View visual findings from this job here - https://visionshare.xoi.io/?id=XA-A243-BD10463F055444D1A76ACFF902DFB7C1 Customer is getting error codes 126 and 33 at the Carrier Infiniti thermostat: At arrival, the furnace is on and running with no faults Going into the service history and check the last 10 previous events- Record all findings System is going through multiple Error 33 and 126 every day Confirmed that the air filter is clean and clear and there are no restrictions in the return ductwork Confirm that the damper is open on the supply ductwork Cycled the furnace on and off multiple times and confirm normal operation Call Carrier : Was on hold for over 30 minutes and left a message, but was unable To speak with anyone Carrier is going to have us put the system into an airflow verification test- Perform airflow verification test on site The error codes are pertaining to the furnace overheating: The air flow verification test failed Indicating the ductwork is undersized as the f