Find Your Error Code
Code: T1
Cause:
Ignition test – checking the igniter spark
Difficulty:
1 2 3 4 5
Engineer:
-
Solutions To Try:
Engineer Service Test Code.
Code: T2
Cause:
Fan test – checking the basic fan
Difficulty:
1 2 3 4 5
Engineer:
Required
Solutions To Try:
Engineer Service Test Code
Code: T3
Cause:
Pump test – checking the basic pump
Difficulty:
1 2 3 4 5
Engineer:
Required
Solutions To Try:
Engineer Service Test Code
Error Code: T4
Cause:
Three way valve test
Difficulty:
1 2 3 4 5
Engineer:
Required
Solutions To Try:
Engineer Service Test Code
Error Code: T6
Cause:
Ionisation oscillator test
Difficulty:
1 2 3 4 5
Engineer:
Required
Solutions To Try:
Engineer Service Test Code
Error Code: 9A 362
Cause:
error – incorrect HCM fitted
Difficulty:
1 2 3 4
5
Engineer:
Required
Solutions To Try:
Engineer to inspect HCM and test. Replace if necessary.
Error Code: 9U 233
Cause:
Heat Control Module (HCM) error – problem with code plug
Difficulty:
1 2 3
4 5
Engineer:
Required
Solutions To Try:
Engineer to check code plug.
Error Code: B7 257
Cause:
Internal error – possible control board problem
Difficulty:
1 2 3 4
5
Engineer:
Required
Solutions To Try:
Engineer to check internal PCB. Replace if required.
Error Code: C6 215
Cause:
Fan problem – fan running too fast
Difficulty:
1 2 3 4
5
Engineer:
Required
Solutions To Try:
Test fan and check board.
Error Code: C7 214
Cause:
Fan problem – fan not running
Difficulty:
1 2 3 4
5
Engineer:
Required
Solutions To Try:
Engineer to check leads and connections.
Error Code: D1 240
Cause:
Return sensor error – sensor may be wet or damaged
Difficulty:
1 2 3
4 5
Engineer:
Required
Solutions To Try:
Engineer to check sensor. Check for any damage.
Error Code: E2 222
Cause:
Flow sensor short circuit error
Difficulty:
1 2 3
4 5
Engineer:
Required
Solutions To Try:
Engineer will need to check flow sensor connection and leads.
Error Code: E5 218
Cause:
Flow temperature too high
Difficulty:
1 2 3
4 5
Engineer:
Required
Solutions To Try:
Check temp sensors, check for blockage and possible air in the system. check pump performance.
Error Code: E9 219
Cause:
Safety sensor fault – temperature too high, sensor short circuit or open circuit
Difficulty:
1 2 3
4 5
Engineer:
Required
Solutions To Try:
Check temp sensors, check for blockage and possible air in the system. check pump performance.
Error Code: EA 227
Cause:
No flame detected or flame signal loss during operation
Difficulty:
1 2 3
4 5
Engineer:
Required
Solutions To Try:
Check gas inlet pressure. Check sensors and leads. Check gas control unit.
Error Code: F0 237
Cause:
Internal error
Difficulty:
1 2 3 4 5
Engineer:
Required
Solutions To Try:
Site visit required from engineer.
Error Code: F7 228
Cause:
Flame error – false flame or flame detected before burner started
Difficulty:
1 2 3 4
5
Engineer:
Required
Solutions To Try:
Engineer to check flame detection sensor and leads. Check PCB.
Error Code: FA 306
Cause:
False flame fault – flame detected after burner stop
Difficulty:
1 2 3
4 5
Engineer:
Required
Solutions To Try:
Engineer to check flame detection sensor and leads. Check PCB.
Error Code: FD 231
Cause:
Mains power fault – electrical power interruption
Difficulty:
1 2 3
4 5
Engineer:
Required
Solutions To Try:
Engineer to check electricla supply to boiler and conenctions inside boiler.
Error Code: FA 364
Cause:
Gas valve EV2 leak test failed – gas valve leak
Difficulty:
1 2 3 4
5
Engineer:
Required
Solutions To Try:
Engineer to check gas valve. Replace if necessary.
Error Code: FB 365
Cause:
Gas valve EV1 leak test failed
Difficulty:
1 2 3 4
5
Engineer:
Required
Solutions To Try:
Engineer to check gas valve. Replace if necessary.
Error Code: A1 281
Cause:
Pump stuck or running with air in the system
Difficulty:
1 2 3 4
5
Engineer:
Required
Solutions To Try:
Engineer will need to check and test pump and vent system. Top up if required.
Error Code: C1 264
Cause:
Airflow stopped during operation
Difficulty:
1 2 3 4
5
Engineer:
Required
Solutions To Try:
Engineer to check flue inlet and interally inspect boiler.
Error Code: C4 273
Cause:
Airflow present during last 24 hour
Difficulty:
1 2 3 4 5
Engineer:
Required
Solutions To Try:
Site visit required by engineer.
Error Code: D1 240
Cause:
Return sensor short circuit
Difficulty:
1 2 3
4 5
Engineer:
Required
Solutions To Try:
Engineer to check and test sensor.
Error Code: D4 271
Cause:
Temperature difference between flow and safety sensor exceeds limit
Difficulty:
1 2 3 4
5
Engineer:
Required
Solutions To Try:
Engineer to check safety sensors and check for blockages,
Error Code: E9 224
Cause:
Max thermostat activated – flue gas thermostat overheat
Difficulty:
1 2 3
4 5
Engineer:
Required
Solutions To Try:
Engineer will need to inspect boiler and flue.
Error Code: EF 349
Cause:
Central heating boil detected – boiler operating at minimum burner load with temperature difference greater than 18°C between Flow & Return.
Difficulty:
1 2 3 4
5
Engineer:
Required
Solutions To Try:
Engineer to check pump operation and check temp sensors.
Error Code: NO CODE 212
Cause:
Safety or flow temperature rising too fast
Difficulty:
1 2 3
4 5
Engineer:
Required
Solutions To Try:
Check pump operation, check heat exchanger, check blockages and check ensors.
