Runs 3 times a hour on average. Uses about 240 watts of power while running. Only runs for 1 minute each time. (55 seconds to just over a minute). Sense detected it as a Mystery Heater. Frequency of runtimes doesn’t seem to change throughout the day, but the gap between runs changes. Sometimes 10 minutes, sometimes as much as half an hour, but it maintains an average of 3 times an hour all day. All night.
If it is a motor, it has a very low startup current.
Gas Water Heater, the rest of appliances are all electric. The AC has a blower that runs for 10 minutes an hour…so not that either.