BoilerFaultCodes.com
E7 High Lockout

Your boiler is struggling to ignite or keep a flame going, causing it to shut down for a short safety cooling-down period.

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: Error during start-up or operation; followed by a 3 minute venting cycle

What causes this fault?

This fault occurs when the boiler's control system fails to detect a stable flame after several attempts to light the burner. The most common reasons are worn-out ignition parts that can no longer create a spark or a faulty sensor that cannot tell the boiler the gas has successfully lit.

Typical repair cost £120-350 (including labour)

DIY fix possible

Check that your gas stopcock is fully open.Verify if other gas appliances in your home, like a hob, are working.Try resetting the boiler by pressing the 'Reset' button for two seconds.

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 E7 — 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.

Remeha Avanta 18V 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