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This system has been working ok for 2years,the hot water is working but the radiators are not.Ihave binded the wireless stat as per instructions and moved it nearer to boiler,usually it just fires up on continuous running.Have also tried reset button 3 times as per vaillant manual to no...

central heating system was working well but now wont fire up done usual checks batteries took thermostat nearer boiler seems to be talking to relay put controller on continuous put thermostat to 0 relay goes off comes back on at 20 any help would be appreciated boiler 2 year old vailliant eco...