What does E3 mean on my Honeywell TP30?
- EEarl BerrySep 14, 2025
If E3 appears, check if the ambient temperature is below 89.6°F (32°C). If it's above 89.6°F (32°C), place the unit below 86°F (30°C) for 2 hours before running it again. If E3 reappears after 2 hours, please contact the service center.