Ferroli Appliance Repair in Langley Green & Tushmore

What does error F34 mean on a Ferroli boiler?

Error F34 on a Ferroli boiler means the power supply voltage has dropped below 170V. Check if other electrical appliances are working normally. If the problem persists, contact an electrician to check your electrical supply.

What does error F20 mean on a Ferroli boiler?

Error F20 on a Ferroli boiler (primarily Domiproject D/F models) indicates a combustion quality anomaly. This may be caused by fan failure, incorrect air aperture, blocked or incorrectly sized chimney, or electronic board issues. The boiler will attempt to restart automatically. If the fault persists, contact a Gas Safe registered engineer.

What does error A03 mean on a Ferroli boiler?

Error A03 on a Ferroli boiler means the overheating protection has activated due to no water circulation, air trapped in the system, or a damaged heating sensor. Check if radiators have cold spots indicating trapped air, ensure system pressure is between 1.0 and 1.5 bar. If the problem persists, contact a qualified engineer.

What does error A15 mean on a Ferroli boiler?

Error A15 on a Ferroli boiler means the air pressure switch fault (F05) has occurred five times within 24 hours, triggering a lockout. This indicates a persistent underlying problem - do not keep resetting the boiler and contact a Gas Safe registered engineer to diagnose and repair the root cause.

What does error A02 mean on a Ferroli boiler?

Error A02 on a Ferroli boiler indicates a flame is being detected when the burner should be off, suggesting an electrode or control board malfunction. This is a safety-critical fault - do not attempt repairs yourself and contact a Gas Safe registered engineer immediately.

What does it mean when my Ferroli boiler is in lockout?

A boiler lockout is a safety feature where the boiler shuts down completely due to a detected fault. Common triggers include low water pressure, ignition failure, no gas supply, overheating, or circulation problems. The display will typically show an error code indicating the cause.

Why is a magnetic filter important for my heating system?

A magnetic filter captures metallic debris and magnetite sludge from your heating system before it can damage the boiler. This black sludge builds up naturally over time from corrosion of radiators and pipework. Without a filter, debris can block the heat exchanger, damage the pump, and reduce efficiency. The filter should be cleaned during your annual boiler service.

When should I call a Gas Safe engineer for my Ferroli boiler?

Contact a Gas Safe registered engineer if you smell gas, the boiler is leaking water, you hear persistent banging or whistling noises, the same error code keeps appearing after reset, there is no heat or hot water despite troubleshooting, or the pilot light keeps going out.

Why is my hot water not hot enough from my Ferroli boiler?

Insufficient hot water temperature can be caused by the temperature setting being too low, limescale buildup in the heat exchanger, a faulty flow sensor, or issues with the diverter valve. First check your hot water temperature setting and increase it if needed. If you live in a hard water area, limescale may be restricting water flow and heat transfer. A Gas Safe registered engineer can diagnose and resolve persistent issues.

What does modulating burner mean on my Ferroli boiler?

A modulating burner automatically adjusts its output to match the heating demand of your home. Rather than running at full power and cycling on and off, the boiler continuously varies its flame size. This provides more stable temperatures, reduces energy consumption, and extends boiler life. Ferroli condensing boilers can modulate down to as low as 10% of their maximum output.