Ideal W2000 No Central Heating

I went to have a look at a system where the central heating was not working.

The system was a three-port motorised valve set-up, so I checked the wiring in the junction box . There was power on the white wire and the grey wire but the motorised valve was not opening.

I drained the heating system and replaced the valve, and heat tested the central heating.

Disclaimer: The works described in this blog are a record of work undertaken and should not be taken as guaranteed to solve your problem. Work should only be carried out by persons qualified and competent to do so.