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