Solenoid Coil

Electric coil controlling the opening of the solenoid valve in the burner fuel pump. When voltage is applied, it generates a magnetic field that opens the valve.

Application

The coil is fitted onto the stem of the solenoid valve (44.251) in the fuel pump. On receiving an electrical signal in line with the ignition sequence, it generates a magnetic field that mechanically opens the valve, allowing fuel to flow to the burner nozzle.

Symptoms – when to replace

• The burner doesn't start despite a mechanically sound valve and correct supply voltage.
• The coil is noticeably hot or shows visible signs of burnt insulation.
• No electrical continuity or incorrect coil resistance measured with a multimeter.
• The characteristic valve click is audibly missing when trying to start the burner.

How to choose the right part

Selection is based on reference number 442511 – this is the coil alone, without the valve mechanism. If the problem is a leaking seal or mechanical sticking of the valve with a sound coil, the valve itself (44.251) will be needed instead.

During diagnosis, measure the coil's resistance with a multimeter before purchasing – a clear deviation from the typical value or an open circuit confirms the coil needs replacing, not the valve itself.