Originally Posted by
Bruce Ramsey
Lennox heat pump manufactured 84. Temps at time of inspection around 30-35 but no partciptation (precipitation?) for a couple of days. There was a layer of ice, not frost, cascading out of the bottom of the unit. Looked inside the unit and probably 1 inch deep of ice, not frost, inside across the bottom.
Fan was spinning when I walked up and began my inspection. Spent a minute or two pulling the cover off the nearby disconnect panel. Fan stops spinning. Hear a low noise like the motor is trying but can't turn. Step over and smell electrical burning motor smell. See little wisps of smoke rising. Flip the breaker at the disconnect for the unit. Wait a minute and turn breaker back on. Noise stops, smell stops.
Inside the house was warm 68-70. As completed inspection heard the unit cycle on and off several times so "it got better".
At age 25, the unit is near or past its useful life expectancy. The ductwork is full of holes, tears, sags, gaps, failed connections, etc so a Repair/Replace Item in the report but I would like to know the hows and whys
What are the possible and probable causes of the 1 inch layer of ice inside and cascading out the unit?