How to Troubleshoot a Rooftop Unit Short Cycling After a Filter Change

A small office called after an RTU started short cycling the day after maintenance changed filters. The thermostat was blamed first, but the timing was suspicious. The unit would start, run for a few minutes, hit a limit, and shut down before the space temperature moved much. I checked airflow before touching controls. The filters were the right size but a higher MERV rating than the blower…