30Burnerfails toRunNo PowerNoDemandCheck Isolator Check FusesCheckControlsBurner LockoutFan / LimitThermostatRoomThermostatTimerHeat / VentilateSwitchOn / Off Switch6.0 Fault Diagnosis by Flow ChartBurnerstartsIgni tionsequencebut fails tolight a ndLock outO ccur sFuel FeedIn correctCheck that theOil Pres sure iscorrectC he ck th at Hea do f Gr avity i sS u ffici en tCheck that t hes uction Lift is nott oo great (twopipe sy stem )Check that t heBy pas s Plug isP res entFuel / A irP rob lemCh eck BurnerAir S ettingB leed Sys temAir in Sy stemRes tric ted FuelFee dNo Spark Ch eckElectrodeP oss ible Fu elContaminationChe ck Valves,Fuel Feed, Filt erNoz zle forB loc kag es orRes tric tionsChec k Control