Google Nest Thermostat E74 Error Troubleshoot

Описание к видео Google Nest Thermostat E74 Error Troubleshoot

Google Nest Thermostat E74 Error is due to lost of power to the red wire. I will show you how to troubleshoot this problem. Mine turned out to be from a blown HVAC fuse. I will show you how to replace the HVAC fuse.
0:00 Intro
0:16 E74 Error
0:25 How dose the red wire work
1:14 Diagnosis 1: Tripped circuit breaker
1:22 Diagnosis 2: Red wire not connected correctly
1:43 Diagnosis 3: Condensation overflow at the drain pan
2:23 Diagnosis 4: Blown fuse at the HVAC control board
3:39 Confirm resolved problem at the thermostat

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