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Colchester's Heating & Plumbing Experts
Over a decade of quality heating & plumbing services.
Providing heating & plumbing services of the highest quality for over a decade across Colchester.
Ideal Boiler Fault Codes
Colchester’s Local Heating & Plumbing Experts
At Koziwarm, we understand how frustrating it can be when your Ideal boiler fault codes. But don't worry – we're here to help you quickly and effectively identify the problem.
Take a look at our guide below to learn about the common Ideal boiler fault codes and their meanings.
Ideal Boiler Fault Codes
Take a look at some of the most common Ideal boiler fault codes below.
F1: | Low water pressure |
F2: | Flame loss |
F3: | Fan fault |
F4: | Flow thermistor fault |
F5: | Return thermistor fault |
L2: | Ignition lockout (no flame detected) |
L5: | Restart lockout (boiler needs reset) |
Still unsure? Contact our team today for fast boiler repairs.


Frequently Asked Questions (FAQ's)
If you have any questions that aren't covered here, don't hesitate to contact our friendly engineers. You can give us a call at 01206 826 903 or drop an email to our team at [email protected].