Midpoint actuator or valve issue
The issue I am having is that the central heating is not turning off when scheduled to. It appears to be a fault with either the midpoint actuator or the brass valve. The actuator stays in the central heating position so I have to remove the actuator box and turn the spindle using pliers. It’s too stiff to move by hand.
Does this sound like a problem with the actuator box (which is 9+ years old) or the brass valve itself?
Thanks in advance for your help.
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