BoilerFaultCodes.com

Potterton Flamingo RS40 RS50 Fault Codes

Regular Natural Gas 11.7-14.7 kW 1970s-1980s Discontinued
GC Numbers: 41-591-1841-591-19

Replaced by: Suprima

The fault code is already on your display

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

All 22 fault codes

Code Severity Plain English
A High Your boiler's small starter flame is failing to stay on, which means the main heater cannot start up to provide warmth or hot water.
A(1) High Your boiler is not receiving the gas it needs to light, meaning it cannot provide heating or hot water.
A(2) Low Your boiler's ignition button hasn't been pushed in far enough or held long enough to start the pilot light.
A(3) High Your boiler is struggling to light because the small pipe that starts the main flame is clogged with dust or debris.
A(4) High Your boiler is struggling to stay lit because the small starter flame is being blocked by a buildup of soot or debris.
A(5) High Your boiler is unable to create the spark needed to light the flame, which means your heating and hot water will not work.
A(6) High Your boiler is unable to create the spark needed to light the gas because the ignition part or its wiring is faulty.
B High Your boiler's pilot light is failing to stay lit, which means the main burner cannot start to heat your home.
B(1) Low Your boiler has failed to light because the start-up button was released too quickly during the ignition process.
B(2) High Your boiler's pilot light is likely going out because a safety sensor has lost its connection, preventing the unit from staying lit.
B(3) High Your boiler's small starter flame is either too weak or not staying lit, which is preventing the main burner from firing up to provide heat.
B(4) High Your boiler's small starter flame is struggling to stay lit because of a buildup of dust or debris, preventing the main heating from firing up.
B(5) High Your boiler's pilot light has gone out and will not stay lit, meaning the system cannot fire up to provide heating or hot water.
C High Your boiler's small pilot light is on, but the main heating flame is failing to ignite, meaning your central heating will not work.
C(1) Low Your boiler is currently turned off or the temperature dial is set too low to trigger the heating.
C(2) Low Your boiler is working fine, but your external thermostat or timer is not telling it to turn on.
C(3) High Your boiler is unable to light the gas burner because a safety control valve inside the unit has stopped working.
C(4) High Your boiler's temperature control dial is no longer reading the heat correctly, causing the system to shut down or behave inconsistently for safety.
C(5) High Your boiler is unable to light because the small nozzle that delivers gas to the main burner has become clogged with debris.
D Emergency Your boiler is failing to turn off even when the water has become hot enough, which could lead to dangerous overheating.
D(1) High Your boiler's internal temperature control sensor is failing or reporting incorrect information, preventing the system from heating up properly.
D(2) Emergency Your boiler's gas valve is not closing properly because of debris, which could lead to an unsafe gas buildup within the unit.

Potterton Flamingo RS40 RS50 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.