While you wait for answers, we may have found some information which could help you.
Success
Message
pressure switch?
burner going of after 2 or 3 minutes and on?
max of 50 degrees hot water?
gas neoon flashing?
water goes cold during shower?
water sensor?
no hot water and pressure valve is on red and water is leakiing outside?
what does F14 mean and F5?
charging system up?
no domestic hot water?
Fan light flashing?
were do I get a diagram and information on airpressureswitch 105he?