BoilerFaultCodesWhat the manual says
Manufacturer manualFlame Loss
Shared across the Atlantic Combi 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.
Engineer required
This is a high severity fault. Stop using the boiler and call a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.
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All 59 fault codes on the Atlantic Combi
Seeing a different code? Every code this model can display, in one place.
4.34.44.54.64.74.84.94.104.114.1282838485868990F[-]F1F2F2 or Fn or LnF3F4F5F6F7F8F8 or L8F8/L8F9F9 or L9F9/L9FAFan faultFlame lossFlow thermistor faultFUIgnition lockoutL 2L CL[-]L1L4L4 or F4L5L5 or F5L6L8L9LnLow mains voltageLow water pressureNo DisplayOutside sensor faultOverheat lockoutPCB FaultReturn thermistor faultWater Pressure