I have a Vaillant Combi VCW GB 242 EH and it will not ignite,
No Spark, No Gas (No Voltage to Ignition Module for Ignition leads nor voltage to gas valve) Fan runs when Heating switched on, have replaced Flame & Spark Supervision board also replaced main elctronics board & pump replaced (partially siezed, turning slowly) Still it doesn't go! Really need some help or info with this.
Any more info required send me a message.
Thank you in advance for any replys

Paul

Paul, December 2006

Just thought I'd say a big thanx to Gasaid.co.uk & Jaz. New Air pressure Switch fixed it :o)

Paul, December 2006

Try the Air Pressure Switch. It needs to prove in order to send signal to ignition sequence and gas valve. Good Luck...

Jaz, December 2006

Try the APS.... Has been problematic on a lot of the appliances as the first round of HUBA switches kept breaking their limits.

GasAid.co.uk, December 2006