Thanks, SteveO! It happened again!

These elevators are fairly new, about 6 or 7 years old. We've had them on service about two years, I think.

My associate thinks the oil is too cold. Because after running it for several runs, it then started stopping correctly. It has an oil cooler, and so he changed the thermostat setting today.

We had this problem a year ago, and when I reccomended a tank heater to the customer, he remarked that the two adjacent units had no problems, so why would this unit need one?

Interesting to note, that on the thrid unit in the same machine room, the OEM removed their own Hydro-Morris valve, and replaced it with a Maxton. That's very telling, when they change out their own installed brand of valve, for a Maxton.

Anyway, and ideas are sincerely appreciated!