I purchased a Lennox air conditioner in May 2015. On May 1, 2018, the coil froze. United Heating, who sold me the unit, came out to diagnose the problem. It was determined my unit’s [evaporator coil] ...

Dear Greg: Two and a half years ago we moved into a new house with a new Lennox air conditioner. I’m glad I bought the extended warranty, or I’d be in a world of hurt. At least 16 things have gone ...