed ignition attempt as you mention, it appears the unit will display "CHECK" for AC-related faults or other problems.

    You also seem to be confused about the GAS button as you say
    IF you select GAS....that is the only mode fridge will attempt to run on. 3 tries....'check' light
    "
    With GAS button depressed, the unit will always attempt AC first, not gas only as you say. Pressing the GAS button is the only way to enable AUTO function/illuminate AUTO light on this unit (and all others I've seen).

    The manual is for ~8+ different Dometic models by the way, some of which have different switch and light configs. Mine's the normal 2-way. ON/OFF switch, and GAS switch (which turns on AUTO light, blah blah, now it can choose which is available).


    Anyways - the manuals don't want you to touch anything.. typical. Troubleshoot guide says "If unit fails to cool, turn off immediately and call dealer"

    Mention of a fuse, which they also tell you to call dealer for. This obviously for DC power, and since the DC-powered controls work it's probably not that.

    Didn't get a chance to check for AC at the plug yesterday, where would it be? (outside access panel or underneath / kick panel?) Again breakers all fine.

    30-day dealer warranty expired like 4 days ago. Dometic may have a warranty but probably 1-yr and expired as it's a 2016, which leaves me with the Keystone warranty (probably dead too or not transferred) and my extended warranty, which does cover the unit but has a decent-size deductible and nothing else is really broken on the TT.

    I'll tinker with it tonight, check AC, plus anything else you all might suggest - in addition to seeing if it works on propane just for the hell of it.
  • EstorilM wrote:
    I've checked most of this but not all (thanks for the quick replies!)

    It's definitely plugged in to 120VAC right now (batt full) and everything else works fine, all the breakers are fine as well. I haven't actually pulled the cover and checked for power at the refer plug, but I'll do that tomorrow.


    I'm pretty sure propane is fine, but I haven't pressed the propane button as I just got this thing and don't entirely trust it yet (I know, it's stupid - but if it's plugged in I just leave the gas button off.. can't hurt)

    I'll check propane just out of curiosity, but again I didn't press the button so that's probably a different issue. I need the thing to be working on AC anyways. :(

    It is level on all axis.

    It seems strange to me that it takes about 5 minutes for the "check" light to illuminate. I feel like that's probably NOT a good sign if it's trying to run on AC.

    Edit: FWIW after about 15 seconds of turning the switch ON again, I can hear a click or two in the back of the refer unit. Not sure if this is significant or not, but it appears to have power.


    In all the paper work when you bought this new/used....zero mile TT did you get the manual for fridge?

    Now would be a GOOD time to read it and HOW fridge operates.

    In 'AUTO' firdge controls select AC 1st.
    If AC NOT available..swaps to GAS
    'Check' Light comes on after fridge tries to light main flame and fails 3 times

    IF you select GAS....that is the only mode fridge will attempt to run on. 3 tries....'check' light

    Clicking could be AC heater relay making up
    OF
    spark electrode firing lighting off propane cause AC not available

    Manual...READ IT
  • There is fuse in the PC board in back of the fridge. Check that for the heck of it. (Open the vent cover on the side of the trailer and look at the back of the fridge and find the PC board.)
  • I've checked most of this but not all (thanks for the quick replies!)

    It's definitely plugged in to 120VAC right now (batt full) and everything else works fine, all the breakers are fine as well. I haven't actually pulled the cover and checked for power at the refer plug, but I'll do that tomorrow.


    I'm pretty sure propane is fine, but I haven't pressed the propane button as I just got this thing and don't entirely trust it yet (I know, it's stupid - but if it's plugged in I just leave the gas button off.. can't hurt)

    I'll check propane just out of curiosity, but again I didn't press the button so that's probably a different issue. I need the thing to be working on AC anyways. :(

    It is level on all axis.

    It seems strange to me that it takes about 5 minutes for the "check" light to illuminate. I feel like that's probably NOT a good sign if it's trying to run on AC.

    Edit: FWIW after about 15 seconds of turning the switch ON again, I can hear a click or two in the back of the refer unit. Not sure if this is significant or not, but it appears to have power.
  • Nice set up in your picture :B


    If plugged in at home....should be able to run on electric.
    Place in 'AUTO'....no AC it will swap to GAS
    'Check' Light coming on....means no main flame----propane???


    Fridge..
    Is trailer level where parked?

    120V AC....
    Verify you have AC power at outlet fridge cord plugs into

    12V DC...
    You have DC power or display panel would not be working

    Propane...
    Did you valve it out when you got home?
    Cylinder go empty?
    Do ALL stove top burners ON HIGH burn strong, same height?
  • Have you made sure there's still 120 to that outlet? Something could have tripped or a GFCI may be interupting power to that particular outlet.
  • Make sure your battery is fully charged. The circuit board on the fridge will not operate if voltage is low.

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