Condensation on AC vents happens for the same reason a cold glass sweats on a summer day: humid air is touching a surface cold enough to pull moisture out of it. That’s straightforward physics, not necessarily a malfunction. The question is why your indoor humidity is high enough, or your vent cold enough, for it…
The best AC temperature for summer is 78°F (25.5°C) when you’re home and awake, according to the U.S. Department of Energy. Higher when you’re out, and adjusted to preference while sleeping. That number surprises people who keep their homes at 72°F. It’s worth knowing where it comes from and why the exact figure matters less…
Indoor air quality gets discussed mostly by companies selling something to fix it. That makes it hard to tell which problems are real, which solutions work, and which are expensive answers to questions nobody asked. Here’s the short version: the biggest improvements in most homes come from ventilation, humidity control and filtration, roughly in that…
A dirty evaporator coil is one of the most common reasons an air conditioner cools poorly, and one of the least likely to be noticed. Unlike the outdoor unit, which you walk past every day, the evaporator sits inside your air handler where nobody looks. The symptoms show up as weaker cooling, longer run times,…
AC short cycling is when your system turns on, runs briefly, shuts off, then starts again a few minutes later. Instead of steady cooling cycles of 15 to 20 minutes, you get a system that never settles. It matters more than most people realize. Compressors wear out from starting, not from running, so a system…
The seasonal energy efficiency ratio, almost always shortened to SEER, tells you how much cooling a system delivers per unit of electricity it consumes over a typical cooling season. Higher number, less electricity for the same cooling. A 20 SEER unit uses roughly half the power of a 10 SEER unit doing the same work….
An AC blowing hot air is different from an AC that cools weakly. Weak cooling usually means airflow or refrigerant problems. Actively hot air means something more specific: your indoor blower is running while the outdoor unit isn’t. Air is moving through your house, but nothing is removing heat from it. Often the air feels…
Your AC condensate drain line handles something most people never think about: the several gallons of water your air conditioner pulls out of the air on a humid day. That water has to go somewhere. The drain line is the PVC pipe that carries it from the indoor unit to a place outside, a floor…
AC condenser maintenance is the highest-value hour you’ll spend on your cooling system all year. The outdoor unit’s entire job is releasing heat, and it can’t do that through a season’s worth of dust, pollen and grass clippings packed into its fins. The work itself is straightforward: cut power, clear debris, rinse the coils from…