Boiler Fault Finder

240 V TEST

240v Warning Sign 240 V TEST

  • Connect boiler to power supply via 3 pin plug top or inserting 3 amp fuse into switch
  • Ensure boiler is on but with all controls off, so there is no demand
  • Set multimeter to correct voltage scale on V AC
  • Firstly put the black lead from multi meter to the E terminal block on the boiler then secondly the red lead from multi meter to the L terminal block on the boiler – this should read approx. 240V AC

240v mains test

240v Warning Sign 240 V TEST

  • Ensure boiler is on but with all controls off, so there is no demand
  • Set multimeter to correct voltage scale on V AC
  • Firstly put the black lead from multi meter to the N terminal block on the boiler then secondly the red lead from the multi meter to the L terminal block on the boiler – this should also read approx. 240V AC