Heating / Hot Water not working - temp display giving what appears to be random numbers from 20 upto 99 and back down. When hot water is run it remains cold, again the display temp appears random and eventually error code A 03 appears (boiler temp exceeded max temp)

The boiler does not feel hot and the above happens soon after I press reset button.

Could this be a faulty thermostat? and is this easy and cheap for me to replace myself.

Peter, April 2010

is the pump running they have a problem wher the impeller sheers off you will need to remove pump head to check it

parry gasman, April 2010