Uploaded September 2022 | Updated September 2026, 1 week ago

---

W1209 Thermostat settings and parameters for heating purpose

Long press the “SET” button to activate the menu

Code - Description - Setting Range
P0 Heating/Cooling Mode H/C
P1 Hysteresis (Return difference) Degrees 0.1C to 40C
P2 Set Upper Temperature Limit (Degrees) -50C to 110C
P3 Set Lower Temperature Limit (Degrees) -50C to 110C
P4 Temperature Offset Correction (Calibration) Degrees -15C to +15C
P5 Trigger Delay Start (Minutes) 0-10 Minutes
P6/P7 High Temperature Alarm (Degrees) -50C to +110C
P8 Factory Reset (Can also press + and – for 5 seconds)