Worcester Repair Service

What does error code D1 240 mean on a Worcester Bosch boiler?

Error code D1 240 on a Worcester Bosch boiler indicates a return temperature sensor error. The sensor may be faulty, disconnected, wet, or damaged. Do not attempt to access internal components. Contact a Gas Safe registered engineer for sensor inspection and replacement.

What does error code EA 234 mean on a Worcester Bosch boiler?

Error code EA 234 on a Worcester Bosch boiler means flame not detected during ignition. The boiler is attempting to ignite but cannot detect a flame. Do not attempt to repair gas appliances yourself. Check that other gas appliances in your home are working to confirm gas supply. If you smell gas, do not operate any electrical switches, ventilate if safe, leave the property immediately and call the gas emergency line from outside. If there is no gas smell but the fault persists, contact a Gas Safe registered engineer for professional diagnosis.

What does error code EA 229 or D5 mean on a Worcester Bosch boiler?

Error code EA 229 or D5 on a Worcester Bosch boiler indicates a frozen condensate pipe or loss of ionisation signal. The condensate pipe drains water waste from the boiler to an external drain and can freeze during cold weather. In winter, locate the condensate pipe (small white or grey plastic pipe on the exterior) and pour warm (not boiling) water over the frozen section to thaw it. Do not attempt any repairs involving gas components. If thawing does not resolve the issue, or if you smell gas, do not operate any electrical switches, leave the property and contact a Gas Safe registered engineer from outside.

What does error code FB 365 mean on a Worcester Bosch boiler?

Error code FB 365 on a Worcester Bosch boiler indicates the gas valve EV1 leak test has failed. This is a critical safety fault indicating a potential gas leak from the valve. Do not use the boiler under any circumstances. If you smell gas, do not operate any electrical switches, ventilate if it is safe to do so, leave the property immediately and call the gas emergency line from outside. Contact a Gas Safe registered engineer immediately. Do not attempt to reset or operate the boiler until it has been inspected and repaired.

What does error code FA 364 mean on a Worcester Bosch boiler?

Error code FA 364 on a Worcester Bosch boiler indicates the gas valve EV2 leak test has failed. This is a critical safety fault indicating a potential gas leak from the valve. Do not use the boiler under any circumstances. If you smell gas, do not operate any electrical switches, ventilate if it is safe to do so, leave the property immediately and call the gas emergency line from outside. Contact a Gas Safe registered engineer immediately. Do not attempt to reset or operate the boiler until it has been inspected and repaired.

How do I calculate how many Worcester Bosch solar thermal panels I need?

The number of solar thermal panels required depends on household size and hot water demand. Worcester Bosch provide tools to help estimate potential hot water savings for domestic-sized solar thermal systems accommodating up to 6 occupants. Contact a qualified installer for a professional assessment of your specific requirements and to receive an accurate system specification.

What does the D5 error code mean on a Worcester Bosch boiler?

The D5 error code on Worcester Bosch boilers indicates a temperature sensor fault, often related to the return temperature sensor. Turn off the boiler. If you smell gas, do not operate any switches, leave the property immediately and call the gas emergency line from outside. If there is no gas smell, the fault can be caused by a faulty sensor, wiring issues, or in cold weather a frozen condensate pipe. Contact a Gas Safe registered engineer for diagnosis.

What is the difference between a timer, programmer and programmable room thermostat?

A boiler timer is a basic device that allows you to set times for your central heating, operating at the same times daily. A programmer allows you to set different times for heating and hot water, and can vary schedules across different days of the week. A programmable room thermostat combines timing with temperature control, allowing you to set different temperatures for different times. Worcester Bosch recommend settings of 21°C for comfort periods and 15°C for economy periods.

Do Worcester Bosch recommend treating the central heating water?

Yes, Worcester Bosch recommend using a suitable water treatment in the form of an inhibitor in the heating water system, following the water treatment manufacturer's instructions. The inhibitor concentration level should be checked every 12 months or sooner if system water content is lost. This helps protect the boiler and system components from corrosion and scale buildup.

How do I reset my Worcester Bosch boiler?

Before resetting a Worcester Bosch boiler, first check if you can smell gas. If you smell gas, do not operate any switches, ventilate if safe, leave the property immediately and call the gas emergency line from outside. If there is no gas smell, locate the reset button on the front panel (often marked with a flame symbol or the word 'reset'), press and hold it for 3 to 5 seconds, then release. The boiler should attempt to restart. If the boiler locks out again after resetting, do not continue to reset it. Contact a Gas Safe registered engineer to diagnose the underlying fault.