Dometic Single Zone LCD Thermostat and Control Board Kit, White

The Dometic Single Zone LCD Thermostat and Control Board Kit is the brains behind your RV's climate system. Part number 3316230.700, it runs your air conditioner and your furnace off one clean, low-profile wall control with a big LCD you can actually read at a glance. If you've been living with an old analog dial that you have to squint at and guess where to set, this is the upgrade that makes the whole system feel modern.

Here's what you're getting. It's a single-zone kit, so it controls one climate zone in your rig, cooling and heat together. The wall head is a polar white capacitive touch case that wipes clean and looks at home on just about any interior. And it ships with the control board, which is the part that lives up at the unit and does the actual switching. That matters. A lot of thermostat listings sell you just the wall head and leave you hunting for the board separately. This kit has both, so you're wiring in a complete control system, not half of one.

Power is straight 12 volt DC, the same house-battery voltage your RV already runs, so there's no separate transformer or adapter to source. The display is a large LCD that shows your set temperature and mode clearly, day or night. It's programmable too, so you can set it and let it hold a comfortable cabin while you're out hiking or sleeping, instead of riding the dial by hand every few hours.

Fan control is where this one earns its keep. You get low, high, and auto fan speed, plus an auto/on mode switch. Run auto and the fan cycles with the cooling or heating call. Flip it to on and the fan runs continuously to keep air moving and even out hot and cold spots in a long trailer or motorhome. On a muggy afternoon at a campground with the AC working hard, that continuous circulation makes a real difference in how even the cabin feels. And on a cold morning boondocking somewhere quiet, the same fan control helps the furnace push warm air the length of the coach instead of stacking it all near the vent.

Who's this for? Anybody replacing a tired analog Dometic thermostat, or anyone whose LCD control finally quit and needs a like-for-like fix. The cool/furnace design means it's built for RVs and campers that run a Dometic rooftop air conditioner and a forced-air furnace off one control. It's a single-zone kit, so if your coach has two separate zones front and back, you'll want a control per zone. No shame in it, it's just how single-zone works, and most trailers and smaller motorhomes are single-zone rigs anyway.

Install is a straightforward swap for most owners. The wall head mounts where your old thermostat was, and the control board goes at the air conditioner. Keep your low-voltage runs sensible and your connections tight and you'll have clean, predictable operation. If you're comfortable pulling a thermostat off the wall and matching up labeled low-voltage leads, you can handle this. If you're not, any RV tech will knock it out fast, and it's the kind of job most shops can turn around same day.

A few honest notes. This is a functional climate control, not a smart-home gadget, so don't expect phone apps or WiFi. What it does do, it does reliably. Clear readout, programmable comfort, real fan control, and one board-plus-head kit that gets your cooling and heat back under one roof. It carries a Dometic limited one-year warranty, and we back it as an authorized Dometic dealer. If you've got a Dometic system and you want the control side done right, this is the kit.