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XH-W1219 DC 12V Dual Display Digital Thermostat

K-TECHNICS
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KSh650.00

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The W1219 (or XH-W1219) is a highly precise, low-cost dual-display digital thermostat module designed to automate heating or cooling systems. It uses an NTC 10K waterproof sensor probe to monitor temperatures between -50°C and 110°C. 
Technical Specifications
  • Operating Voltage: DC 12V
  • Output Type: 1-channel relay switch (Rating: up to 10A at 12VDC / 120VAC)
  • Control Accuracy: 0.1°C
  • Display Layout: Top screen (usually Red) shows current temperature; Bottom screen (usually Green) shows target trigger temperature.
Wiring Guide
The board features two distinct terminal blocks:
  1. Power In (+12V and GND): Connect a stable 12V DC power source to power the board itself.
  2. Relay Switch (K0 and K1): These function as a simple inline light switch. They do not output voltage. You must run one line of your external appliance's power supply through these terminals to let the board break or complete the circuit. 
How to Program the W1219
1. Setting the Target Temperature
  • Press the SET button briefly. The bottom display will flash.
  • Use the + or - buttons to reach your desired target temperature.
  • Press SET again or wait 5 seconds to save and exit. 
2. Advanced Parameter Settings (P0 – P8)
Press and hold the SET button for 3 seconds to access the configuration menu. Use + / - to navigate between parameters, and press SET to adjust them. 
Parameter  Function Settings Range Default
P0 Cooling / Heating Mode C (Cooling) / H (Heating) C
P1 Hysteresis (Backlash) 0.1°C – 15°C 2°C
P2 Highest Temp Limit -49°C to 110°C 110°C
P3 Lowest Temp Limit -50°C to 109°C -50°C
P4 Temperature Calibration -7.0°C to 7.0°C 0.0°C
P5 Delay Start Time 0 – 10 minutes 0
P6 High-Temperature Alarm -49°C to 110°C (or OFF) OFF
P7 Data Lock ON / OFF OFF
P8 Factory Reset ON / OFF OFF
  • Hysteresis (P1) Example: If you set your thermostat to Heating mode (H) at 35°C with a hysteresis of 2°C, the relay turns off at 35°C and turns back on when the temperature drops to 33°C (35 - 2). 
Error Codes
  • LLL: The NTC temperature sensor is disconnected or broken.
  • HHH: Temperature is out of the measurable range (the relay will force-shut off).
  • ---: High-temperature alarm has been triggered. 
Resetting to Factory Settings
If the settings get corrupted, press and hold both the + and - buttons simultaneously for 3 seconds while powered on. The display will reset to default configurations

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