I want to fit a wireless roomstat to an existing Vaillant Turbomax boiler. The boiler already has a good timer controller fitted in the plug in fascia but I wish to control it via a roomstat, but do not want to go to the expense of a Vaillant wireless roomstat controller. Can anyone suggest a suitable stat and what the connections are on the boiler?

Andy D, January 2009

terminal connectors 3, 4 and 5 on the pcb are the stat live, switched live and neutral (if required)

tojo, February 2009