The AC runs very short cycles

After my HVAC system in my house hit the ten year mark a few months ago, I started looking at options for new air conditioners.  I knew I wanted another standard refrigerant driven air conditioner, but was sure to request a system that is powered by anything but R-22, since it will be off the market entirely soon.  Even with these options, I had the choice between a system much like my previous one, or a much larger one. Because the manufacturer of the larger air conditioner was running a promotion on that particular system, the price was only slightly higher than the smaller air conditioner.  I thought that this decision was a no brainer. Obviously a larger system would cool faster and therefore run less, right? My HVAC supplier seemed to follow my logic and encouraged me to take the plunge. I have certainly noticed a drastic reduction in cycling times, and the air coming from my vents is noticeably colder.  But what I couldn’t put my finger on was why my house suddenly started to feel more humid than before the installation. This seemed like a blatant contradiction and completely opposing the other results I was getting from the larger unit, so I went out and bought a weather meter to make sure I wasn’t just imagining things. It turns out that my inclination was right, my humidity inside was much higher than it should be, barely resting below the dew point outside.  I immediately called the HVAC company that sold me the unit and installed it and they acted like they had no idea what was wrong and sent someone out. He barely ran a diagnostic before he gave up and insisted something was wrong with my house. Turns out, if you sell someone an air conditioner too big for their home, it will cycle much quicker to maintain the thermostat setting, leaving little time for your indoor air to pass over the evaporator coil and have the humidity pulled out.  I’m still considering my options, but it looks like a central dehumidifier might be my only solid solution.

HVAC maintenance