Verified boiler fault code
Alpha 08 Fault Code (Evoke 28 and 33)
Maximum number of resets reached (five).
Safety disclaimer
Fault code summary
- Manufacturer
- Alpha
- Fault code
- 08
- Fault type
- Safety lockout, Other manufacturer-specific faults
- Severity
- high
- Reset
- The Alpha manual says the fault history can be cleared by turning the boiler off and on; if it does not clear, it directs the engineer to replace the PCB. Do not repeatedly reset an unresolved fault.
- Applicable models
- Evoke 28, Evoke 33
Quick answer
Maximum number of resets reached (five).
What does this fault code mean?
Maximum number of resets reached (five).
Common causes
- Maximum number of resets reached.
Symptoms
- The boiler may remain in a fault condition after repeated resets.
What can the homeowner safely check?
This information was not provided in the verified manufacturer source.
Boiler reset information
The Alpha manual says the fault history can be cleared by turning the boiler off and on; if it does not clear, it directs the engineer to replace the PCB. 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
- Review fault history and investigate the underlying repeated fault; PCB replacement is an engineer task.
Applicable boiler models
Related fault codes
- 01 — Evoke 28 and 33
Ignition failure; flame not detected during the ignition sequence.
Read fault code - 02 — Evoke 28 and 33
Overheat boiler lockout.
Read fault code - 03 — Evoke 28 and 33
High flue temperature.
Read fault code - 04 — Evoke 28 and 33
Gas-valve electrical connection fault.
Read fault code - 05 — Evoke 28 and 33
CH flow sensor fault.
Read fault code - 06 — Evoke 28 and 33
DHW sensor fault.
Read fault code - 10 — Evoke 28 and 33
Primary system pressure low.
Read fault code - 16 — Evoke 28 and 33
Fan fault.
Read fault code
Manufacturer documentation
Alpha Evoke installation and servicing instructions08 | Max. number of resets | Maximum number of resets reached (5) | Refer to fault history codes ... to reset by turning the boiler off and on. If it will not clear replace PCB
Last verified
2026-09-12
Frequently asked questions
What does Alpha 08 mean?
Maximum number of resets reached (five).
Can I reset a Alpha 08 fault?
The Alpha manual says the fault history can be cleared by turning the boiler off and on; if it does not clear, it directs the engineer to replace the PCB. Do not repeatedly reset an unresolved fault.