Thank you - it's only the pump and not the boiler that stays on? What should be the next step? I'm not sure what advice I should be following. Thansk again everyone
Thank you for your response.
Just so that I'm crystal clear (not done anything like this before) is the mid position valve the device that says "drayton mid position actuator". What exactly is the microswitch? is that what i'm going to free-up? Also what should i lubricate with? will wd40...
The pump on my central heating system is on permanantly even when hot water and heating button are switched off. Only way to stop it is to cut the mains switch.
The system has not been touched, no new parts, no serivce or anything.
Where the pump is fitted there then follows one of these...