12-3-25 No heat call the back counter area is cold and this is unit #6 on the roof. Lennox I did speak to Dr. Smith Model# GCS16-048-120-6Y Serial # 5606A18530 Found of ignition board flashing three times telling me inducer motor pressure switch or rollout safety I checked the rollout safety, reset the system inducer motor started pressure switch did close. Didn’t find any problem with the system. We’ve had some pretty bad snow storms with high winds. There is a potential for the inducer motor exhaust getting clogged up and then tripping that safety. Cycled the unit about three times I’m also cycled the other two rooftop units for their space. All three systems are working at this time.