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FA 306Severity: High

Worcester Bosch FA 306: False flame detected

Also shown as:FA306
Quick answer

On Worcester Bosch boilers, fault code FA 306 means: False flame detected. Do not keep resetting or using the boiler. Switch it off and call a qualified gas engineer. If you smell gas, leave the building and call the gas emergency number.

Smell gas? Don't use switches or flames, open windows, close the gas valve, leave the building and call your gas emergency number. Never open the boiler casing yourself.

Can I keep using the boiler?

Severity: High

Do not keep resetting or using the boiler. Switch it off and call a qualified gas engineer. If you smell gas, leave the building and call the gas emergency number.

Common causes

  • Faulty or dirty ignition / flame sensing electrode
  • Faulty gas valve
  • Faulty control or motor board

How to fix it

  1. Have a qualified gas engineer inspect the boiler; never open gas or flue parts yourself
  2. If you smell gas: don't use switches, open windows, close the gas valve and call the gas emergency line

Frequently asked questions

What does Worcester Bosch error FA 306 mean?

On Worcester Bosch boilers, fault code FA 306 means: False flame detected.

How do I fix Worcester Bosch error FA 306?

Start with these steps: Have a qualified gas engineer inspect the boiler; never open gas or flue parts yourself; If you smell gas: don't use switches, open windows, close the gas valve and call the gas emergency line.

Is it safe to use the boiler with fault FA 306?

Severity: High. Do not keep resetting or using the boiler. Switch it off and call a qualified gas engineer. If you smell gas, leave the building and call the gas emergency number.

Worcester Bosch boiler fault codes

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