In some ways, I’m grateful to Wyze for making this possible. Apparently, the fan on the furnace hadn’t been working properly for some time. That’s probably what shorted out the control board when the Wyze Thermostat tried to turn it on.
A couple of days’ discomfort is worth having a brand new system.
I think the Thermostat will work fine now. I’ll post an update after the new furnace is installed.