Vaillant

Vaillant CI-SI Boiler Error Codes

Fault Codes Fault Description Possible Causes Fault Code F1 Ignition Failure Insufficient Inlet Working Gas Pressure At The Appliance Flue Problem Spark Generation Issue Incorrect Gas Valve Adjustment (Minimum Burner Pressure Set Too Low) Flame Rectification Issue Combustion Issue (Poor Flame Picture) Software Error On The Main PCB Or The User Interface PCB Fault Code F2 Air Fault Fan Fault Fan …

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Vaillant EcoTEC Plus Regular Gas Boiler (Diagnostic Codes)

Vaillant EcoTEC Plus Regular Gas Boiler Error Codes (Diagnostic Codes) D.0 Heating part load error D.1 Water pump overrun – time for heat mode D.2 Max burner anti-cycling period at 20c flow temperature D.3 Hot water flow temperature reading D.4 Current temperature for warm stat sensor D.7 Warm start temperature target value D.8 External controls …

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Vaillant EcoTEC Plus Regular Gas Boiler Error Codes (Status Codes)

Vaillant EcoTEC Plus Regular Gas Boiler Error Codes Fault Code Possible Cause S.20 Warnstar demand S.21 Fan running S.22 Pump running S.23 Ignition sequence S.24 Burner ignited S.25 Fan and water pump running S.26 Fan overrun S.27 Pump overrun S.28 Anti-cycling mode S.30 No heating demand from external controls S.31 Central heating thermostat knob turned …

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Vaillant EcoTEC Pro / EcoTEC Plus Error Codes ( Fault Codes )

Vaillant EcoTEC Pro / EcoTEC Plus Error Codes Listed below are the most common error codes that you might see on your Vaillant EcoTEC Pro boiler. Fault Code Possible Cause F.00 / F.0 Flow temperature sensor interruption F.01 / F.1 Return temperature sensor interruption F.10 Flow NTC short circuit F.11 Return NTC short circuit F.20 …

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Vaillant Boiler Error Codes (Status Codes)

Vaillant EcoTEC Pro / EcoTEC Plus Error Codes Listed below are the most common error codes that you might see on your Vaillant EcoTEC Plus boiler. Fault Code Possible Cause S.00 Heating mode error – no heat demand S.01 Heating mode fan start-up S.02 Heating mode error – water pump running S.03 Heating mode – …

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Vaillant Ecomax Pro 828E (Fault Codes)

Vaillant Ecomax Pro 828E Fault Code Possible Cause F.00, .04, .05, .10, .14, .15 All of these are NTC faults, and are best resolved by first changing all NTC to make diagnosis earlier. F.21 The pilot flame has failed. F.22 There is insufficient water in your system. F.11 A blockage in the appliance is preventing …

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Vaillant EcoMax Pro 18/28E (Fault Codes)

Vaillant EcoMax Pro 18/28E Fault Code Possible Cause F.1 Lack of gas, a fault with the ignition or flue – may need to adjust the gas valve or replace a defective electrode lead. F.4 Ignition fault. F.5 The system has suffered a fault due to overheating. F.6 Your flow NTC has developed a fault. F.17 …

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Vaillant Turbomax Plus 824/828E (Fault Codes)

Vaillant Turbomax Plus 824/828E Fault Code Possible Cause Meaning F.00 NTC Faults This means that your Flow NTC (Negative Temperature Coefficient Thermistor) cable is either defective or broken and needs to be replaced F.01 The Flow NTC (Negative Temperature Coefficient Thermistor) cable is either defective or broken and needs to be replaced F.10 — F.11 …

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