RV thermostat display shows LO, HI, or sensor code
Use this when a thermostat display is outside its temperature range, not matching room conditions, or showing an indoor, outdoor, or freeze-sensor code.
Owner-safe checklist
- Record room conditions.
- Capture thermostat model.
- Avoid changing wiring or internal settings.
Official sources
- Coleman-Mach Digital Thermostats 9420-381 & 9420-382
- Dometic Single Zone LCD Thermostat Operating Instructions
- Dometic 3316420.XXX Bluetooth CT Thermostat Operating Instructions