What It Means
- Error on IPM Heat Sink sensor of inverter 1 (Short or Open)
Lennox Split & Multi-Split
Lennox Error Code E474
Split & Multi-Split: Mini-split unit (outdoor)
Causes & actions from Lennox
How it shows
- mini outdoor inverter pcb: E474
- Mini-split outdoor main board: E474
Check Outdoor Inverter PBA.
Applicable models & manual sources
- 3WPD036S6S-1P
Error on IPM Heat Sink sensor of inverter 1 (Short or Open)
Disclaimer: This information is for general reference. Code wording and instructions vary by model. Always follow the service manual for your exact unit.
What should you check next?
Continue in ACLogics with guided diagnosis for your equipment and symptoms.
