May 1, 2025

    We’ve collected a couple of days worth of data and the freeze up prevention is working!

If you click on the picture, a full size one will be downloaded. 

The Blue is the AC temperature just downstream from the evaporator coil, we’re calling this the AC supply temp. The Green is the cooling relay turning on and off.

You can see the freeze prevention working when the AC supply temp drops down to 39.5 °F, we command the thermostat to turn off, and violá - no freeze up.