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Thanks for your further advice Ian. It is good to know that most people are using water-based floor varnishes and recoating when necessary without any problems! Mike

Thanks for your ideas woodfinishes 1877. We cleaned the floors thoroughly but didn't sand them - no trouble with doing this with solvent-based varnishes in the past! We are thinking of sanding back to the wood as you suggest. If we do, should we use a water-based varnish, even though we...

We varnished our kitchen and bathroom floors twenty years ago and recoated them with solvent-based varnish every five years or so since. We never had any problems until now! Last year we couldn't find any solvent-based floor varnish, so we recoated with a water-based one instead. Now we...

Thanks for your ideas so far. I wasn't trying to 'keep my cards close to my chest'! The room stat is set at 20c. The boiler is a greenstar RI and its temperature is difficult to tell because there are no calibrations. My pipe thermometer says it goes up to about 70c. It is definitely...

It's about 9 minutes between on and on. My boiler turns on for about 4 minutes followed by off for about 5 minutes. I have a Danfoss room stat in the hall and this is what is controlling these time periods. What I really want to know is are they normal? Do other people's systems turn on...

After my central heating settles down it cycles on and off and on again every 9 minutes or so. Is this normal or is it much too frequent? Will it shorten the life of my boiler?

I agree with you ChrisR (in an ideal world) boilers should not go above the set temperature and if they do it should count as a fault. However the designers of the Greenstar Ri seem to think otherwise. The flowchart in the manual shows nothing about the boiler shutting down if the set...

Well you have convinced me that my boiler behaves properly according to its design. Thanks for that as it has saved me being tempted to buy a new PCB! But could the design have been better? After all, in certain circumstances my boiler takes about 15 minutes to cool down after a DHW cycle...

Thanks for your replies so far. The pump is wired from the boiler properly to give pump over-run. So the pump over-runs every time the demand stops, except when the over-temperature shut-down occurs. This is correct according to the manual. I have a mid-position valve. The idea that...

My Greenstar Ri boiler works well generally but it behaves oddly in two ways. When it is just heating the DHW it goes into over-temperature shut-down when the demand stops. This is okay because the boiler cannot modulate low enough so the water is almost bound to go over-temperature...