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thermostat on direct cylinder wont go any higher after changing pump

Postby james_baillie » Sat May 28, 2016 3:15 pm

hi guys probably normal but i changed my heating pump and unions. then i had a problem with boiler micron 30 ff. i had to change the PCB. have also ballanced rads . now i noticed the cylinder thermostat was set over 60. so pump wouldnt switch off as it could never get to temp. i turned it down to 50 same as next door with same setup and all is fine

my question is why cant ut go any higher then 50. im sure it used to past 50. i didnt notice old pump staying on . if it was it was quiet.

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