Verified boiler fault code
Keston 62 Fault Code (Heat 2)
Fan-speed minimum/maximum supervision error during operation; restart condition.
Safety disclaimer
Fault code summary
- Manufacturer
- Keston
- Fault code
- 62
- Fault type
- Fan
- Severity
- warning
- Reset
- The Heat 2 fault screen shows a Press Reset prompt; do not repeatedly reset an unresolved fault.
- Applicable models
- Keston Heat 2 45, Keston Heat 2 55, Keston Heat 2 45P, Keston Heat 2 55P
Quick answer
Fan-speed minimum/maximum supervision error during operation; restart condition.
What does this fault code mean?
Fan-speed minimum/maximum supervision error during operation; restart condition.
Common causes
- Fan speed outside minimum/maximum supervision during operation.
Symptoms
- The boiler fault screen shows code 62 and may restart.
What can the homeowner safely check?
- Record the code and do not remove the casing.
Boiler reset information
The Heat 2 fault screen shows a Press Reset prompt; do not repeatedly reset an unresolved fault.
When should I call an engineer?
Contact a suitably qualified heating engineer when the fault persists, the boiler locks out, or the manufacturer instructions do not resolve it. For gas appliance work in the UK, use a Gas Safe registered engineer.
Engineer diagnosis
- Check fan speed feedback, wiring and the flue system.
Applicable boiler models
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Manufacturer documentation
Keston Heat 2 Installation & Servicing ManualFAULT FINDING MENU: Error min/max supervision fan speed during operation (restart) — code 62.
Last verified
2026-09-12
Frequently asked questions
What does Keston 62 mean?
Fan-speed minimum/maximum supervision error during operation; restart condition.
Can I reset a Keston 62 fault?
The Heat 2 fault screen shows a Press Reset prompt; do not repeatedly reset an unresolved fault.