Field Notes
Notes from the field · Omaha, Nebraska
Contents
No. 02
Why is my AC coil freezing over?
July 2026
A frozen coil is a coil starving for heat — six causes, from a $20 filter to a refrigerant leak.
No. 01
Why is my furnace short-cycling?
July 2026
A furnace that starts, runs minutes, and quits is telling you something — six causes in the order they turn up.