Service agreements and tune-ups or “preventive maintenance,” as is required by most A/C equipment manufacturers to fulfill warranty obligations, too often is poorly done by servicing dealers. Frequently, more harm is done than good.
I recently read an article in a local HVACR magazine that somewhat addressed this problem, which I guess we all should have foreseen coming because R22 is getting very scarce and its price is skyrocketing.
Everyone knows when natural gas is not available (in many Northeast buildings, much of Florida and rural areas), the least-expensive form of heating is the heat pump.
However, among many people heat pumps have a terrible reputation for blowing cold air.