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Hi, noted. Can I simply remove and inspect the sensor without draining the system, do I have to power down etc, any advice appreciated. Thanks.

Hi Thanks for the prompt reply. The system was power flushed prior to installing the boiler at the time, could it be a hard water issue? The water coming out of the rads is crytal clear and you can smell the inhibitor, so not entirely convinced that it is dirt build up? It is currently...

Hi I have been experiecing the F.75 issue from a few months after the installation and a little top up resolved the problem, it has been over two years now and the problem has probably occurred less than ten times. Reason why i am here is because i was going to set the timer and noticed the...