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What is the Vaillant boiler F.00 fault / error code?

2 Answers

Answered by BoilerOne

25th May 2019

BoilerOne answered the question "What is the Vaillant boiler F.00 fault / error code?"

A vaillant boiler with an error code F.00 relates to a faulty thermistor on the heating flow, we would test the thermistor itself and test the cables from the pcb also looking for any damaged cables or loose connections. BoilerOne recommend you consult a gas safe registered engineer to diagnose the problem.

Answered by Landlord & Homeowner Gas Services

9th February 2019

Landlord & Homeowner Gas Services answered the question "What is the Vaillant boiler F.00 fault / error code?"

Hi I’m Greg from Landlord & Homeowner Gas Services. The F.00 fault code on a Vaillant boiler is likely due to an open circuit in the flow sensor. The likely causes are the following: NTC defective NTC cable defective Defective plug connection on NTC Defective plug connection on electronics. Thanks Greg Landlord & Homeowner Gas Services

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