What It Means
- 5-minute anti-short cycle delay
Lennox Split & Multi-Split
Lennox Error Code Alternating SLOW Flash
Split & Multi-Split:
Causes & actions from Lennox
How it shows
- defrost control ds2 ds1 led: Alternating SLOW Flash (ds1: flashing (slow), ds2: flashing (slow))
- defrost control ds2 ds1 led: Alternating SLOW Flash (ds1: flashing (slow), ds2: flashing (slow))
Initial power up, safety trip, end of room thermostat demand. None required (jumper TEST pins to override)
Other manual wording
XP19
None required (Jumper TEST pins to override)
Applicable models & manual sources
- EL16XP1
5-minute anti-short cycle delay
- ML16XP1
5-minute anti-short cycle delay
- XP19
5−minute anti−short cycle delay
- XP19
5−minute anti−short cycle delay
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?
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