F.74 boiler fault code

What F.74 means

Fault: Electrical problem in the water pressure sensor. Since the code table is used for various products, some codes may not be visible for the product in question.

Gas Safe engineer: The code remains or returns after the step above, or no home step applies; arrange diagnosis by a Gas Safe registered engineer.

A boiler fault code alone is not a gas or carbon-monoxide emergency. If you smell gas, a CO alarm sounds, or someone has possible carbon-monoxide symptoms, leave and call 0800 111 999 from outside.