Check Your Air Conditioner for Signs of Trouble
admin • March 13, 2017

A man is working on an air conditioner outside of a brick building.Winters tend to be very mild here in Southern California, even wet ones like this year. And warm temperatures come sooner and sooner every year. Even though it won’t officially be spring for another week, you’re probably using your air conditioning system already to help keep your home comfortable, and that AC use is only going to increase in the next few weeks and months.

If your air conditioner shows signs of trouble, now is the right time to deal with it: when the weather is still relatively cool and you can set up a repair session without triple digit temperatures turning your home into an oven. A formal diagnosis of any problem requires a trained technician, and layman should never attempt repairs on their own under any circumstances. (Proper licensing is required and the presence of dangerous components such as refrigerant means that formal training is an absolute necessity.) Having said that, most homeowners can spot the basic signs that something is wrong, and call in a repair service to get the issue looked at.

Generally speaking, anything out of the ordinary should be a cause for a concern. Most of us become accustomed to our air conditioner’s normal function, which makes it very easy to spot signs of trouble when they appear. More specifically, keep an eye out for these common signs, which recur over a wide variety of issues.

  • Strange noises. Anything from whistles to hums to bangs and shudders. Anything that makes a noise you don’t recognize as normal should be cause for concern.
  • Low air flow. Air out of the vents should have a uniform flow. If it slows down, it usually means that there’s either something blocking the flow of air, or there’s a problem with the fan motor (or the fan itself). It the low air flow affects only one vent, it’s likely a problem with the ducts. If it affects all of them, the problem is likely with the air conditioner itself.
  • Reduced cooling power. Obviously, you’ll know there’s a problem if the air conditioner blows hot air. But it’s also problematic if the air is cool, but less cool than you’d expect. This can come from something simple, like low refrigerant, or something more serious, like an overheating component.
  • Higher bills. Sometimes, the issue isn’t large enough to actively alter the functioning of the system, but it can wear on one or more of the components. This reduces the system’s effectiveness and forces it to work harder to do the same job. You’ll notice this in unexpectedly high bills, which will come despite the fact that you don’t believe you used the air conditioner more than you normally do.

When you spot these symptoms, don’t attempt anything further. Instead, turn it off – even if it’s a warm day – and call in a repair service. Doing otherwise runs the risk of more damage and possibly turning a minor repair job into a major one.

Once the air conditioner is turned off, contact Greenleaf Heating & Cooling. We provide air conditioning repair services throughout the Whittier, CA area !

Outside view of heat pump and central air conditioning system for residential home cooling.
By Cam La March 31, 2026
Compare heat pumps vs. central AC for Southern California homes. Learn which system offers better efficiency, comfort, and long-term value.
GreenLeaf HVAC heat pump installed outside California home for energy-efficient heating and cooling.
By Cam La February 26, 2026
Are high-efficiency HVAC systems worth it in California? Learn how energy savings, rebates, and improved air quality can lower costs and boost home comfort.
Homeowner adjusting a thermostat to lower winter energy bills for heating in Southern California.
By Cam La January 23, 2026
Want lower winter energy bills? Heating your home doesn’t have to be expensive. Use these simple tips and schedule HVAC maintenance with GreenLeaf Heating & Cooling today.
Cozy living room with yellow wall and Christmas Tree representing holiday HVAC maintenance needs.
By Cam La December 29, 2025
Hosting this season? Holiday HVAC maintenance in Whittier helps keep your heating efficient, improve air quality, and avoid breakdowns.
GreenLeaf technician replacing a dirty furnace filter in a Whittier California home during winter.
By Cam La November 25, 2025
Clogged filters raise allergens and strain your furnace. Learn why filter replacement in Whittier CA keeps your home warm and your system running safely.
Technician performing fall furnace tune-up while homeowner checks smart thermostat in Whittier, CA.
By Cam La October 28, 2025
Save energy this fall: schedule a tune-up, change filters monthly, upgrade to a smart thermostat, and seal/insulate ducts to keep heat in and bills down in Whittier.
Show More