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Mend Chaffoteaux Maury minima mx 30 ff Boiler Stops Heating

can i make ajusments to my boiler,just had a new pcb fitted and cannot get?

the boiler starts and stops, showing "thermister heating open" on the diagnostic code lights, it is a Chaffoteaux Maury minima mx 30 ff

Gordon Wale
February 2011
Chaffoteaux MauryChaffoteaux Maury minima mx 30 ffHeating, Home Heating SystemsBoiler Stops Heating

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Chaffoteaux Maury Minima MX 30 FF Boiler Help