BoilerFaultCodes.com
07 High Lockout

Your boiler has shut down completely because it reached the maximum number of failed attempts to fix an underlying problem.

Call an engineer soon

Book a Gas Safe engineer within 24–48 hours. Your boiler may be unsafe or could break down completely if left.

Technical description: Final fault code (Refer to section 7.11)

What causes this fault?

This fault occurs when the boiler's internal computer has tried multiple times to resolve a previous error but has failed to do so safely. It acts as a safety shutdown to prevent damage, usually triggered by a persistent issue with the ignition process or the fuel delivery system. Because the boiler cannot confirm it is firing correctly after several attempts, it enters a hard lock to protect the household.

Typical repair cost £100-350 (including labour)

DIY fix possible

Turn the mode selector switch to 'OFF/RESET' for 5 secondsTurn the dial back to the 'Hot Water' or 'Heating' positionMonitor the display to see if a different fault code (like 01 or 03) appears immediately after resetting

Find a Gas Safe engineer

Search the official register for a qualified engineer in your area.

Gas Safe Register →

Protect yourself from future repair bills

A boiler cover plan would cover faults like 07 — no call-out fees, no surprises.

Top rated
OpenFix
Boiler & heating care plans
Get a quote →
Hometree
from £12.95/month
Get a quote →
HomeServe
from £8.00/month
Get a quote →

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

Vokera Linea HE is discontinued — time for a new one?

Parts for discontinued models can be hard to find and expensive. A new A-rated boiler could save you money on both repairs and energy bills.

UK's #1 online installer
Boxt
Fixed-price online quotes. Next-day installation.
Get a free quote →
Heatable
Instant online boiler quotes from £1,499.
Get a free quote →
iHeat
Fast installation. Price match guarantee.
Get a free quote →

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

Related fault codes