What does 239 mean?

During the burner ignition attempt, there is insufficient flame formation (ionization current). This can prevent the boiler from starting.

• Low dynamic gas pressure
• Damaged or worn ignition device
• Incorrect gas/air ratio
• Faulty monitoring electrode or its connections

Click steps to track your progress.

1. 1

   Check the dynamic gas pressure at the burner.

2. 2

   Inspect the ignition device for any damage or wear; replace if necessary.

3. 3

   Check the gas/air ratio and adjust if required, typically done by a technician.