E312
Restricted airflow in cooling or continuous fan mode is lower than CFM setting
This code typically points to
- Dirty filter
- Duct restriction
- Indoor blower in cutback mode
- Total external static outside design range
Next checks to confirm
- Check filter and duct system
- Correct restriction or add/repair duct
- Verify blower is not operating outside design parameters
Escalation
Warning only; indoor blower running at reduced CFM in cutback mode
Reset behavior
Cleared after current service demand is satisfied.
Service Soon
Schedule repair