afs light

Hello, Thanks in advance for the help and comments. I have a Pentair 400 Mastertemp and I am currently getting a AFS error. I have checked the other threads on here regarding this issue and haven't pinpointed the issue that I am having. - I have checked the airflow sensor and that seems to be...

I have a Pentair Mastertemp 400 with an AFS light on. The heater turns on and runs for 10 seconds and turns off and throws the light on. Before this light came on I replaced the pressure switch, high limit switch, thermistor, manifold bypass valve, and control board due to an issue caused by the...