valve actuator

We have a heating issue where the boiler is staying on and heating downstairs. It's a 3 zone system, upstairs, downstairs and hot water. The upstairs and water are functioning as normal, only coming on when set to on at timer. Downstairs remains on with timer turned to off its a horstmann 3zone...

Hey folks, I’m in the Uk and looking to replace my Danfoss TP4700 with a new thermostat (still searching the similar model with less hassle to replace), the 6 actuators are broken so need to be replaced. The actuators are Giacomini R473 230V 2 wire normally closed actuators, it is difficult to...

We have an old Potterton Suprima 100L system boiler. Having just had our PCB replaced (can anyone give me a rough cost for that? I feel we've been overcharged!), our CH is running all the time. We're left having to switch it on & off at mains. Second opinion from another engineer feels it is...

Hi chaps Opinions please. I'm fed up of having to replace the head on the diverter valve on my heating system (Myson ACT322) every couple of years now. It gets stuck at various positions and causes really hot water in the hot tank or failure of the rads to warm up. A jiggle of the manual lever...