This begs the question, "what would happen if the SDM3065X fan were disabled"
Best,
Question has been posited few times, for several different DMM with fans..
I wouldn't recommend it, because they are not designed for stale air inside. In addition to reference, ADC and sensitive front end path, rest of the meter runs hot in comparison. Some parts (PSU for instance) might run too hot.
Also, without airflow, sensitive parts would develop larger and different thermal distribution patterns.
Few brave ones experimented and reported some improvements in low frequency noise and some shift in calibration.
Nobody did serious long term characterization of reliability, accelerated aging etc..
I spoke with some people from Keysight once, and info was that fan helps keep instrument more stable in wider temperature range and power on stabilization faster. Pretty much only downside is acoustic noise.