Digital thermostat eating batteries

meatbag · 06-11-2018, 11:45 AM

I replaced my factory analog thermostat with a supco/CTC/hunter 43054 digital . It works much better but goes through batteries about every 36 hours.

2017 Rockwood roo 17 , thermostat for heat only.

I read something about how there is no constant 24v AC and that is why it runs entirely on battery.

Not thinking I should hard wire 24v so does anyone have suggestions on how to extend battery life , or a different digital thermostat unit which has longer battery life?

Thanks!

**Bama Rambler** · 06-11-2018, 02:41 PM

I haven't read where anybody else has that problem, so I'm thinking that you got a bad unit.

Kaadk · 06-11-2018, 02:45 PM

Is this a thermostat meant for a regular house? House thermostats and trailer thermostats are different. I've never seen a trailer thermostat that needed 24v, or took batteries for that matter.

**Flybob** · 06-11-2018, 03:05 PM

The thermostat you are using is a residential thermostat that is powered by 20-30VAC and uses the batteries as backup. The specs say Current draw is 0.1 to 1.5 amps so no surprise it is killing batteries quickly.

**Bama Rambler** · 06-11-2018, 03:21 PM

That thermostat states that it's compatible with millivolt sytems. Millivolt systems don't supply 24vac for thermostat power, so the thermostat has to run off batteries. That's common to a lot of these home thermostats and the batteries last a long time powering the electronics of the thermostats.

That .1 to 1.5 amps is the allowable current of the switch.

meatbag · 06-11-2018, 04:27 PM

Thanks all. I read somewhere years ago that others had good luck with this unit in their RVs so aside from functioning well, it sucks up battery .

What digital units are you all using which don't require 24v constant , or have better battery life ?

I like this unit because it's simple, reliable, and has indiglo backlight.

MR.M · 06-11-2018, 05:16 PM

Quote:

Originally Posted by meatbag

Thanks all. I read somewhere years ago that others had good luck with this unit in their RVs so aside from functioning well, it sucks up battery .

What digital units are you all using which don't require 24v constant , or have better battery life ?

I like this unit because it's simple, reliable, and has indiglo backlight.

Dometic T-Stat

You may also like: