When the CH is on after about an hour the boiler starts to make a vibrating noise and the boiler displays the error message S06 or 506 (not in the booklet). The noise doesn't cease until the boiler is switched off or the CH temperature adjustment knob is turned down - the problem reoccurs if the temperature knob is turned down. Boiler is 18mths old but the warranty has lapsed. Engineer has been called out twice and he has cleaned the boiler electrodes and replaced the ignition switch, to no avail. The vibrating noise can also be heard when the hot tap is running and the water is heating up - the noise however stops after about 5 seconds.
Have bled the radiators and the pressure gauge goes up to 2bars when the CH is on.
Any ideas before I call the engineer out again?
Have bled the radiators and the pressure gauge goes up to 2bars when the CH is on.
Any ideas before I call the engineer out again?