A month ago, when the weather was quite even and not too hot or too cold, I woke up one morning and discovered that the house was measuring about 88 degrees. I went to the thermostat and pushed it lower, in the hopes that would make the a/c kick on as it is supposed to. Unfortunately, there was no luck. I called in the local heating and cooling company to see if they could come out for an HVAC service visit and determine what was going on with the a/c. They HVAC company was quite professional and very easy to deal with. The a/c service technician called while enroute to make sure we knew he was on his way. He was pleasant when he arrived and set about to do the a/c inspection straightaway. He was diligent while using his tools to open up the outdoor a/c unit and was careful not to drag dirt or grease when he came into the house. After inspecting the air vents, the ducts, and the compressor, he gave us the bad news. The HVAC system repairs would be extensive. He suggested that it might be a good idea to replace the HVAC rather than repair it, since the repair costs would be high. We decided we would need some time to think it over, and since the weather was so perfect, we did not hurry ourselves along. Now, though, it is getting quite cold at night, and I am in need of a heater than works well. The time has come to make a decision. Should we repair or replace the HVAC system?