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feroli optimax fault code a4 ?

could this be flue temp sensor

phil b, January 2016

home Fix label Heating label_important Home Heating Systemsdone

http://www.mrboilerrepairs.co.uk/fault-codes-Ferroli-Optimax-HEplus-31C

http://www.plumbheat.info/repairs-common-faults-info-for-ferroli-boilers/

http://www.justanswer.co.uk/hvac/8z6u2-ferroli-optimax-31c-he-recently-new-fan.html

XXX, January 2016

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home Fix label Heating label_important Home Heating Systems

feroli optimax fault code a4 ?

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feroli optimax fault code a4 ?

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feroli optimax fault code a4 ?

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