Keston Appliance Repair in Barton and Tredworth

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 E67 mean on a Keston Qudos boiler?

Error E67 on a Keston Qudos boiler indicates low water pressure below 0.4 bar. Use the filling loop to repressurise the system to approximately 1.2 bar. If pressure drops repeatedly, check for leaks and contact an engineer.

What does error F9 mean on a Keston S30 boiler?

Error F9 on a Keston S30 boiler indicates an unconfigured PCB - the main circuit board requires configuration. Contact a Gas Safe registered engineer or Keston service to reconfigure the PCB.

What does error L2 mean on a Keston S30 boiler?

Error L2 on a Keston S30 boiler indicates flame loss lockout, commonly caused by a frozen condensate pipe in winter. 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, locate the condensate pipe and pour warm water along it to thaw. Reset the boiler once thawed. If the fault persists, contact a Gas Safe registered engineer.

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.

What pressure should my Keston boiler be at?

The ideal pressure for a Keston boiler is between 1.0 and 1.5 bar when the system is cold. This is displayed on the pressure gauge on the front of the boiler. Pressure naturally rises slightly when the heating is on. If pressure drops below 0.3 bar, the boiler will stop operating.

How do I repressurise my Keston boiler?

Turn off the boiler and allow it to cool for at least an hour. Locate the external filling loop beneath the boiler. Attach the filling loop, open both valves slowly, and watch the pressure gauge until it reaches 1.0 to 1.5 bar. Close both valves, then remove and store the filling loop.

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 often should my Keston boiler be serviced?

Keston boilers should be serviced annually by a Gas Safe registered engineer. This annual service maintains operational efficiency and safety. The best time to arrange a service is during summer when engineers are less busy.