fan running no ignition?
should my central heating pump run all the time ?
dhw continues to run even though the taps are off?
no hot water and pressure valve is on red and water is leakiing outside?
hot water?
what does F14 mean and F5?
max of 50 degrees hot water?
presure goes up ?
were do I get a diagram and information on airpressureswitch 105he?