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I have a Myson oil boiler supplying 8 rads but am getting continually air in the system. A couple of plumbers have checked out the pipework, fittings and design (all OK) and I have also had a new thermostat fitted on the boiler but I still have the problem. Only clue is that air does not seem...

Usual story of air in an open vented system which appears to be being sucked in evry time the system is in operation. Ive tried tightening all compression joints and tied up the ball cock in the tank to prove no water being lost. Could it be sucking in from elsewhere? Anybody any ideas? One...

My boiler has over-ridden and stopped working on a few occassions in the last month. To re-start I take off the front and press the (thermostatic?)overide button and all is fine again. Boiler has just been serviced and is apparently fine but anybody any ideas why it keeps cutting out? Tom