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This particular unit has been serviced by a RGI Pro, overheat lock out still occurs very very occasionally, I have now turned the boiler thermostat down to about 11 o'clock (from 12 o'clock) -since when it has not failed, I now think it may have been simply running too hot, -what do you guys...

I have a leak from the black flow switch when the boiler has cooled down, it amounts to more than a jam jar of water over night & is yet another example of poor Baxi engineering,,, access to change the switch is not simple due to tight fit of surrounding parts, & system drain down etc. Any...

Agile, powell30, thanks for your comments & spelling lesson -it was a typo really! Of course I also totally agree most of this work must be carried out by a RGI, -certainly where the majority of clients are concerned. (I received training in the past & have also watched the Homeserve & other...

My Baxi 100/2 HE PLUS - is 4 1/2 years old, it replaced a 4 year old Baxi Barcelona condensing boiler which was so unreliable that Baxi agreed to provide a new unit at a special very low cost. Now this 100/2HE has started locking out on overheat i.e. the red light flashes. When I press reset...

It may be the flame failure probe or the ignition spark unit not working correctly, easy to replace & worth a try. However I find a gentle wire brushing of these three items keeps them working between each service as they are in the flame & become covered in a white deposit, watch the spark gap...