The easiest WalTech upgrade. Just unplug your old thermostat's RJ11 cable and plug it into the WalTech - no wiring required.
This guide covers both the 10/12 button and the old 5-button Dometic CCC (Comfort Control Center) multi-zone thermostats. Both models connect using a standard RJ11 telephone-style cable - no individual wire connections needed.
The Dometic CCC is the simplest thermostat to replace with a WalTech Vision 2.0. You literally unplug one cable and plug it into the WalTech. The entire process takes about 15 minutes including mounting.
Locate the RJ11 telephone-style cable connected to the back of your old Dometic CCC thermostat. Press the release tab and pull the cable out gently. This cable connects your thermostat to the Dometic control board.
The cable looks exactly like a standard telephone cord with a clear plastic plug on the end. Do not cut or modify this cable - you will plug it directly into the WalTech.
Use the included mounting template to mark your screw holes. The WalTech Vision 2.0 mounting plate may use different screw positions than your old Dometic CCC, so you may need to drill new holes.
Secure the mounting plate to the wall and route the RJ11 cable through the opening.
Plug the RJ11 cable into the middle port on the back of the WalTech Vision 2.0. This is the RJ11 Telephone jack port. You will hear a click when it is fully seated.
Turn on your RV HVAC system power. The WalTech Vision 2.0 should boot up and display the setup wizard within a few seconds. Since power comes through the RJ11 cable, the thermostat will power on as soon as the HVAC system has power.
The setup wizard will ask you to select your thermostat type. Choose the option that matches your Dometic CCC model:
Select "Dometic CCC-10/12 Btn Multi Zone" from the system list. Follow the on-screen prompts to configure your heat staging based on what equipment you have (heat pump, furnace, heat strip, etc.).
Select "Dometic - 5 Btn Multi Zone" from the system list. The 5-button model requires specific mandatory heat staging settings:
| Stage | Setting | Required |
|---|---|---|
| Stage 1 | Heat Pump | Mandatory |
| Stage 2 | Heat Strip | Mandatory |
| Stage 3 | Furnace | Mandatory |
Old 5-button Dometic CCC systems typically do not send room temperature data back through the RJ11 cable. This means the WalTech cannot display actual temperature readings for other zones. The system still works and controls all zones correctly - you just will not see live temperature readings from each zone on the WalTech display.
Zone 1 (where the WalTech is installed) will always show accurate temperature since it uses the WalTech's built-in temperature sensor.
On 5-button systems, the Zone 1 thermistor in the old thermostat is no longer in use after replacing with the WalTech. The WalTech uses its own internal temperature sensor for Zone 1 readings. If you notice a slight temperature difference compared to your old thermostat, this is normal - the WalTech sensor may be in a slightly different position on the wall.
| Code | Meaning | What to Check |
|---|---|---|
| E1 | Communication Loss | Check RJ11 cable connection. Unplug and replug firmly. |
| E2 | Freeze sensor temp out of order | Evaporator freeze sensor may be disconnected. |
| E3 | Outdoor sensor temp out of order | Outdoor temperature sensor may be faulty. |
| E4 | Indoor sensor temp out of order | Indoor temperature sensor on the control board. |
| E5 | High pressure fault | AC system high pressure switch triggered. May need HVAC service. |
| E6 | Low voltage detected | Check your RV battery voltage and shore power connection. |
| Code | Meaning | What to Check |
|---|---|---|
| E1 | Communication Loss | Check RJ11 cable connection. Unplug and replug firmly. |
| E2 | Freeze sensor temp out of order | Evaporator freeze sensor may be disconnected. |
| E3 | Indoor sensor temp out of order | Indoor temperature sensor on the control board. |
| E4 | Low voltage detected | Check your RV battery voltage and shore power connection. |
No. The Dometic CCC uses an RJ11 telephone-style cable. Just unplug it from your old thermostat and plug it into the middle port on the WalTech Vision 2.0. No wire stripping, no pin connections, no jumpers.
Both use the same RJ11 connection, but they require different settings in the WalTech setup wizard. The 5-button model also has mandatory heat staging settings that must be followed exactly (Stage 1: Heat Pump, Stage 2: Heat Strip, Stage 3: Furnace) regardless of your actual equipment.
Old 5-button Dometic CCC systems typically do not send room temperature data back through the RJ11 cable. The WalTech controls all zones correctly, but it cannot display live temperature readings from zones other than Zone 1.
Single-zone signal-based wiring with power, ground, and communication wire.
Single and multi-zone RS-485 communication wire system.
Complete error code reference for all supported systems.
See which Dometic models the WalTech Vision 2.0 replaces.
Our support team is here to help. Text us a photo of your thermostat and we'll confirm compatibility and walk you through installation.