Saunier Duval Appliance Repair in Ifield

What does error F8 mean on a Saunier Duval Isotwin Condens boiler?

Error F8 on a Saunier Duval Isotwin Condens boiler indicates a tank thermistor fault. The hot water storage tank temperature sensor (NTC) is faulty or has a wiring problem. Switch off the boiler and contact a Gas Safe registered engineer to inspect and replace the sensor if necessary.

What does error code 19 mean on a Saunier Duval Themaclassic boiler?

Error 19 on a Saunier Duval Themaclassic boiler indicates the central heating thermistor is unplugged. The sensor is not connected properly. Switch off the boiler and contact a Gas Safe registered engineer to secure the connection.

What does error 0 & 2 (also shown as 02) mean on a Saunier Duval Ecosy boiler?

Error 0 & 2 on a Saunier Duval Ecosy boiler (display alternates between 0 and 2, also referred to as code 02) indicates no flame ionisation. The boiler is not detecting a flame. Do not attempt to fix this yourself. If you smell gas, do not operate any switches, ventilate the area if safe to do so, leave the property and call the Gas Emergency Service from outside. If there is no gas smell, check your gas supply is on. If gas is available, contact a Gas Safe registered engineer to check the electrode and gas supply.

What does error code 07 mean on a Saunier Duval Isofast boiler?

Error 07 on a Saunier Duval Isofast boiler indicates a domestic hot water NTC sensor fault. The DHW temperature sensor is faulty or disconnected. Switch off the boiler and contact a Gas Safe registered engineer.

What does 2.7bar mean on a Saunier Duval Themaclassic boiler?

The 2.7bar display on a Saunier Duval Themaclassic boiler indicates high water pressure. You may need to release water via a radiator bleed valve. If unsure, contact a Gas Safe registered engineer.

What should I do if my Saunier Duval boiler keeps losing pressure?

If your boiler frequently needs repressurising, there is likely a leak somewhere in the heating system. Check visible pipework, radiator valves, and connections for any signs of water. The pressure relief valve may also be discharging water if the system is overpressurised or the expansion vessel has failed.

What should I do if I smell gas near my Saunier Duval boiler?

If you smell gas, do not operate any electrical switches including boiler controls. Open doors and windows to ventilate the area. Turn off the gas supply at the meter if it is safe to do so. Leave the property and call the National Gas Emergency Service immediately from outside. Do not return until a Gas Safe registered engineer has confirmed it is safe.

What should I do if my Saunier Duval boiler shows 2.7bar?

The 2.7bar display indicates that water pressure has exceeded the safe operating limit. Excessive pressure can damage boiler components and may cause the pressure relief valve to discharge water. You may need to release some water from the system via a radiator bleed valve to reduce pressure.

What is the expansion vessel and why is it important?

The expansion vessel is a small tank inside your boiler that absorbs the increased water volume as the heating system heats up. Without a functioning expansion vessel, system pressure would rise dangerously high when hot and drop when cold. Signs of a faulty expansion vessel include pressure rising significantly when heating is on and dropping when cold, or the pressure relief valve discharging water. Expansion vessel maintenance should be part of the annual service by a qualified engineer.

What is included in a Saunier Duval boiler service?

A typical annual service includes operating the boiler to check for faults, inspecting the burner and heat exchanger, cleaning components as needed, checking the flue system for obstructions and secure fittings, verifying correct gas pressures, testing safety devices, and checking all gas connections for leaks using detection fluid.