e01
Loss of IRQ or other internal failures (Internal IFC error)
This code typically points to
- Internal IFC failure
- IRQ fault
Next checks to confirm
- Cycle power
- If fault persists, replace IFC
Escalation
Control fault — no normal heat sequence
Reset behavior
Active-alarm display clears only when condition clears. Last-6-fault memory cleared separately via L6F.
Urgent
Fix now