Replace the flame sensor

1. Use an M5 hex wrench to loosen the screws securing the control box and remove the control box.

2. Use an M2 hex wrench to loosen the screws on the back panel of the control box and open the control box.

3. Disconnect or unscrew the cables on the mainboard.

4. Use an M2.5 hex wrench to loosen the screws on the motion sensor and flame sensor (for Ray5 40W, only the flame sensor needs to be replaced). Remove the old sensor and replace it with the new one. Use the M2.5 hex wrench to secure the screws, then reconnect the original cables.

5. Close the control box, tighten the back panel screws with an M2 hex wrench, and reinstall the control box onto the machine.

Replacement complete.