Lennox Furnace Error Code DS1 Alternating Slow Flash / DS2 Alternating Slow Flash
Watchguard - burners failed to ignite; OR limit open more than 3 minutes; OR lost flame sense 5 times in one heating cycle; OR pressure switch opened 5 times in one heating cycle. (G32V-5 units)
SourceLennox G32V Series Furnace - Service ManualTable 21, Page 25
The full DS1 Alternating Slow Flash / DS2 Alternating Slow Flash procedure
Step 1 is visible so you can confirm you are on the right page. The remaining steps, the ones that tell you whether to actually replace a part, unlock with any pass.
SourceLennox G32V Series Furnace - Service ManualTable 21, Page 25
Or subscribe: $29/month for all codes plus Max diagnostics, with 70 Max messages a day. Plus applicable tax.
Where this code is documented
4 manuals in the MyPros+ library document this code for Lennox furnace.
Models covered by the manuals that document this code
75,000+ service documents · 20,000+ error codes · 100+ brands
Get Started$29/month · Cancel anytime · Or $9.95 3-day pass · Plus applicable tax