Verified boiler fault code

Biasi E13 Fault Code (BASICA COND)

Central-heating pressure high.

Safety disclaimer

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Fault code summary

Manufacturer
Biasi
Fault code
E13
Fault type
High pressure, Central heating
Severity
high
Reset
No unrestricted user reset is confirmed; high pressure should be assessed before restarting.
Applicable models
BASICA COND 24C, BASICA COND 28C, BASICA COND 32C

Quick answer

Central-heating pressure high.

What does this fault code mean?

Central-heating pressure high.

Common causes

  • High central-heating pressure

Symptoms

  • E13 shown on the LCD

What can the homeowner safely check?

  • Check the pressure reading and switch off the appliance using normal controls if it is abnormally high; do not drain it yourself.

Boiler reset information

No unrestricted user reset is confirmed; high pressure should be assessed before restarting.

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 assess system pressure, expansion vessel, filling arrangement and pressure relief.

Applicable boiler models

Related fault codes

Manufacturer documentation

Biasi BASICA COND user manual and installation instructions

SIGNAL DISPLAYED BY THE LCD: | E13+ | Central Heating pressure high |

Last verified

2026-09-12

Frequently asked questions

What does Biasi E13 mean?

Central-heating pressure high.

Can I reset a Biasi E13 fault?

No unrestricted user reset is confirmed; high pressure should be assessed before restarting.