Recent content by bocsta

With 50% on boiler stat, I still have the same short runs except less intensity. Opening the HV valve seems to extend the run cycle by a small amount but not to the point where it stays on until UFH stats call it off. So how can I correct this (apart from new boiler lol) ? Is it caused...

Yep I've read all the bad about the k25 but you get what you given when you buy a new place! Thermostat is set to 3/4 on the boiler. Doesnt make much diff where I have it but what the hell makes it a different animal when the UFH is calling it compared to the HW ? I replaced both actuators...

I have a Keston C25 supplying a cylinder & underfloor heating. Both cylinder and UFH are wired together to SL on the boiler. My cylinder thermo will call boiler and it comes and stays on until temp reached when thermo cuts live via Drayton ZA5 However my UFH will supply live to the SL...

New ZA5 on ...all good old microswitch is a sealed unit so without meter cant tell if it was the culprit

picked up a new ZA5 actuator today...will be going on tomorrow/Sat and th old one going under the knife!

Keston Celsius 25 I think it must be the microswitch as the actuator lever is in the off position yet the boiler is still being called The valve doesnt look to be sticking as its moveable by hand so its staying closed But is this common with the ZA5 actuators ? Couldnt see much of...

I thought my Heating was causing my boiler to fly for short spurts of 5 secs but today after disconnecting the live feed from my Underfloor heating to the boiler, I discovered that the boiler was still firing in short spurts with only the HW wiring connected. But the HW control was set to...