While you wait for answers, we may have found some information which could help you.
Click here for Turbomax 242 BoilerVaillant vcw gb242 eh central heating problem?
Vaillant condensing boiler ecoTEC plus?
Vailliant turbo max plus 824e?
Vaillant eco plus 531 boiler?
Vaillant VCW-Sine18 T3WFH Lights but then goes off after 5 Min?
Advice?