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Old 01-20-2022, 12:32 AM   #1
Junior Member
Join Date: Jun 2014
Posts: 5
Dometic thermostat

Baystar 2018. I tried to turn on heat pump and myThermostat had an e1 code showing. Tried a reset and showed 2 and 4 for zones and only a/c and off worked on screen but couldn't change temps or make it work. I followed an internet suggestion of shutting down power 15 minutes. Then then I had a completely dark blank screen. Checked breaker and fuse in bath and they they were good.
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Old 01-20-2022, 02:25 PM   #2
Join Date: Jul 2016
Location: Huntsville, AL
Posts: 37
We just experienced the same thing for the 2nd time in the past couple of years. Each time, replacing the thermostat with a new one fixed the problem. Resetting, etc. did nothing. The first replacement lasted about 2 years before the problem recurring.

When it happened again about a week ago, the wall it was attached to was very hot from the sun and we found condensation on the back of the thermostat. The hole behind the thermostat is fairly large and there is a metal bar in the wall that was extremely hot. We decided to close that hole up as much as possible and mount the thermostat where it isn't exposed directly to the insulation through the hole in the wall to hopefully protect it from extreme temperatures.

We intend to carry a spare with us from now on as we might not be near a place with parts the next time it happens.
2016 Newmar Baystar 3124
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Old 01-23-2022, 06:39 AM   #3
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Location: Titusville, FL
Posts: 5,116
I always turn that thermostat off when changing incoming power sources. They don't seem to like changing A/C sources while operating.
When seconds count, the police are only minutes away.
2023 Grand Design 2600RB, 2013 Nissan Platinum Armada tow vehicle, Titusville, FL when not on the road
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Old 01-23-2022, 10:21 PM   #4
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Fixed by replacement

After talming to Newmar and one answer on the forum. I purchased a new thermostat ,replaced old one, and it works perfectly.
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Old 01-25-2022, 11:23 AM   #5
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Newmar Owners Club
Join Date: Dec 2015
Location: Wellington, Florida
Posts: 1,638
If it happens again, try a Micro-Air EasyTouch RV™ Thermostat unit specific for your coach.

I have one a does a nice job for Heat Pump, Oasis Heat, AC units, etc.
Ted & Nancy
2015 Newmar Dutch Star 4018
2020 Jeep Wrangler Rubicon
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Old 03-07-2022, 05:11 PM   #6
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Join Date: Feb 2019
Location: Richland WA
Posts: 6
Question Question on Mode Features for Dometic

VLE 2019/3709

My question is when in the AUTO mode will the thermostat start the gas furnace? I am guessing it does not so I have been using the HEAT mode.

When I put the MODE in Heat the furnace runs but we also get cold air from the HVAC ceiling fixtures. How do I stop cold air coming into unit when in furnace mode.

What says the wisdom of the group?
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dometic, thermostat

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