Ambirad Fault Codes

Welcome to the fault-codes section of this site. The following table or page contains the information required to help repair and diagnose the fault codes being shown on the boiler display. You may be guided through the fault finding sequence or steps, for rectifying your boiler with this fault code. Suggested repair solutions may be provided by a link to a repair page. NB Some fault codes are only applicable to a specific range of boilers only.

CodeDescriptionSymptomPossible causeRemedyModel Specific
#*_ _COMMUNICATION FAILURE.No control on faulty unitBad data cable connection
Damaged cable
Check data cable(s) and plugs
Repair/replace damaged cable
SmartElec2
# E1AIR SENSOR TEMPERATURE TOO HIGH
AIR SENSOR FAILURE.
Fan operating, no heat-High ambient air temperature
-Impeller turning in wrong direction
-Motor failure
-Air sensor cable disconnected
- Air sensor broken

Check ventilation
Check rotation of impeller
Check motor & replace if necessary
Check cable
Replace air sensor




SmartElec2
# E3HEATSINK TOO HOTFan operating, no heatHigh ambient air/faulty base unitReplace SmartElec base unitSmartElec2
# E4HEATSINK SENSOR FAILUREFan operating,no headHeatsink sensor wiring disconnected/faultyCheck wiringSmartElec2
# E5EXTERNAL TEMPERATUREUnit runs, but no external temperature controlExternal temperature sensor faultyReplace sensorSmartElec2
# E6OVERHEAT THERMOSTAT OPEN CIRCUITFan operating, no heatOverheat thermostat open circuitReset/replace overheat thermostatSmartElec2

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