This Quick Tutorial Will Guide you Through the Steps for Checking for Proper Fuel Pump Cut-off
Perform a Pump Cut-off Test if you are Experienceing Any After Drip or Rumbles/Flutters at Burner ShutdownÂ
Sample 1: Begin bydeadheading a pressure gauge into the nozzle port. The bleed port will NOT test cut-off.
Sample 2: Dead head a pressure gauge into the nozzle port. Make sure all fittings are tight before starting.
Turn the burner on and observe the pressure reading.
Shut the burner off. The pressure should drop 15% to 20% and hold.
If the pressure drops below 20% or slowly back to zero, replace the fuel pump.