BoilerFaultCodes.com
D.7 Low Information

Your boiler is displaying an information code to show that the pre-heated water feature for your taps is currently active.

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.

Technical description: Warm start temperature target value

What causes this fault?

This code appears when the 'Warm Start' feature is turned on, which keeps a small amount of water inside the boiler hot so it reaches your taps faster. It is not a fault, but rather a status message letting you know the unit is briefly firing up to maintain this internal heat. If you see this frequently, it simply means the boiler is keeping itself ready for your next hot shower.

Typical repair cost £0 (including labour)

DIY fix possible

Locate the 'Hot Water' dial or button on the control panelTurn the dial slightly clockwise to activate or counter-clockwise to deactivate the pre-heat (Warm Start) functionNo further action is required as this is a status indicator rather than a fault

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 D.7 — 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.

Related fault codes