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Tried chemicals, descaling, powerflushing with chemicals, changed pump (and now up to setting 3), checked mot. valves all to try to stop boiler overheating and cutting off when boiler therm. turned above Min. setting (this occurs very quickly before water has fully heated up). Fan looks OK too...

Trad open-vented system 20+ yrs old with Netaheat 16/22. In process of P/Flushing - when flushing any individual rad with others turned off only the bottom line between the therm and lock/s valves warms up if at all but not main body as per instructions. Funny thing is that the rads when used...

Hi Have old Netaheat Mk2F Corgi engineer did service and I discussed fault with him. Boiler over-heating and sometimes cuts out with fan going but no pilot. Chugs along on min boiler temp. setting OK. Some improvement with new pump and cleaning system with chemicals. Blowing down pressure...

Hi I have posted re this problem before and have tried to follow advice. Also searched. Boiler runs OK for a few mins and then shuts off with the front getting too hot to touch (is that normal?). Will keep going (just) on min setting starting and stopping. Higher setting leads to permanent...

Hi There is a black plastic cylinder about 4" tall (with an unscrewable red cap on) stuck on the end of a section of pipe coming from the HW cylinder central heating pipe. It seems to be dribbling a small amount of water. Is this a PRV? If so should it be open or closed (it can be turned) and...

Hi Have tried to just drain down open system after putting in Superfloc. I get good flow from drain with pump on but it diminishes and stops long before even F&E tank empty (ball valve restrained) when pump off. I drained from lowest point on system (a drain point on a cul-de-sac to the...

(Re-submitted from another thread as probably confusing to mix the two problems although they seem similar) Hi I have a problem with Netaheat 16-22 (20+ yrs old). Started shutting down allowing rads to go cold. Heating limps along on minimum setting firing up OK but for short periods only but...

Hi Is there any reason why I can't use a monobloc single lever mixer tap designed for a bathroom basin (ceramic valve, requires 1 bar pressure to work well) in the kitchen? I ordered it and it didn't have a pop-up waste (doh!) so I don't want to use it for the basin. Is there a problem with...