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    Central heating refill... panic!

    I decided to drain my CH system and fill the header tank with F5 in the hope of clearing some of the crap that would have built up over the years on an old, neglected system. I followed the instructions from this site for the drain down. Opened all rad valves Shut off the supply to the...
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    Replacing Potterton controller with Honywell ST9400C

    Hi all, I am updating me CH / HW controller from a Potterton EP2000 to the Honeywell ST9400C, but am having issues working out the wiring... The Potterton has 7 connections (plus the earth) and the Honeywell has 6 (plus the earth). This image shows the wiring guide for the...
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    Honeywell DT90E stat with an oil boiler

    Hi all, I have recently replaced my old Honeywell room stat with the digital Honeywell DT90E to control my oil boiler. On the plus side, i have now realised that my old stat was very inacurate... on the negative side, I get the feeling I will end up using much more oil with the new stat...
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