Verified boiler fault code
Biasi E52 Fault Code (BASICA COND)
Maximum number of remote unlock attempts reached.
Safety disclaimer
Fault code summary
- Manufacturer
- Biasi
- Fault code
- E52
- Fault type
- Communication, Safety lockout
- Severity
- high
- Reset
- The code indicates a reset limitation in the Biasi LCD table; follow the manufacturer's service instruction rather than repeatedly resetting.
- Applicable models
- BASICA COND 24C, BASICA COND 28C, BASICA COND 32C
Quick answer
Maximum number of remote unlock attempts reached.
What does this fault code mean?
Maximum number of remote unlock attempts reached.
Common causes
- Maximum number of remote unlock attempts reached
Symptoms
- E52 shown on the LCD
What can the homeowner safely check?
- Record the code and contact a qualified service provider if it persists; do not repeatedly attempt resets.
Boiler reset information
The code indicates a reset limitation in the Biasi LCD table; follow the manufacturer's service instruction rather than repeatedly resetting.
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
- A qualified engineer should review the fault history, remote-control communication and reset lockout.
Applicable boiler models
Related fault codes
- E01 — BASICA COND
Safety lockout due to failed ignition.
Read fault code - E02 — BASICA COND
Lockout due to the safety thermostat.
Read fault code - E03 — BASICA COND
EEPROM error.
Read fault code - E04 — BASICA COND
Pump circulation failure or insufficient system pressure.
Read fault code - E05 — BASICA COND
Fan-control anomaly.
Read fault code - E06 — BASICA COND
Heating NTC probe failure.
Read fault code - E07 — BASICA COND
DHW NTC probe failure.
Read fault code - E08 — BASICA COND
External NTC probe failure.
Read fault code
Manufacturer documentation
Biasi BASICA COND user manual and installation instructionsSIGNAL DISPLAYED BY THE LCD: | E52+ | Maximum number of remote unlock attempts |
Last verified
2026-09-12
Frequently asked questions
What does Biasi E52 mean?
Maximum number of remote unlock attempts reached.
Can I reset a Biasi E52 fault?
The code indicates a reset limitation in the Biasi LCD table; follow the manufacturer's service instruction rather than repeatedly resetting.