BoilerFaultCodes.com

Ravenheat CS 80/90, WH System, WH 80/90 Fault Codes

CombiSystem Natural GasLPG 23.4-26.4 kW 2000-2010 Discontinued
GC Numbers: 47-581-0147-581-0241-581-0747-581-0447-581-05

Replaced by: CSI 120

The fault code is already on your display

Note it down before pressing reset — resetting clears the code immediately. How to read fault codes →

Most common fault codes

E02
Your boiler has stopped working because water is not moving through the system properly, which is causing it to overheat and shut down for safety.
May be DIY safe · £180-350
E03
Your boiler has detected an issue with the sensor that monitors water movement, preventing the system from heating up properly.
Gas Safe engineer required · £125-£210
E05
Your boiler has detected an issue with the fan that clears exhaust gases, preventing the system from starting for safety reasons.
Gas Safe engineer required · £180-350

All 21 fault codes

Code Severity Plain English
E02 High Your boiler has stopped working because water is not moving through the system properly, which is causing it to overheat and shut down for safety.
E03 High Your boiler has detected an issue with the sensor that monitors water movement, preventing the system from heating up properly.
E04 Medium Your boiler has detected a problem with the sensor that monitors hot water temperature, meaning you will likely have no hot water or inconsistent temperatures.
E05 High Your boiler has detected an issue with the fan that clears exhaust gases, preventing the system from starting for safety reasons.
E06 High Your boiler has detected that the water temperature in your heating system is getting too high, causing it to shut down for safety.
E08 High Your boiler has detected that there is not enough water in the system to operate safely and has shut down to prevent damage.
E09 High Your boiler has shut down because it has detected its internal temperature is getting too hot, usually caused by a blockage or a pump failure.
E10 Emergency Your boiler has too much water in the system, which puts extra stress on the internal components.
E13 High Your boiler's internal computer has encountered a glitch or a configuration error and cannot communicate properly with the system.
E21 High Your boiler has detected that the water returning from your radiators is too hot, causing the system to shut down to prevent damage.
E22 High Your boiler has sensed that the exhaust gases are becoming too hot and has shut down as a safety precaution.
E23 High Your boiler has detected a fault with the sensor that monitors exhaust gases, and as a safety precaution, it will not operate until this is fixed.
E24 High Your boiler has detected a problem with the sensor that monitors the water temperature returning from your radiators, preventing the system from operating correctly.
E25 High Your boiler has detected that the water inside the main heating unit has frozen due to extremely cold temperatures, preventing it from operating.
E29 High Your boiler has detected that the water used for your taps and showers is getting too hot, causing the system to shut down for safety.
E31 High Your boiler has lost its digital connection with your external smart thermostat or heating controls, meaning it cannot receive instructions to turn on.
E41 High Your boiler has sensed an unusual temperature difference between the water leaving it and the water returning, suggesting that water is not circulating through your heating system correctly.
E42 High Your boiler has detected that heat is not moving through the system correctly, usually meaning the water is hotter in one part of the machine than another.
E43 High Your boiler has detected an unusual temperature difference between internal parts, suggesting that water is not circulating correctly through the system.
E44 High Your boiler has detected an unusual temperature difference between internal sensors, suggesting a possible circulation issue or a faulty component.
E46 High Your boiler is having trouble monitoring its internal water pressure, which has caused it to stop working for safety.

Ravenheat CS 80/90, WH System, WH 80/90 is discontinued — time for a new one?

Parts for discontinued models can be hard to find and expensive. A new A-rated boiler could save you money on both repairs and energy bills.

UK's #1 online installer
Boxt
Fixed-price online quotes. Next-day installation.
Get a free quote →
Heatable
Instant online boiler quotes from £1,499.
Get a free quote →
iHeat
Fast installation. Price match guarantee.
Get a free quote →

Affiliate links — we may earn a commission at no extra cost to you.