fit new valve tips

[norwoodt]

I am about to fit new honeywell 3 port mid pos valve, on a like for like basis,
(think the valve is sticking in one position, this making hot water too hot, and not heating the central heating enough)

any hints and tips before i wade in??

cheers

 

[dal5band]

Depending on how old it is you may be able to replace just the actuator - the box on top. Read some of the other posts about "Y" plan.
The motor in the actuator fails and the valve stops in the H/W position due to the spring.