Looking at the pic and those particular valves I'll go with my first thoughts about the switch sticking.
Nothing to do with a domestic pump at all.
Nothing to do with a domestic pump at all.
Looking at the pic and those particular valves I'll go with my first thoughts about the switch sticking.
Nothing to do with a domestic pump at all.
When it happens again and the pump stays on, check the orange wire from the valve is de-energised when the programmer is set for OFF.
The orange wire feeds the boiler and pump if your system is wired correctly.
If it is still live then the microswitch in the valve is the most likely culprit.
Depending on your valves age it may be possible to change just the head.
Be careful as some live testing may be required. If in any doubt call in a heating repair man.
Yes, and that way you can ID which valve is faulty.Does this need doing on both valves?
Whilst you may well be right, I dont see anywhere where he has specifically said that.
OP, what 45 is suggesting is that the HW motor valve is sticking on. Whilst that could be a faulty switch its more often the valve is failing to return under the pressure of its internal spring.
Can you feel the lever so that you become accustomed to telling if its open or closed?
Then if it shows the fault again you can go to the valve and see if its actually stayed open.
Tony
If you need to find a tradesperson to get your job done, please try our local search below, or if you are doing it yourself you can find suppliers local to you.
Select the supplier or trade you require, enter your location to begin your search.
Are you a trade or supplier? You can create your listing free at DIYnot Local