What It Means
- Pump down mode.
Lennox Split & Multi-Split
Lennox Error Code Pd
Split & Multi-Split: Air conditioner (outdoor)
Causes & actions from Lennox
How it shows
- Outdoor control 7-segment display: Pd
Control must be IDLE. Place jumper across both pump down pins to activate; remove jumper to deactivate.
Applicable models & manual sources
- SL28XCV
Pump down mode.
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.
