Keston Appliance Repair in Westgate

What does error E52 mean on a Keston Qudos boiler?

Error E52 on a Keston Qudos boiler indicates flue overheat. This requires a service reset and professional inspection. Contact a Gas Safe registered engineer immediately.

What does error E70 mean on a Keston Qudos boiler?

Error E70 on a Keston Qudos boiler indicates cabinet overheat. This is a serious fault requiring a service reset. Allow the boiler to cool completely and contact a Gas Safe registered engineer immediately.

What does error F2 mean on a Keston S30 boiler?

Error F2 on a Keston S30 boiler indicates flame loss during operation. 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 if the condensate pipe is frozen and thaw if necessary. Try resetting the boiler. If the fault recurs, contact a Gas Safe registered engineer.

What does error E03 mean on a Keston C36 boiler?

Error E03 on a Keston C36 boiler indicates boiler overheat. Allow the boiler to cool down, check that radiator valves are open and the pump is running. Contact a qualified engineer to investigate potential blockages and pump operation.

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.

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 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.

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 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.

Why is my Keston boiler making unusual noises?

Gurgling usually indicates trapped air and can be resolved by bleeding radiators. Banging may indicate pressure irregularities or sediment buildup. A high-pitched whistling (kettling) suggests limescale in the heat exchanger. For persistent noises other than gurgling, contact a Gas Safe registered engineer.