Gently grip the outer frame of the thermostat and pull it away from the wall mounting plate.

: Displays the current time or a timed program schedule.

| Symptom | Likely Cause | Solution | |---------|--------------|----------| | Display blank | Dead batteries or no power | Replace batteries; check mains breaker (if hardwired) | | Room too hot / cold | Incorrect target temp or schedule | Check setpoint; disable Auto mode temporarily | | Heating never comes on | Mode set to Off or Eco below room temp | Switch to Comfort or Auto | | Heating stays on constantly | Relay stuck or wrong differential setting | Power cycle; call technician if persists | | Display shows wrong temperature | Unit in direct sun or near heat source | Relocate or recalibrate (see advanced settings) | | "Err" or "E1" on screen | Sensor fault | Contact Intronics support or HVAC pro |

To maximize efficiency and lower bills:

If your thermostat is behaving erratically or you have moved into a new home with a confusing schedule, reset it to default.

: Maintains one constant temperature continuously. Program Mode : Follows your customized daily time schedules.

Press repeatedly to cycle:

Ensure the thermostat is not mounted near direct sunlight, drafty windows, drafty hallways, or heat-producing appliances. Dust the interior of the thermostat base plate gently with a soft brush. 5. Energy-Saving Tips for Your Intronics Thermostat

Use the ▽ button to scroll through the available programs and parameters. A typical PI series has 10 programs (e.g., Program 1: Min Temp, Program 2: Max Temp, etc.).