Air conditioning is a blissful addition to your home when it works and a real pain in the neck when it doesn’t. Knowing the most common AC problems can help you recognize when your unit is a problem so that you can call in the pros immediately.
Odd odors from your air conditioner should always be considered a red flag. Musty smells suggest poor drainage and can be prevented with professional cleaning of your ductwork or with regular system maintenance.
Warm Air
We all expect our air conditioning to cool our living spaces, but there are various reasons your AC might be blowing warm air instead. Some of these reasons, such as a thermostat issue or a dirty air filter, are easy to fix. Others, like clogged condenser or refrigerant leaks, require the help of an HVAC professional to resolve.
The simplest reason your air conditioner may be blowing warm air is that it’s unable to keep up with the cooling needs of your home due to size, room layout, and other factors. This can be solved by balancing your system or installing dampers to redistribute airflow.
When you turn on your AC, a rotten egg smell indicates the system needs cleaning or air conditioning repair. This is caused by birds or insects that have died inside the unit and are decaying and can be avoided with a thorough cleaning.
Temperature Changes
If your air conditioner switches off and on constantly, it can strain the unit and lead to more costly repairs over time. This problem is usually caused by a dirty air filter or an incorrectly set temperature setting, and it’s easy to fix.
You can recalibrate the thermostat or move it to a shadier location away from sunlight and other heat sources. Leaking ducts or vent blockage is another issue often fixed by moving furniture or decorative items away from the vents.
Low refrigerant levels can also cause an air conditioning system to switch on and off repeatedly. If this happens, check the breaker box and turn it back on to see if it has tripped. Then, contact a professional to inspect the system for leaks or other issues.
Strange Noises
When an air conditioner starts making strange noises, it’s time to call a professional. These sounds can indicate serious problems, including a faulty thermostat or compressor problem.
Squealing is a sign of high internal pressure, which could be dangerous. These noises usually occur when the AC first turns on and lasts 15 seconds. It’s best to turn off the unit and call an expert air conditioning services for a quick fix.
Banging noises can mean that something has come loose inside the unit. This can be dangerous, as it may cause the fan to break or cause damage to other parts of the unit.
Clicking sounds is another sign of trouble. These sound like metal scraping against metal and are often caused by the fan blades being out of balance. This can damage the fan and cause your system to use more energy during cooling cycles.
Water Leaks
Water leaks from air conditioning units can cause significant damage to homes if not addressed quickly. They can lead to soaked drywall, mold, mildew, and damage to framing components.
A clogged drain line is one of the most common causes of AC leaking. The drain line collects moisture from the evaporator coil and can get clogged with dirt, debris, or algae. The accumulated moisture will overflow the drain pan and leak into your home.
Another possible reason for a leaking air conditioner is that the drain pan or the drain line must be the right size or type for your unit. A visual inspection of the drain pan and the drain line can help determine the cause of the leaking.
Inconsistent Cooling
If you feel cool air in one room but hot air in another, your home’s HVAC system isn’t keeping up. This is a common problem; blocked vents, ducts, dirty air filters, and low refrigerant levels can cause it.
To fix this issue, ensure that furniture, toys, and other items do not block supply vents. You can also look for holes and tears in your ducts and seal these with foil-faced tape or mastic duct sealant.
If the ducts are in good shape, but your home’s layout means that certain rooms will never receive equal cooling, consider a zoned system or mini-split installation. This will allow you to control temperatures more accurately and save on energy costs.
