Parrotman
Active Member
- Joined
- Mar 25, 2007
- Messages
- 144
In need of some inspiration please. Domestic hot water getting way too hot for about a week now.
Have conventional vented fully pumped system. Replaced both hot water cylinder stat and motorised valve actuator as precaution but problem still exists. Cylinder stat fittted 1/4 - 1/3 up on cylinder and cylinder wall by stat is hot, cooling towards bottom.
Raise cylinder stat and pump and boiler fire up; Turn down and both switch off. Thought it may have been a sticky mechanical valve but when I've removed the actuator having switched the supply off, the mechanical valve spigot seems to be at 90 degrees to the pipe, indicating it's fully closed.
Boiler stat set to low setting and turned cylinder stat down to 50 which is perhaps a bit too low but got a hunch it won't help.
I keep coming back to a sticky mechanical valve but if that were the case, would the boiler not perhaps be on more continuosly or conversely be induced to switch on and off more ' rapidly '?
Any thoughts greatly welcome.
Thanks John
Have conventional vented fully pumped system. Replaced both hot water cylinder stat and motorised valve actuator as precaution but problem still exists. Cylinder stat fittted 1/4 - 1/3 up on cylinder and cylinder wall by stat is hot, cooling towards bottom.
Raise cylinder stat and pump and boiler fire up; Turn down and both switch off. Thought it may have been a sticky mechanical valve but when I've removed the actuator having switched the supply off, the mechanical valve spigot seems to be at 90 degrees to the pipe, indicating it's fully closed.
Boiler stat set to low setting and turned cylinder stat down to 50 which is perhaps a bit too low but got a hunch it won't help.
I keep coming back to a sticky mechanical valve but if that were the case, would the boiler not perhaps be on more continuosly or conversely be induced to switch on and off more ' rapidly '?
Any thoughts greatly welcome.
Thanks John