That is strange… Assuming you have the HVAC model, please try the following (you would need a multimeter with AC voltage measure range covering 24V AC):
- Turn HestiaPi off from the Maintenance menu of the App or WebUI and wait for the LCD to go white first and then the LEDs inside the case to stop flashing.
- Turn power off from the circuit breaker so that the LCD is now off
- Pull cover off
- Remove LCD from cover by sliding to the right, rotating anti-clockwise and pulling making sure you are not forcing the plastic hooks too much.
- Pull MicroSD out (to prevent accidental boot)
- Insert LCD by hand on the LCD socket very carefully to align the pins correctly. Please note the male socket on the PCB has some slack. The LCD female header should aligned in the center.
- Restore power from the circuit breaker
- Insert MicroSD and press the reset button on the right side
- Wait for the boot to finish
- Turn fan to ON mode (leave heating OFF)
With the contacts on the HestiaPi’s terminal block referenced like so:
Confirm the following measurements (format Probe 1 Position-Probe 2 Position:Expected AC Voltage in V):
C-R:24
C-G:24
C-W:0
- Confirm the fan turns on.
- Turn heating ON
Confirm the following measurements while the furnace is running:
C-R:24
C-G:24
C-W:24
- Wait for the heating to reach the temperature and confirm
C-R:24
C-G:24
C-W:0
After the test restore normal operation like so:
- Turn HestiaPi off from the Maintenance menu of the App or WebUI and wait for the LCD to go white first and then the LEDs inside the case to stop flashing.
- Turn power off from the circuit breaker so that the LCD is now off
- Remove LCD and re-insert on the cover by following the steps in reverse.
- Restore cover
- Restore power from the circuit breaker
- Wait for the boot to finish
Please report