BoilerFaultCodesFerroli F13 Fault Code
The Ferroli F13 fault code means: your boiler's internal temperature sensor has stopped sending the correct information to the control board, preventing the system from operating safely.. It appears on 13 Ferroli models in our database.
Technical description: Exchanger probe error – t-sensor damaged, short circuited, sensor damaged or wiring broken
What causes the Ferroli F13 fault?
This fault occurs when the sensor responsible for monitoring the heat exchanger's temperature fails to communicate with the main control board. The most common reason is that the sensor has physically degraded or developed a short circuit, meaning the boiler can no longer verify if it is operating at a safe temperature. In some cases, the error is caused by loose or damaged wiring connecting the sensor to the brain of the boiler.
Engineer required
This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.
Find a Gas Safe engineer
Search the official register for a qualified engineer in your area.
Gas Safe Register →Ferroli models that show the F13 fault code
Click a model for the full fault code list and model-specific repair notes.
- Arean Repair: £120-220
- Arena 30A Repair: £120-220
- BlueHelix Pro 25C Repair: £120-220
- BlueHelix Pro 32C Repair: £120-220
- Bluehelix Tech Repair: £120-220
- Domi Compact Repair: £120-200
- Domiproject Repair: £90-160
- Econcept 100 Repair: £150-250
- iBoiler 24 Repair: £90-160
- iBoiler 28 Repair: £90-160
- Modena HE Repair: £90-160
- Optima 201 Repair: £120-220
- Optimax Repair: £120-210
Source
Ferroli F13 fault code information on this page is sourced and cross-checked against the official Ferroli service / installation manuals for each affected model.
Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed 27 April 2026