Manufacturer directory
Baxi Boiler Fault Codes
Fault-code information for Baxi boilers, grouped by verified boiler range. Each entry is linked to its own fault-code page.
Popular boiler ranges
Verified fault-code index
Baxi 200/400/600/800 and Assure 500 Combi/System common-code group
View range- A.02.06 — Baxi 200/400/600/800 and Assure 500 Combi/System common-code group
Low system pressure in the heating circuit.
Read fault code - E.00.04 — Baxi 200/400/600/800 and Assure 500 Combi/System common-code group
Return temperature sensor disconnected.
Read fault code - E.01.04 — Baxi 200/400/600/800 and Assure 500 Combi/System common-code group
Flame loss detected five times in 24 hours.
Read fault code - E.01.17 — Baxi 200/400/600/800 and Assure 500 Combi/System common-code group
No water circulation (permanent).
Read fault code - E.04.01 — Baxi 200/400/600/800 and Assure 500 Combi/System common-code group
Flow temperature sensor short-circuited.
Read fault code - E.04.03 — Baxi 200/400/600/800 and Assure 500 Combi/System common-code group
Maximum flow temperature exceeded or flow temperature sensor short-circuited.
Read fault code - E.04.10 — Baxi 200/400/600/800 and Assure 500 Combi/System common-code group
Burner failed to ignite after four attempts.
Read fault code - E.04.12 — Baxi 200/400/600/800 and Assure 500 Combi/System common-code group
Ignition failure — flame monitoring.
Read fault code - E.04.13 — Baxi 200/400/600/800 and Assure 500 Combi/System common-code group
Fan impeller blocked or maximum RPM exceeded.
Read fault code - E.04.17 — Baxi 200/400/600/800 and Assure 500 Combi/System common-code group
Fault in gas-valve control circuit.
Read fault code - H.00.42 — Baxi 200/400/600/800 and Assure 500 Combi/System common-code group
Pressure sensor open or faulty.
Read fault code - H.01.18 — Baxi 200/400/600/800 and Assure 500 Combi/System common-code group
No water circulation (temporary).
Read fault code - H.02.07 — Baxi 200/400/600/800 and Assure 500 Combi/System common-code group
Low pressure in the heating circuit (permanently).
Read fault code - H.03.05 — Baxi 200/400/600/800 and Assure 500 Combi/System common-code group
Power supply voltage too low.
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Baxi and legacy Baxi/Main/Potterton ranges listed on common-code page
View range- E09 — Baxi and legacy Baxi/Main/Potterton ranges listed on common-code page
Gas-valve connection fault.
Read fault code - E110 — Baxi and legacy Baxi/Main/Potterton ranges listed on common-code page
Boiler maximum temperature exceeded for gradient, or safety thermostat sensor tripped.
Read fault code - E118 — Baxi and legacy Baxi/Main/Potterton ranges listed on common-code page
Water pressure low (below 0.5 bar).
Read fault code - E12 — Baxi and legacy Baxi/Main/Potterton ranges listed on common-code page
Differential water-flow switch fault (still open).
Read fault code - E125 — Baxi and legacy Baxi/Main/Potterton ranges listed on common-code page
Water circulation fault.
Read fault code - E128 — Baxi and legacy Baxi/Main/Potterton ranges listed on common-code page
Safety error for frequent loss of flame.
Read fault code - E130 — Baxi and legacy Baxi/Main/Potterton ranges listed on common-code page
Flue thermostat sensor tripped (lockout).
Read fault code - E133 — Baxi and legacy Baxi/Main/Potterton ranges listed on common-code page
Gas supply fault.
Read fault code - E160 — Baxi and legacy Baxi/Main/Potterton ranges listed on common-code page
Fan fault.
Read fault code - E20 — Baxi and legacy Baxi/Main/Potterton ranges listed on common-code page
Central-heating NTC sensor fault — short circuit/open circuit.
Read fault code - E270 — Baxi and legacy Baxi/Main/Potterton ranges listed on common-code page
Dry fire.
Read fault code - E28 — Baxi and legacy Baxi/Main/Potterton ranges listed on common-code page
Flue NTC sensor fault — short circuit/open circuit.
Read fault code - E40 — Baxi and legacy Baxi/Main/Potterton ranges listed on common-code page
Return central-heating NTC sensor fault — short circuit/open circuit.
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