Arrived to home and both units were working, the homeowner said that they were not blowing heat for a period of time. I tried to recreate the units doing anything and turned them off via the stat and back on and the breakers. Also forced a defrost to see if the board was working, I couldn’t get them to fail. I explained to homeowner that I believe they were just going through defrost and when we get down in the 30s that this is pretty common. I suggested just to keep an eye and when it warms up they won’t notice it going through these cycles. I have over a 30 degree TD on both units.