Emergency
F on Baxi Megaflo System 15 HE A

Your boiler has detected an issue with the gas flow or internal pressure tubing, resulting in a shutdown to keep your home safe.

Act immediately

Turn off your boiler and stop using gas appliances. Call a Gas Safe engineer now. This fault can be dangerous if ignored.

What the manual says

Manufacturer manual

Check and correct the connection of the tube between the venturi and gas valve / Gas at burner

From this model's manual
Verified against the Baxi/Baxi Bm Baxi Megaflo System 15 18 24 28 32 He A Range Installation Servicing Instructions Manual installation & service manual.
Plain-English guidance below. Severity, DIY steps, costs and parts are our interpretation to help you act, not text from the manual.

Engineer required

This is a emergency severity fault. Stop using the boiler and call a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.

Find a Gas Safe engineer
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Avoid the next call-out bill

A cover plan would handle faults like F: no call-out fees, no surprise bills.

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Related fault codes

All 16 fault codes on the Megaflo System 15 HE A

Seeing a different code? Every code this model can display, in one place.

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