If things go wrong with your cooling system, how much air conditioning troubleshooting should you attempt yourself? Where’s the tipping point when it comes to when to call in a qualified professional, instead? The fact is, technology incorporated in today’s central air conditioners is complex and beyond the expertise of the average homeowner. For this reason—as well as valid safety concerns and warranty restrictions, too—the list of DIY air conditioner troubleshooting is necessarily short.
Nevertheless, a few basic steps will at least eliminate obvious issues and narrow down the causes.
Air Conditioning Troubleshooting Tips Before You Call a Professional
A/C doesn’t start at all. First check the thermostat and make sure the system’s in “Cooling” mode. Also verify that the desired temperature setting is at least 5 degrees below the displayed room temperature. If everything appears correct, look inside the main electrical panel for any tripped circuit breakers. If you notice one, don’t reset it. Call a qualified HVAC contractor and inform them.
System runs but poor cooling performance, low airflow, etc. Inspect the system air filter. Does it appear dusty and dirty? Remove the filter and take it to a home center to buy a replacement. Install the new filter and check the airflow. Also, make sure nothing’s obstructing vents on the outdoor half of the A/C system: fallen leaves or objects someone placed on top of the fan grille can be the problem, as can encroaching weeds or other vegetation that obstructs side air vents. If the problem persists, you need professional help.
Leaking water. If you notice water around the indoor air handler, check the wide condensate drain pan situated underneath. Is standing water inside the pan? Overflow caused by a clogged condensate drain line is likely and will require a qualified HVAC technician to clear the clog. Another possible cause of leakage is ice forming on the evaporator coil inside the air handler. This is usually the result of a very dirty coil or low refrigerant level—both requiring professional service to diagnose and resolve.
If basic air conditioner troubleshooting hasn’t solved your cooling problems, contact a professional at Apollo Home Heating, Cooling, Electrical and Plumbing.
"Ernie & Mike did a superb job on my new furnace and A/C installation. Despite having more than a day’s work to do, they came in and stayed until the job was done. They were organized, efficient, and protected the rest of the house well. Got both furnace and A/C installed the same day. Ernie was courteous, informative, and clearly knew his job better than anyone I’ve encountered before. The units look so good guests now get The Tour of our new system. Apollo is clearly not a fly-by-night company. I would recommend them to anyone in need of a new furnace and/or A/C."
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"We scheduled an estimate AND a tune-up. We knew something was wrong with our furnace, but hoped we could make it through the rest of the season. Upon telling Bill what our furnace was doing, he warned us immediately what the possible outcome was going to be; a cracked heat exchanger. He watched the flames roll backward, tested carbon monoxide levels, which were so high they meter’s last reading was 5,600 before saying “high”. He immediately shut it down, tagged it, and explained that with levels that high and children in our home he wanted off right away. He continued his inspection and showed us via a camera that not only was it cracked in multiple places, but had holes all over it. He gave us a few options for repairing it; his knowledge as well as genuine concern was beneficial and refreshing. Luckily we also scheduled an estimator, Micah, to come too and we were able to get costs between repairing and replacing (with several options). We decided to replace with a much higher efficiency furnace and one sized properly to our home. Hands down, not only did they both provide us great service and knowledge, but without sounding dramatic, they may have saved our lives. This was our first time calling Apollo, but it won’t be our last."
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