BoilerFaultCodesWhat the manual says
Manufacturer manualWarm 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.
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
Avoid the next call-out bill
A cover plan would handle faults like D.7: no call-out fees, no surprise bills.
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Related fault codes
All 135 fault codes on the ecoTEC pro 24
Seeing a different code? Every code this model can display, in one place.