Low
d.68 on Vaillant Home System

Your boiler is struggling to fire up on the first try and is recording how many times it has failed to ignite.

Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed

Monitor it

This is a minor fault. Keep an eye on it and mention it at your next annual boiler service. Reset the boiler and see if it clears.

What the manual says

Manufacturer manual

Number of unsuccessful ignitions at 1st attempt: Current value

From this model's manual
Verified against the Vaillant Home System installation & service manual.
Plain-English guidance below. Severity, DIY steps, costs and parts are our interpretation to help you act, not text from the manual.

DIY fix possible

Monitor the boiler for any lockout codes like F.28 or F.29Check that other gas appliances in the home are working correctlyEnsure the condensate pipe has not frozen if the weather is very coldIf the boiler eventually fails to ignite, contact a Gas Safe engineer

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Related fault codes

F.28View →F.29View →d.69View →

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