Vaillant F Codes

Vaillant ecoTec exclusive Green iQ combi boiler error codes

Code Meaning Vaillant ecoTec exclusive Green iQ combi boiler error codes F.00 Interruption: Flow sensor NTC plug not plugged in or has come loose, multiple plug on the PCB not plugged in correctly, interruption in cable harness, NTC defective F.01 Interruption: Return sensor F.02 Interruption: DHW outlet sensor F.03 Interruption: Cylinder sensor F.10 Short circuit: …

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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 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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