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Does anyone have any idea what this strange noise is in the linked video?
It happens after the heater has been on for a while, and it always seems to happen twice (a few seconds apart).
The HVAC technician I had contacted just got back to me right after I posted this. He says the noise is the compressor going into defrost mode, and it is an expected sound for the quality (builder-grade) of the unit I have.
Required, but never shown