BoilerFaultCodesWhat the manual says
Manufacturer manualFlow sensor error – t-sensor damaged, short circuited, sensor damaged or wiring broken
From this model's manual
Verified against the Ferroli Modena He installation & service manual, page 26.
What causes this fault?
This fault occurs when the boiler's internal computer loses communication with the sensor that monitors the temperature of the water being sent to your radiators. The most common reason is that the sensor has physically failed or developed an electrical short, though it can also be caused by loose or damaged wiring between the sensor and the main control board.
Engineer required
This is a high 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
Search the official register →
Boiler cover options
Avoid the next call-out bill
A cover plan would handle faults like F14: no call-out fees, no surprise bills.
Approved partner
Get a quote →
Domestic Appliance Guard
Unlimited call-outs, 24/7 helpline, no price-hike promise
Affiliate links. We may earn a commission at no extra cost to you.