Foretravel Owners' Forum For owners and Fans of Foretravel Motorcoaches September 12, 2025 ...

23yo dometic fridge clicks between ac & lp

November 04, 2019, 04:22:40 pm

The original Dometic 3 way rm 3807 sometimes clicks and eyebrow lights go from ac to gas 10 or 12 times randomly. Im connected to park shore power. Replaced with new dinosaur main board sept. 2018.
Power watch shows 120v, 2 , 10 year old coach batteries show 13.4 volts. Don't know how to load short video here.
Fridge cools to 40. Drops to 35 in cool Yuma night.
My neighbor said he's had no power fluctuations

Quote Selected

Re: 23yo dometic fridge clicks between ac & lp

Reply #1 – November 04, 2019, 04:43:45 pm

Sounds like the burner and gas jet may need to be serviced. The dinosaur board really tries to fire the burner off. Just a guess. Or you may have a loose 12 volt connection in the back of the refrigerator. Also check the plug at the 120 volt outlet behind the fridge for corrosion on the plug.

Quote Selected

Re: 23yo dometic fridge clicks between ac & lp

Reply #2 – November 04, 2019, 04:47:06 pm

No, if plugged in and 120 VAC is making it to the refrigerator PC board, it should not ever try to light/switch to LP.

Might plug a light or something else into the outlet to verify that power doesn't go out.  Not uncommon for that 120 VAC outlet to get corroded as it is somewhat  exposed to the elements. OR, run an extension cord from a known good outlet and see if the refrigerator continues to "act up".

I would open the cover to the PC board and confirm that the small 120 VAC fuse is OK and connections to the board are tight.

Quote Selected

Re: 23yo dometic fridge clicks between ac & lp

Reply #3 – November 04, 2019, 08:35:24 pm

Great advice guys, thanks very much!!

Quote Selected

Re: 23yo dometic fridge clicks between ac & lp

Reply #4 – November 05, 2019, 10:19:21 am

Brett is right. If the fridge is set on Auto it should always use the 120v when plugged in. If it tries to switch to gas there must be something up with the 120v. As Brett said unplug in access panel and plug into a known good 120v source with extension cord. You might try switching to gas just to see if it stays. If it doesn't I'd have to suspect the dinosaur board even if it is only a year old.

see ya
ken

Quote Selected

Re: 23yo dometic fridge clicks between ac & lp

Reply #5 – November 05, 2019, 10:46:31 am

I had exactly the same problem this summer. I also have a dinosaur board that is about a year old. I called the dino board people and was able to talk to someone that knew what they were doing right away. He told me to check all my connections, especially grounds. The connections all looked good, but I cleaned and tightened all of them and it works fine now. He said to call him back if that did not fix my problem. Good company. When the problem first started I thought that it was the RV park electric or my 110 system that was causing the problem, but they checked out OK.

Quote Selected

Re: 23yo dometic fridge clicks between ac & lp

Reply #6 – November 05, 2019, 12:14:56 pm

If I'm not mistaken the fridge requires 12v for the control boards. With that said while checking the grounds the 12 volt and the 120v systems might as well clean the burner and jet.

Quote Selected

Re: 23yo dometic fridge clicks between ac & lp

Reply #7 – November 05, 2019, 12:22:19 pm

Bruce makes a good point about checking that the 12 VDC connections are good and tight and when it happens, would be a good idea to go out and check for 12+VDC at the connections on the back of the refrigerator.

Quote Selected

Re: 23yo dometic fridge clicks between ac & lp

Reply #8 – November 06, 2019, 05:36:42 pm

Again,  all great advice and ideas gentlemen.

Quote Selected

Re: 23yo dometic fridge clicks between ac & lp

Reply #9 – November 14, 2019, 04:07:06 pm

Quick follow-up,  all 3 fuses good. 110v at receptacle, plus clean power plug prongs.
12v to board.  Correct power,at board terminals.
Switches to lp fine.
When I push on eyebrow upper inside board, in AC power,  i can duplicate the problem. CAN'T duplicate problem running lp,pushing on eyebrow.
i just called Chris tech at Dinosaur , as you prolly know, they don't sell my eyebrow board. He surmises the 23yo plastic ac/gas button is wearing out.
Idk if contact cleaner spray will work, like my 4 button duotherm thermostat.

Quote Selected