Problems with a boiler activity

[sarav]

We have an old Stelrad Ideal WLX boiler which has been working perf0ectly and is regularly serviced.

We are now having a problem with the radiators heating up when the programmer switches on the hot water. The programmer is set to keep the central heating off all of the time and only activate the hot water function (programmer is a SUNVIC 207 Select XL).

Obviously we are in the middle of a heatwave and to say that its inconvenient to find the radiators churning out heat just because you want a bath is an understatement!

What I should also mention is that we have recently had the electricity off and also the mains feed for water off for work to be done on our kitchen. The boiler was however turned off while the water was off.

I have taken the programmer off and re-programmed it about 6 times.

Can anyone help? Not sure whether the action of taking the water on and then putting it back on full blast may have damaged the diverter or diaphragm in the boiler?

Is the solution to the problem as simple as the cause seems to be? I know that any engineer that we get out is going to recommend replacing the boiler due to its age but having just forked out for the kitchen I'm a few beans off being able to do that just now!

Help much appreciated.

 

[ColJack]

sounds like the 2 way valve is stuck in mid position, meaning that you're heating all the water, not just the hot water..

ask in the plumbing section to confirm.. they deal with this stuff more than we do..

 

[flameport]

The valve is broken, or if the system was drained down when the kitchen work was done, someone has set it to 'manual' (usually a lever on the side of the valve if it has such a feature).

The solution is either -
move the lever to auto
replace the valve motor only
replace the whole valve

 

[gavinda]

i wouuld suspect that when the system was drained the valve was left in the manual position to allow the system to drain. simply turn the heating ON on the clock and room stat then off again. this should sort the problem immediately. if this doesnt then you need to replace your 3 port or 2 port valve.


btw hope your old boiler isnt in your new kitchen.

 

[Agile]

Some 3-port valves have a manual lever to lock them into the mid position.

If thats the case the slide the lever out of the little notch and let it back down the long slot.

Tony