Keston Appliance Repair in Newtown and St Leonard's

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 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 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 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 E02 mean on a Keston C36 boiler?

Error E02 on a Keston C36 boiler indicates false flame detection - the boiler is detecting a flame signal before ignition has started. This requires a Gas Safe registered engineer to check the power supply polarity and flame sensing electrode.

What is the Benchmark commissioning checklist for Keston boilers?

The Benchmark commissioning checklist is a document completed by your Gas Safe registered installer when commissioning your Keston boiler. It confirms the boiler has been installed correctly according to manufacturer guidelines and Building Regulations. The completed checklist should be left with the boiler and is required for warranty validation. Keep it safe with your boiler documentation.

How do I adjust the hot water temperature on my Keston combi boiler?

On Keston combi boilers, the domestic hot water temperature is adjusted using the hot water temperature knob on the control panel. The temperature can be set between approximately 40 and 65 degrees Celsius. A setting of 50 to 55 degrees is recommended for safety, as this prevents scalding while being hot enough to prevent bacterial growth.

What is a Keston magnetic system filter and do I need one?

A Keston magnetic system filter protects your boiler by capturing sludge, debris, and magnetic contaminants from the heating system. Installing a Keston 22mm System Filter with a Combi or System boiler extends the warranty from 5 to 7 years. The filter should be cleaned during annual servicing. It is fitted on the return pipe close to the boiler.

How do I prepare my Keston boiler for winter?

Run the boiler and radiators at maximum temperature for approximately 15 minutes to identify any problems. Check visually for signs of damage, leaks, or loose connections. Bleed your radiators to release trapped air. Check the pressure gauge and repressurise if below 1.0 bar. Insulate exposed condensate pipework to prevent freezing.

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.