- On January 18, 2021
What You’ll Learn
As you read about the common causes of your A/C not blowing cold air, you’ll learn:
- There are several reasons your air conditioner could stop blowing cold air, some of which are difficult to diagnose.
- Expert HVAC contractors in Phoenix have the tools and experience required to diagnose each of the following issues quickly.
- The problem is not likely to go away on its own, which makes it important to take action as soon as possible.
“Why is my air conditioner not blowing cold air?” It’s one of the most common questions we receive, and there could be many reasons. Imagine this, you come home from a hot day spent playing golf, at the park with the kids, or running errands only to find that your house is hot, sticky, and humid. Not only is this heat inconvenient, but it’s also dangerous to your family, pets, and furnishings. With temperatures in Phoenix averaging around the 100-degree mark, a properly functioning A/C unit is the only way to keep your family safe and comfortable this summer season. Keep reading to learn about the common issues that can lead to a malfunctioning A/C unit, learn some simple fixes of your own, and the signs it’s time to call a professional.
One of the most common causes of an A/C malfunction is related to the connection between the unit and the power source. If you have recently experienced a power outage, your A/C unit might have been affected by a power surge. Be sure to check your electrical box to see if a breaker has been tripped. If this is the case, simply reset the breaker to turn the power back on to the unit. In many cases, this unit may have sustained extensive damage, which can be diagnosed and repaired by a qualified air technician.
If your unit is blowing warm air or no air, you may be experiencing issues with your thermostat. Many factors can cause a malfunctioning thermostat. The first step would be to double-check the temperature settings on the unit. If the temperature is set at an appropriate level, but the air is still warm, you can then try turning off your unit at the thermostat to resolve the problem.
The battery power of the unit can impact its effectiveness. Try changing the batteries in your thermostat and seeing how that affects the temperature. If the unit is wired and does not take batteries, check the circuit breaker, as it may have become disconnected in a power outage.
If your system is running but not producing air that is cool or the correct temperature, the disconnect may be caused by the calibration of the thermostat. The placement of the unit near a lamp, direct sunlight, or a drafty window can negatively affect its performance. The unit could have also been jostled out of place, leading to a misalignment of the mechanisms inside.
If you have double-checked the temperature settings, reset the thermostat, replaced the batteries, and tested the breaker. The issue persists, you should contact a professional from Howard Air who can easily diagnose the problem and get your thermostat functioning in no time!
Oftentimes, a blockage due to clogged air filters, a faulty vent, or a defective fan can generate an accumulation of ice on the unit. This coating of ice causes an evaporator coil to freeze up. The system will run continuously, overheating the unit and ultimately causing a failure. This can also cause severe damage, including water leaks that can potentially affect your interior furnishings. Ice build-ups can be a real hassle that can cause serious damage, so it’s best to let a professional service the unit.
Some newer AC units have sensors that will alert you to potential clogs before they become an issue. Unfortunately, most older units are not equipped with this technology, and a clog is only detectable by the presence of water in the drain pan. Early detection is key to minimizing damage, so be sure to check your drain pan with each filter change.
In the event of a clogged drain, you can attempt to unclog the superficial portion of the drain pipe. Before you attempt to clean any portion of your unit, be sure to turn off the power to the unit. Using a thin wire brush, you can remove visible debris from the drainpipe, although the clog will occur deeper inside the unit in many cases.
With interior clogs, a professional should definitely be contacted. Regular maintenance of the unit can prevent the drain pipe from clogging with debris.
You’ll know a condenser coil is dirty when you are experiencing a reduction in AC efficiency. Perhaps your home is cooling much slower than usual, or that it feels humid. In severe cases, the unit will produce hot air. Why is this happening? Dirty coils overwork the compressor, and with dirt accumulation, the temperature will increase in the home.
Over time, this dirt build-up can threaten the unit’s life, knocking years off the machine’s longevity. In the event of debris build up on the coils, a professional needs to be contacted immediately to service the unit. Luckily, clean coils stay functional for longer with regular maintenance from a trusted professional. The technicians at Howard Air will check your system during annual inspections so you can remain comfortable with the cleanliness of your unit.
Condensate Airflow Switch
If your unit drains improperly, it may need a condensate float switch or to have the float switch serviced. The float switch turns off the unit when the primary or secondary drain pan becomes clogged and full of water. Ideally, the switch will prevent the unit from running continuously, leaking, or experiencing build of algae, causing a disastrous, slimy mess. When there is an issue with the switch, it is always best to have a professional assess the situation. To prevent further issues, having a float switch installed coupled with regular maintenance can save you time, money, and aggravation.
Low Refrigerant Levels
Refrigerant is the chemical that powers the cooling system of the AC unit. Naturally, you’ll need regular levels of the solution in your machine to keep it operating throughout the hot summer months. Still, occasionally you’ll experience issues that may indicate it’s time to have a professional from Howard Air change the fluids.
If you notice any of the following, you may need to refresh the refrigerant:
- You have increased energy bills
- Experiencing warm air blowing from the machine
- Ice or frost on the AC unit
- A hissing or bubbling noise
Apart from changing the air filter, any of these signs are a good indication that you should call a professional immediately, as your refrigerant might need to be changed. Refrigerant is toxic! Leaks should be repaired immediately, and fluids should not be changed by anyone other than a qualified technician. Additionally, if the levels are low, having refrigerant “topped off” will only temporarily fix the issue. It is best to evacuate the remaining fluid and replace it with fresh solution.
A/C Service in Phoenix, AZ
As you can see, there are a number of reasons why your AC might not blow cold air. Simple tips like checking the breaker, resetting the thermostat, changing the air filter, and removing excess scum from the surface of the unit will sometimes solve the problem, but calling a professional will save you and your family hours of frustration. Luckily, the professionals at Howard Air have been here to help customers in Phoenix since 1977!
We have a team of qualified technicians who will be able to quickly assess and fix the issue with your unit. To prevent any issues with your unit, contact Howard Air to schedule your routine maintenance. From an emergency to a tune-up, don’t sweat it; Howard Air is there!
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