TG / TH DGH FC1, FC2, FC3 P-100 (3 star) P-55 (4/5 star) pressure switch related faults
FC1: P-100 (3 star) or P-55 (4/5 star) closed at start
FC2: P-100 (3 star) or P-55 (4/5 star) failed to close
FC3: P-100 (3 star) or P-55 (4/5 star) open during run
Click here to view YouTube video Spectrolink SCC accessing and clearing fault code history
For ALL FC2 pressure switch failed to close and FC3 pressure switch opened during run faults always check the integrity of the combustion fan pressure hose spigot (pressure tapping)
Remove and check that there is no partial blockages on the other side of the spigot (pressure tapping) caused by by products of combustion
COMBUSTION FAN SUCTION PRESSURE - CORRECT METHOD OF TESTING FOR ACCURATE READINGS DURING NORMAL HEATER OPERATION
