Alarm 57 or 67 — Three-strikes during a single-demand

What does Alarm 57 and/or 67 mean?

These alarms indicate that a 'three-strikes' condition has occurred during a single heating demand. This typically relates to the number of times a specific switch (like the combustion air inducer switch) has failed to meet its required state.

• Repeated failures of a component (e.g., switch) during a single heating cycle.
• Parameter 71 (MAX CAI NO SW OCC) may be set too low.
• Intermittent issues with the heating system components.

Click steps to track your progress.

1. 1

   Check the setting of Parameter 71 (MAX CAI NO SW OCC) for the number of allowed occurrences.

2. 2

   Investigate the component causing the repeated failures.

3. 3

   Ensure all heating system components are functioning reliably.

4. 4

   Consider adjusting Parameter 71 if appropriate and understood.