Hi all,A few weeks back, we took delivery of a brand new 2019 Jayco Jayfeather X23E. Our first camping trip was on a hot weekend, and the A/C (Dometic Brisk II) struggled to cool the interior. But it wasn't running flat-out. Even with the temp set to full-cold and the fan set to 3, it would alternate between A/C and fan-only every few minutes.So I popped the filter cover and noticed that there was lots of cold air leaking into the intake side, blowing right onto a copper thingy (temperature sensor?) that is hanging down:The unit stays in A/C mode for as long as I put my hand around this copper thingy.The air leaks appear to be shunting around the cold/intake divider along where Jayco boxed in the roof opening with a Luan-like material:(The paper towel in the second picture was an attempt to plug one of the gaps where cold air was blowing in.)Should I just take this back to the dealer and ask them to properly isolate the cold side from the intake side? I've read about coil freeze sensors and stuff too - I guess they'll check all that out?Thanks in advance!

You can take it back for warranty or save the time and trouble. BY, using AC foil tape and seal those areas. That is what the dealer will do under warranty. Doug

dougrainer wrote:You can take it back for warranty or save the time and trouble. BY, using AC foil tape and seal those areas. That is what the dealer will do under warranty. DougI feel like at the very least, the plastic part below the roofline (air distribution box?) should be dropped to get proper access to all that stuff. It looks like some wood screws around the perimeter and two bolts behind the intake cover. Is this reasonably straightforward for a DIYer?

Seal it up. The "copper thingy" is your thermostat sensing bulb.

Do it yourself. A quick fix and not worth the hassle with the dealer. Plus, you'll know it's done right

X2 they don,t know how to do it right,, just fast.

Poor Dometic A/C on 2019 Jayco Jayfeather X23E | Good Sam Community

marcsbigfoot20b
Explorer
Oct 13, 2018
Slightly important piece of info is missing....

What is your cold air output temp?
What is the delta......comparing air in to air out?

If you are only blowing lets say 68 degrees, or 55 degrees? this may help indicate which way to look. Blowing so cold (due to air remix) it is short cycling? Bad sensing bulb?
chrispitude
Explorer
Oct 14, 2018
marcsbigfoot20b27 wrote:
Slightly important piece of info is missing....

What is your cold air output temp?
What is the delta......comparing air in to air out?

If you are only blowing lets say 68 degrees, or 55 degrees? this may help indicate which way to look. Blowing so cold (due to air remix) it is short cycling? Bad sensing bulb?

The delta T is the difference between the inside (darker) and outside (lighter) temperature curves. They are superimposed on the same graph.

Yes, I should have measured outlet temperature! I will get a reading on the next comparably warm day. With the crazy fall we've been having, that shouldn't take long.
chrispitude
Explorer
Oct 19, 2018
Looks like I'm not going to get any A/C-testing weather for the rest of the year. I'll wake this thread back up once I have more to report.

Thanks to everyone for your thoughts!
dougrainer
Nomad
Oct 19, 2018
chrispitude wrote:
dougrainer wrote:
While you have a lot of testing info. It does not really help. The SIMPLE thing is to have a qualified Dometic Service center do
1. Temp corrected amp draw of the compressor. This will tell you if the system is correctly charged and operating correctly for cooling
2. Verify and seal off those areas you stated the foil tape seemed to NOT be sealed correctly still.
3. Verify the Temp probe for the tstat is in the correct place. Doug

Respectfully, I disagree that my testing did not help. It confirmed that all the stuff you said is necessary. :)

You did a lot of testing. But, it was a waste of time. But, it helped you figure out certain things. AND, you had the time to waste. What I stated to do would tell you in 15 minutes what all your testing failed to do. I did not mean to fault you personally, but your testing was not what you do in the real world. Doug

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