12 fault codes with plain-English explanations, severity ratings, DIY guidance, and repair cost estimates.
Replaced by: Capriz2 24
This boiler uses LED flash patterns
Count the flashes in one repeating group before the pause. That number is your fault code. Do not reset until you have noted it. How to read fault codes →
The GC number on your boiler's data badge identifies the exact appliance and production years, as recorded in the UK Product Characteristics Database.
| GC number | Appliance (register name) | Produced |
|---|---|---|
| 41-157-10 | Capriz 25S | 2008–2009 |
| 41-157-11 | Capriz 28S | 2008–2009 |
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Your boiler has lost the ability to accurately measure the temperature of the water used for your radiators, causing it to shut down for safety.
Your boiler is struggling to read the outdoor temperature, which means it cannot automatically adjust your heating to match the weather conditions.
Your boiler is struggling to clear exhaust fumes because it cannot confirm that the internal fan is venting air correctly.
Your boiler has failed to light the flame properly or is not receiving gas, so it has shut itself down as a safety precaution.
Your boiler is struggling to accurately measure the temperature of the water used for your taps and showers.
Your boiler has stopped working because the water pressure inside the heating system has dropped too low.
Your boiler has detected that it is getting too hot and has automatically switched itself off to prevent any damage or safety hazards.
Your boiler has stopped working because the water pressure inside the heating system has dropped too low.
Your boiler has lost the ability to accurately measure the temperature of the water being sent to your radiators, so it has shut down to prevent the system from getting too hot.
Your boiler has switched itself off because it has detected an unsafe temperature level, likely due to a blockage in the water flow or a faulty temperature sensor.
Your boiler is failing to light because it cannot detect a flame, meaning you currently have no heating or hot water.
Your boiler has detected that it is getting too hot and has automatically shut itself down to prevent damage.
BoilerFaultCodes