Keston Appliance Repair in Matson, Robinswood and White City

What does error E01 mean on a Keston C36 boiler?

Error E01 on a Keston C36 boiler indicates ignition failure - the boiler has attempted to ignite five times without success. If you smell gas, do not operate any switches or appliances, ventilate the area if safe to do so, evacuate the property, and call the gas emergency services from outside. Otherwise, check that your gas supply is on and try resetting the boiler. If the error persists, contact a Gas Safe registered engineer.

What does error E24 mean on a Keston C36 boiler?

Error E24 on a Keston C36 boiler indicates water pressure has been lost four times in 24 hours, suggesting a possible leak. Check around radiators and pipework for signs of water and contact a heating engineer to locate and repair any leaks.

What does error E40 mean on a Keston C36 boiler?

Error E40 on a Keston C36 boiler indicates high water pressure. Check that the filling loop is closed. If necessary, bleed a small amount of water from a radiator. If pressure continues to rise during heating, contact an engineer to check the expansion vessel.

What does error E44 mean on a Keston C40 or C55 boiler?

Error E44 on a Keston C40 or C55 boiler indicates low water pressure. Use the filling loop to add water until pressure reaches approximately 1.2 bar. If pressure drops repeatedly, check for leaks and contact an engineer.

What does error E03 mean on a Keston C40 or C55 boiler?

Error E03 on a Keston C40 or C55 boiler indicates the gas valve is faulty or not properly connected. If you smell gas, do not operate any switches or appliances, ventilate the area if safe to do so, evacuate the property, and call the gas emergency services from outside. Do not attempt any repairs. Contact a Gas Safe registered engineer immediately as gas valve faults must only be handled by qualified professionals.

Why does my Keston combi boiler preheat periodically?

Keston combi boilers have a preheat function that fires the boiler briefly, approximately every 90 minutes, to keep water in the hot water calorifier warm. This reduces waiting time for hot water at the tap. If the boiler is installed in a bedroom or noise-sensitive area, the preheat function can be switched off using the preheat switch on the boiler.

How do I thaw a frozen condensate pipe on my Keston boiler?

Locate the condensate pipe, a white or grey plastic pipe running from the boiler through an external wall. Pour tepid water (not boiling) over the frozen section, or apply a hot water bottle around the pipe. Work from the top downwards. After thawing, press the restart button on the boiler.

How do I reset my Keston boiler after a fault?

For most Keston models, press the Restart button on the boiler fascia. For models with a mode control knob, turn it to the Reset position, then immediately return it to the On position. Switching the boiler off and on at the mains will not clear a fault lockout.

What is twin flue technology on Keston boilers?

Twin flue technology uses two separate pipes for air intake and exhaust gases, rather than a single concentric flue. This allows the flue to extend up to 27 metres from the boiler, compared to around 10 metres for standard concentric systems. Twin flue is ideal for installations where the boiler cannot be positioned near an external wall, such as basements or internal plant rooms.

How can I save on energy bills with my Keston boiler?

Schedule an annual service to maintain peak efficiency. Keep the boiler pressure correct and bleed radiators regularly. Use programmable or smart thermostats to avoid heating when the home is empty. Turn radiators down or off in rooms that are rarely used. Consider lowering the flow temperature on modern condensing boilers.