The central heating system is working okay. However, the hot water from the shower is fluctuating from hot to cold every 20/30 seconds or so as is the hot water running to the bath. Any suggestions ?

Wally Haines, January 2008

Since my boiler has been fitted it continually rises above the srecomended pressure level and water is permanently dripping through the outflow pipe into garden. Has anyone an idea to solve this. I have it regularly serviced. Im atold they repaired it but it alwys starts again-after they fit a clock and get payment!!

Bobby, November 2010

My boiler is a combination boiler and despite nearly all sensors, thermostats and boards being replaced, the hot water is scalding although the temperature is on as low as can be and yet the heating is only tepid when turned up, could it be the exchange unit, any ideas would be gratefully recieved

Tony Davis, February 2010

boiler will not fire up tried reset red lamp alight gas ok

E M, December 2009

I have dhw but no central heating. Even when using the override button the boiler does not fireup an work. I have had some success with the central heating when I moved the wires inside the flap which houses the clock etc bit this intermittent.

Ross jones, November 2009

Did this procedure work? If not, what did? I have the same problem.

Bill, June 2008

It's proberbly the venturi in the fan. Try changing the fan venturi and use the long white version not the short red one.
Also for what it's worth change the hot water and heating thermistors. Change both because they work off each other so one faulty one can throw out the other. In total all 3 will only cost around £20 and all are easy to change but byou will have to drain the boiler for the sensors.

Andy, January 2008