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Fault symbol: pixel-style circle containing an exclamation mark
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Heating & air conditioning

Fault

Pixel-style circle containing an exclamation mark. · also called “F code”, “boiler error”, “error”, “exclamation”, “fault”

What it means on vaillant

Boiler fault

Replaces the normal display when the boiler has a fault, together with a fault code (F. and a number) and sometimes a plain-text message. If the fault cannot be cleared, contact a competent heating engineer; after an ignition fault (F.28 or F.29) check the gas valve is open and press reset, at most three times.

Source · Manufacturer manual Vaillant ecoTEC plus VU 446/5-5 and VU 606/5-5 boiler operating instructions · checked

Where it appears

Heating & air conditioning

Questions about the Fault symbol

What does the Fault symbol mean on the Vaillant ecoTEC plus VU 446/5-5 and VU 606/5-5 boiler (VU 446/5-5)?
Replaces the normal display when the boiler has a fault, together with a fault code (F. and a number) and sometimes a plain-text message. If the fault cannot be cleared, contact a competent heating engineer; after an ignition fault (F.28 or F.29) check the gas valve is open and press reset, at most three times.
What does the Fault symbol look like?
Pixel-style circle containing an exclamation mark. It is also called “F code”, “boiler error”, “error”, “exclamation” and “fault”.
Which products show the Fault symbol?
It is recorded on Vaillant ecoTEC plus VU 446/5-5 and VU 606/5-5 boiler (VU 446/5-5).

Checked against the source · · How we verify

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