Riello Fuel Pump / Oil Supply Failure

Furnace burner fan runs but there is no oil flow (no sound of combustion, no pressure at nozzle)

This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.

If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.

Possible Causes

Failed Riello fuel pump, Sheared pump coupling, Closed oil valve, Severely clogged filter or strainer

Safety: Turn off power and close oil valve.

Steps:

Verify valves and filter: Ensure oil valves are open and replace the oil filter.
Check pump coupling: Remove pump cover and inspect the coupling between motor and pump. Replace if broken.
Test pump output: A technician should measure pump pressure and flow; replace the pump if it cannot build pressure.

Hard 4/5

Riello Fuel Pump

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