82
Supply-air sensor not used / default parameters active (transient 90-second display, then stored in memory)
This code typically points to
- Supply-air sensor not installed or not wired
- Furnace running under default airflow/temperature parameters
Next checks to confirm
- Verify whether supply-air sensor is intended to be installed
- If sensor should be present, check wiring and sensor connection
- If sensor is intentionally not installed, code 82 is expected
Escalation
Advisory only — code displays for 90 seconds, then is stored in memory for later recall
Reset behavior
Clears from active display automatically after 90 seconds; remains in memory for service recall.
Informational
No action needed