Back in June I installed a new Carrier Heat pump (25hnb924A003 -- 2 ton 2-speed 19 seer).
It worked quite nicely throughout the summer. In September, with the pleasant weather here (Maryland)
I shut off heating and cooling.
Two days ago my hvac company came out for the fall maintenance. Turning on the heat pump revealed -- no heat!
Fan coil pushes air, and the compressor seems to run (i.e.; cooling fan spins).
The maintenance guy checks pressure levels, listens to a clicking noise from the compressor, and deduces that the scroll motor is malfunctioning. Which means it needs to be replaced.
It is well under warranty, and I don't need heating or cooling for another month, so this is not a short-term problem.
But why would this happen? I don't push the system much (most of the time it was running in dehumidify mode, and the house is only 1300sq feet). Even if I was pushing the system --3 months?
So did I just get unlucky? The only weird thing I might of done is turning on heat mode accidentally, and then
turning it off right away. But I can't imagine that (with all the delays the Infinity 'stat has built into it) would cause any
kind of problems.