Boiler/central heating/water problems

[Matthew Copeland]

Hi guys,

Looking for some help.

Current arrangement: detached two story house, oil fired boiler in the garage. 12 radiators, 10 of which have control valves on them, two which don't. Hot water tank upstairs in the hotpress. Two thermostats on the wall, one upstairs and one downstairs (in the zones where the radiators don't have control valves.

Problem: recenty the hot water is getting extreamly hot (scalding almost). And when the time clock is 'off-red lights are out for heating' the radiators are still hot (scalding too). Also...when I go out to the garage the boiler still seems to be running. It's like it's independent of the time clock. Now we have to turn it off/on at the button with 'heating on it' - see pictures. We have tired turning the temperature down on both the hot water tank and the boiler - no change.

Thanks in advance!

 

[Mottie]

Is that a thermostat/temperature sensor hanging out of the boiler?

 

[Matthew Copeland]

I'm unsure. We had it serviced a few months ago and it's been like that ever since?

 

[D_Hailsham]

I'm unsure. We had it serviced a few months ago and it's been like that ever since?

If it was OK before the service, why haven't you called the service engineer back to fix the problem?

 

[Matthew Copeland]

We have...he said it was fine but it clearly isn't.

 

[D_Hailsham]

Is that a thermostat/temperature sensor hanging out of the boiler?

I'm unsure. We had it serviced a few months ago and it's been like that ever since?

Looks very like a temperature probe! What is it connected to (left of pic)?

Do you have one or two motorized valves?

 

[ServiceNumpty]

Fire valve phial.

 

[oilboffin]

Motorised valve sticking

 

[oilboffin]

Grant boiler house mod check thermostat is set right and check the motorised valves that one isn't sticking also check tank stat isn't to high.Bob