Good Sam Club Open Roads Forum: Digital Thermostat Cuts on AC During Freezing Weather


Open Roads Forum	Already a member? Login here. If not, Register Today! \| Help

Newest | Active | Popular | RVing FAQ

Forum Rules | Forum Posting Help and Support | Contact

Open Roads Forum > Travel Trailers > General Q&A

Reply to Topic | Subscribe | Print Topic | Post New Topic |

bstar1952

Bandera, Texas

Full Member

Joined: 08/15/2007

View Profile

Good Sam RV Club Member

Offline

Posted: 02/28/20 09:01am

Link | Quote | Print | Notify Moderator

Wondering if anyone else has seen this issue. Last night, we had a deep freeze down here in South Texas. The freeze caused our electric service to *blink*. This happened about 5:00 am. When letting the dogs out an hour later, I heard my TT's AC unit running. I have an RV port and the TT was winterized but I keep it plugged in. Only way, that I can figure, for the AC to come on all by itself, is a glitch with the Dometic digital thermostat during electrical fluxes. Since we don't experience many freeze nights, hard to replicate. Anyone else had this happen?
On a side note, I was wondering if this harmed my AC unit, can't be good to have an AC running in 27 degree weather? (Not for sure if the compressor was running or just the fan.) As I don't really like the digital therm anyway,I'm considering replacing it with an old style analog one. If anyone has done this, easy job? Cheers........

Bstar1952
Bandera, Texas
2020 Ram 2500,6.4 Hemi
2019 (East to West) Della Terra 29KRK
Fastway E2 WHD Hitch

ScottG

Bothell Wa.

Senior Member

Joined: 02/25/2005

View Profile

Offline

Posted: 02/28/20 10:03am

Link | Quote | Print | Notify Moderator

Could it being turning on a heat pump or the optional electric heat function?

Scott, Grace and Wesly
2003 Dodge 3500 4x4, 6 speed Cummins.
2018 Silver Fox 32A.
H0NDA eu2000i

DarkSkySeeker

Freestone, California

Senior Member

Joined: 10/13/2016

View Profile

Offline

Posted: 02/28/20 10:41am

Link | Quote | Print | Notify Moderator

This is a longshot, but mine used to come on with the heater because the "differential" temperature was set to 1. The AC and heat would both come on. To "fix" it I had to set the differential to 3. This involved pressing the on button and up arrow at the same time (or something like that - sorry for the vagueness).

There is something special about camping in an RV.
.

cavie

Port Charlotte Fl/ Hindsdale MA

Senior Member

Joined: 04/28/2019

View Profile

Offline

Posted: 02/28/20 01:58pm

Link | Quote | Print | Notify Moderator

you are the very first person in 4 years that I have heard wanting to go Digital to Analog. Care to elaborate?

2011 Keystone Sprinter 323BHS. Retired Master Electrician. Retired Building Inspector.

All Motor Homes are RV's. All RV's are not Motor Homes.

bstar1952

Bandera, Texas

Full Member

Joined: 08/15/2007

View Profile

Good Sam RV Club Member

Offline

Posted: 02/28/20 04:00pm

Link | Quote | Print | Notify Moderator

Thanks everyone for the tips.
Cavie: I want to change to an analog thermostat because the digital one is too sensitive. It's mounted in my hallway and every time we walk by we'll somehow change something, Probably just brushing it with our clothes or something. Its gotten to be a major PITA for us. However, since my original post, I've ordered one of those clear plastic thermostat covers and once installed, might just solve our problem.

dodge guy

Bartlett IL

Senior Member

Joined: 03/23/2004

View Profile

Offline

Posted: 02/28/20 05:00pm

Link | Quote | Print | Notify Moderator

Do you have a auto T-stat. Maybe it got to it’s set warm temp and the ac kicked on to being the temp back down. Just a thought!

Wife Kim
Son Brandon 17yrs
Daughter Marissa 16yrs
Dog Bailey

12 Forest River Georgetown 350TS Hellwig sway bars, BlueOx TrueCenter stabilizer

13 Ford Explorer Roadmaster Stowmaster 5000, VIP Tow>
A bad day camping is
better than a good day at work!

starlord

Wichita Falls, Texas

Full Member

Joined: 09/06/2006

View Profile

Offline

Posted: 02/28/20 06:19pm

Link | Quote | Print | Notify Moderator

I agree with Dodge Guy. When I first got my present TT I set the thermostat to AUTO instead of simply Hot or Cold. When the heater came on, it would heat enough to turn on the air conditioner. Not talking about the auto setting for the fan, just the temp setting.

cavie

Port Charlotte Fl/ Hindsdale MA

Senior Member

Joined: 04/28/2019

View Profile

Offline

Posted: 02/29/20 04:33am

Link | Quote | Print | Notify Moderator

bstar1952 wrote:

Do you have straight cool or heat pump systems?

Chris Bryant

Arden, North Carolina

Senior Member

Joined: 03/26/2003

View Profile

Posted: 02/29/20 07:46am

Link | Quote | Print | Notify Moderator

If the fan is set to high or low, the air conditioner blower will come on with the furnace to circulate the air. Set the fan to auto to keep this from happening.
The hard part about replacing with analog is running thermostat wires.

-- Chris Bryant