Partner Academy · Deye
Fault
F64
High Heatsink Temperature
Critical heatsink / IGBT over-temperature
Deye service: High Heatsink Temperature — cool down / fans / fins.
Field checks
- Allow the inverter to cool.
- Check cooling fans and clean heatsink fins.
FAQ
What does Deye F64 mean?
Critical heatsink / IGBT over-temperature
What should I check for Deye F64?
- Allow the inverter to cool.
- Check cooling fans and clean heatsink fins.
When should I contact Inversol?
After noting the exact code, model, SN, and operating mode, complete the field checks. If the code returns after a clean power cycle, contact Inversol WhatsApp support with a photo of the display.
Partner lookup — not a substitute for the official Deye service manual or live measurements. Firmware maps can differ by model family.