Recent content by perfectplanet

Just a quick note to say.... Fixed! I tested the frost stat with a multimeter and it was fine. So I tested the zone valves and turned out the microswitch inside the CH zone valve had stuck on. I replaced the actuator with a new one. Wired it back up carefully and all works great! It's been...

Hi all A quick update. I've had both CH and HW actuators off their valves and I've tested that they both do turn on and off properly as the CH/HW/cylinder stats and programmer all require. So I'm satisfied that both valves turn freely and that the motors in both actuators are working...

Hi Dan I removed the motorhead and the screwdriver-like head underneath (is this the spindle?) is perpendicular to direction of flow. I can turn it fairly easily with my fingers. Pic: Both CH and HW values are Sunvic SZ 2301 units. There's a flushing lever on each one: when I move the...

Ok I've just realised I can flip the case of the Honeywell frost stat off to reveal the stat dial. It's set fairly low (5 deg C). Setting it lower doesn't stop the pump or stop the boiler. It clicks at about 17 deg C which is about the right temperature in the garage at the moment. It looks...

Thanks lightning, I dont have a multimeter, but if I did get one, is this easy to test (I'm confident DIYer but novice with CH and electrics)?

Hi Tony, thanks for your reply - is there anything I can easily do to check if it's faulty? I'll admit to trying pointing a hairdryer at it for a short time, to artifically warm it up but had no effect...

Hi there I'd really appreciate any advice regarding this problem, before I call an engineer out. We moved into a new house last year. CH and HW all seemed to work fine. However the pump is on 24/7 - even when the room thermostat and programmer are all off. Initially the problem was...