0x04F0E7, Combustion Air Fan Malfunction
- check combustion air fan - replace combustion air fan - for further information see workshop manual - clean error memory
What you'll see
No driver-visible symptom recorded.
System reaction
- this DTC is stored in the error memory. - heating operation is stopped
Diagnostic depth
Enable Condition: This error is monitored while heater is in combustion mode. (LS.Internal.HeaterStateSimplified = HeaterBurnerStarting or LS.Internal.HeaterStateSimplified = HeaterBurnerActive or LS.Internal.HeaterStateSimplified = HeaterBurnerStopping) Mature Threshold: Combustion air fan error. This DTC is reported by the heater core software. De-mature Criteria: Heating request is switched off (HeaterModeRequest = DeactivateHeater) and on (HeaterModeRequest = NormalMode) and state HEATER RUNNING is reached
- blocked or stiff fan - blower RPM can not be regulated to required rated value