What It Means
- Coil Sensor Problem
Lennox Split & Multi-Split
Lennox Error Code DS2 FAST Flash, DS1 FAST Flash (Alternating)
Split & Multi-Split: Heat pump (outdoor)
Causes & actions from Lennox
How it shows
- defrost control ds2 ds1 led: DS2 FAST Flash, DS1 FAST Flash (Alternating) (ds1: flashing (fast), ds2: flashing (fast))
Sensor being detected open or shorted or out of temperature range. Demand defrost control will not perform demand or time/temperature defrost operation. (System will still heat or cool.)
Applicable models & manual sources
- ML16KP2
Coil Sensor Problem
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.
