Before You Start
What You Need
- A Phillips or flathead screwdriver
- Your WalTech Vision 2.0 installation package (everything is included)
Estimated Time
About 30 minutes for most installations. If you're replacing a standard thermostat, the whole process is straightforward: remove the old unit, connect the wires, and mount the WalTech.
How HVAC Systems Work
A thermostat is the control panel for your HVAC system. It sends signals to the HVAC controller (the brain inside your rooftop unit or furnace), telling it what to turn on and off.
What the Controller Connects To
The HVAC controller manages all of the climate hardware in your RV:
- AC / Compressor Cools the air. Can be single-stage or two-stage.
- Fan System Circulates air through the ducts. Multiple speed options on most units.
- Heating Units Furnace, heat pump, or heat strip, depending on your setup.
Types of Wiring Connections
Different brands use different methods to communicate between the thermostat and controller. Here are the four types you'll encounter:
Direct Wire (Relay-Based)
Each wire controls a specific function (fan low, fan high, cool, heat, etc.). The thermostat acts as a set of switches.
Used by: Coleman Mach & Airxcel single-zone, most home thermostats
Single Communication Wire
Power, ground, and one data wire. The thermostat and controller exchange digital signals over that single wire.
Used by: Dometic & GE single-zone
Dual Communication Wires (RS-485)
Two data wires (A and B) carry balanced signals. This allows communication over longer runs with less interference, which is ideal for multi-zone setups.
Used by: Furrion single and multi-zone
Direct + Communication
A combination of relay wires for basic functions plus a signal wire for advanced features. Used in multi-zone setups where zones need to coordinate.
Used by: Coleman Mach / Airxcel multi-zone
Single Zone vs Multi-Zone
Single Zone
One thermostat controls one HVAC controller. This is the most common setup in RVs. One rooftop unit, one thermostat, one set of wires.
Multi-Zone
Up to 4 zones, each with its own HVAC controller, all interconnected. Larger RVs and fifth wheels often have 2 or 3 zones for separate climate control in the bedroom, living area, and basement.
What's in the Box
Your WalTech installation package includes everything you need for mounting and wiring. No extra trips to the hardware store.
Jumper Wire (black)
For relay or other connections depending on your wiring type.
Screws
For mounting the thermostat base plate to the wall.
Wall Anchors
For drywall and other surfaces that need extra support.
Orange Wire Nuts
For secure wire connections when splicing or extending wires.
Tightening Screw
Locks the thermostat to the base plate. Keeps it secure on rough roads.
Mounting Template
Paper template showing drill holes and wiring cutout positions.
QR Code Sticker
Stick it near the unit. Links directly to installation instructions.
WalTech Connection Points
The back of the WalTech Vision 2.0 has three connection areas. Which ones you use depends on your wiring type.
| Location | Connector | Details |
|---|---|---|
| Left Side | 8-pin connector | Primary wiring connector used by most installations. |
| Right Side | 8-pin connector | Secondary connector for additional wiring needs. |
| Middle | RJ11 port | Used for Dometic multi-zone (CCC) installations only. |
Push-and-Lock System
The 8-pin connectors use a push-and-lock mechanism. No crimping, no soldering, no special tools required.
- 1 To insert a wire: Strip about 1/4 inch of insulation, then push the bare wire firmly into the pin slot until it clicks.
- 2 To release a wire: Press the small white button next to the pin slot while pulling the wire out.
Choose Your Wiring Guide
Select the guide that matches your current thermostat or HVAC system. Each guide has step-by-step wiring instructions with diagrams.
Coleman Mach / Airxcel
Single-zone direct relay wiring. The most common RV thermostat replacement.
View guide →Coleman Mach 9 Series
Multi-zone (RV Comfort ZC). 9-pin + 2-pin connector with signal wires.
View guide →Coleman Mach 8 Series
Multi-zone (RV Comfort ZC). Direct relay + signal based wiring.
View guide →Coleman Mach Two Stage
Dual AC compressor systems. 9-pin + 3-pin connector wiring.
View guide →Dometic & GE (3-Wire)
Single-zone signal-based wiring. Power + ground + communication wire.
View guide →Dometic CCC Multi-Zone
10/12 button and old 5-button models. Simple RJ11 plug connection.
View guide →Furrion
Single and multi-zone. RS-485 dual communication wire system.
View guide →Home / Commercial 24V
Standard 24V residential and commercial HVAC systems.
View guide →