Medium
d.68 on Vaillant ecoFIT Pure 835

Your boiler is struggling to light the flame on its first try, which can lead to it failing to provide heating or hot water if it continues.

Book a service

This fault should be looked at by a Gas Safe engineer within the next week or two. It may get worse if left.

What the manual says

Manufacturer manual

Number of unsuccessful ignitions at 1st attempt

From this model's manual
Verified against the Vaillant Ecofit Pure 830 installation & service manual, page 31.
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

Ensure your gas supply is turned on at the meterCheck if other gas appliances in your home are working correctlyPress and hold the reset button for five seconds to see if the boiler clears the code

Find a Gas Safe engineer
Search the official register →

Avoid the next call-out bill

A cover plan would handle faults like d.68: no call-out fees, no surprise bills.

Approved partner
Domestic Appliance Guard
Unlimited call-outs, 24/7 helpline, no price-hike promise
Get a quote →

Affiliate links. We may earn a commission at no extra cost to you.

Related fault codes

Related guides you might find useful