Vokèra A06 Fault Code (Vision C)

Safety disclaimer

Fault code summary

Manufacturer

Vokèra

Fault code

A06

Fault type

Temperature sensor, Hot water

Severity

temporary

Reset

Not specified

Applicable models

Vision Combi 25 C, Vision Combi 30 C

Quick answer

Domestic-hot-water thermistor fault.

What does this fault code mean?

Domestic-hot-water thermistor fault.

Common causes

• DHW thermistor fault.

Symptoms

• Vision C displays A06 as a temporary alarm.

What can the homeowner safely check?

• Record the code and contact the installer if it persists.

Boiler reset information

Reset information was not provided in the verified manufacturer source. 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

• Test the DHW thermistor and wiring.

Applicable boiler models

• Vision Combi 25 C
• Vision Combi 30 C

Related fault codes

• A01 — Vision C

  Ignition failure, flame not sensed, or internal fault.

  Read fault code
• A02 — Vision C

  Limit thermostat fault.

  Read fault code
• A03 — Vision C

  Fan tachometer signal fault.

  Read fault code
• A04 — Vision C

  Insufficient system water pressure.

  Read fault code
• A07 — Vision C

  Primary-flow thermistor fault, overtemperature or temperature differential condition.

  Read fault code
• A08 — Vision C

  Return thermistor fault, overtemperature or inverted temperature differential.

  Read fault code
• A09 — Vision C

  Flue thermistor or flue-thermistor counter fault, or flue thermistor overtemperature.

  Read fault code
• A77 — Vision C

  Low-temperature thermostat fault.

  Read fault code

Manufacturer documentation

FAULT CODES — A06: DHW thermistor fault; Temporary; Check DHW thermistor.

Last verified

2026-09-12

Frequently asked questions