So hear is an issue I'm having since day 1 of owning my camper. The first time we needed to use the heat, I was woken up by this relay clicking in my rooftop AC unit when needing heat. The clicking was lasting for about 30 seconds and then the blower would turn on and then the flame would ignite.
The clicking would then start again about 30 seconds before the heat would shut off. I basically knew because of this clicking when it would turn on and turn off and it would wake us up several times throughout the night.
Here is where it gets more confusing... this would only happen when the camper was maintaining a temperature that I had set. So example, if I had it set at 72*, it would only do this clicking when it would cycle on and off to maintain the 72*.
If I would go to the thermostat and change it to 73*, it would immediately call for heat and not do the clicking.
While the many times being at camping world for all of my punch list issues, the tech (I've known him for years) found a ground lose and thought that maybe the clicking was due to the ground not making contact at all times. However due to knowing me, he had domestic send him a new control board which apparently everything including the relay is on the control board.
We thought everything was fine until I needed to use my heat for the 1st time this year Labor Day weekend. I was again woken up by this in the middle of the morning but couldn't get my phone out in time to record it.
I decided to sit on the couch until it needed to cycle again and got this on video. Although it is 3 minutes long, watch it especially as it gets to over the 1 minute mark. There is no pattern to the clicking but it is very loud and annoying.
I've just emailed Dometic with a link to my video to see what they say. I'm wondering if it is as simple as a faulty thermostat... not sure what else it could be. This is a ducted AC unit (15k).
The tech at Camping World replaced the control board but did not replace the thermostat. They did troubleshooting with Domestic and this is what their suggestion was.
So just to update, I ended up replacing the thermostat on my own. Got it for about $30 out of pocket. Domestic responded back that they are unable to watch the video, my guess is a a firewall. They just sent me back to the dealer.
Talked with service manager today who I know and showed him the video.. he has never seen anything like it before. So new control board with relay, new thermostat.. will attempt my camping trip on Columbus Day weekend to see what happens.
Didn't want to drop it off, waste their time with them trying to troubleshoot especially if the problem is resolved. Plus it may stay their for a week or two.. Just not worth the headache over $30 if this solves it. If not, well then we have eliminated the thermostat and we are back to the AC unit.
So just to update, I ended up replacing the thermostat on my own. Got it for about $30 out of pocket. Domestic responded back that they are unable to watch the video, my guess is a a firewall. They just sent me back to the dealer.
Talked with service manager today who I know and showed him the video.. he has never seen anything like it before. So new control board with relay, new thermostat.. will attempt my camping trip on Columbus Day weekend to see what happens.
Didn't want to drop it off, waste their time with them trying to troubleshoot especially if the problem is resolved. Plus it may stay their for a week or two.. Just not worth the headache over $30 if this solves it. If not, well then we have eliminated the thermostat and we are back to the AC unit.
We shall see in a few weeks.
Here we are close to 2020 and this issue with Dometic thermos is still happening. Are these units easy to replace and is there any special requirements for the replacemennt?
Here we are close to 2020 and this issue with Dometic thermos is still happening. Are these units easy to replace and is there any special requirements for the replacement?
If by easy to replace, you mean with an "in kind" replacement, then yes they are very easy to replace. However if you're wanting to replace them with a residential or different mfg. unit, then NO they're not easy to replace at all.
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Salem 29RKSS Pushing a GMC Sierra 2500HD!
Gotta go campin!
Here we are close to 2020 and this issue with Dometic thermos is still happening. Are these units easy to replace and is there any special requirements for the replacemennt?
No clue about other brands but I have not had another issue since I replaced it.
I bought a replacement thermostat that ran on batteries but when I got it home I sensed (didn't say in the manual) that the batteries were just for the display and the 24V replacement would damage the 12V circuit board. Rather than take that risk I returned it and prepared myself for the $140 OEM one. Meanwhile I
Reset the original Dometic one.
Changed the 1F temp differential back to the default 2F
Changed the A/C set temp to 80F
In doing step 1 it stopped the motor run on. Steps 2 and 3 stopped the system from sending a heat signal to the A/C and the clicking noise. I now have a working thermostat.
The owners manual outlines how to do the above 3 steps and only after that would I consider a replacement.
Linear Mode
