What the manual says
Manufacturer manualNo demand is present for the thermostat. Heating mode is blocked.
Shared across the range
This code is shared by the boilers in this range, which use the same control board. It may not be printed in this exact variant’s manual.
DIY fix possible
Check that your room thermostat is set to 'On' and the temperature dial is turned up higher than the current room temperatureEnsure any smart thermostat or app linked to your heating system is active and requesting heatCheck the system timer or programmer to see if it is currently set to an 'Off' period
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All 172 fault codes on the Turbomax 242/282 1E
Seeing a different code? Every code this model can display, in one place.
Burner lock out indicatorF.000F.001F.002F.003F.010F.011F.012F.013F.020F.022F.023F.024F.025F.027F.028F.029F.032F.035F.040F.042F.044F.047F.049F.057F.061F.062F.063F.064F.065F.067F.068F.070F.071F.072F.074F.075F.076F.077F.078F.080F.081F.083F.084F.085F.087F.088F.089F.090F.092F.095F.096F.097F.105F.194F.195F.196F.317F.318F.320F.321F.322F.323F.324F.325F.326F.327F.330F.334F.336F.337F.338F.342F.343F.344F.347F.363F.707F.905Fan operation indicatorFlame indicatorHot water demand indicatorI.003I.020I.144Ignition indicatorL.016L.022L.025L.032L.095L.096L.097L.105L.144L.194L.195L.196L.319L.320L.322L.343N.013N.027N.032N.089N.095N.096N.097N.100N.144N.194N.270N.317N.319N.324N.343Power on indicatorS.000S.001S.002S.003S.004S.005S.006S.007S.008S.009S.010S.011S.012S.013S.014S.015S.016S.017S.019S.020S.021S.022S.023S.024S.025S.026S.027S.028S.029S.031S.032S.034S.039S.041S.042S.054S.057S.059S.088S.091S.092S.093S.096S.097S.098S.109S.175S.199S.326S.328S.335S.341S.599