How to Know If Your A/C System is on Its Last Leg

June 8, 2017

How to Know If Your A/C System is on Its Last Leg

When your A/C system is on its last leg or in big-time repair trouble, you can feel it in your gut. However, you want some sort of clue, confirmation or evidence that it is indeed time to replace your A/C unit. If your A/C is exhibiting one or more of the following symptoms, it's time to start shopping for a replacement.

Your A/C Runs and Runs, But Can't Keep Up!

Sometimes an A/C unit that's on its last leg will run, run and run, yet still unable to keep up with your home's cooling load. Or, perhaps the indoor air handler turns off but the outdoor unit doesn't. Following are common reasons for continuous AC operation:

  • Electrical: A bad electrical part, such as a contactor, can keep your A/C running and wasting energy and blower life.
  • Refrigerant: Low refrigerant indicates a leak — a major part replacement — and won't keep up with your home's cooling load.
  • Ice buildup: Ice buildup on the evaporator effectively halts the cooling process, but your A/C will continue to run. Ice buildup is often caused by an electrical problem, low refrigerant or excessive dirt in the A/C.

Awful Strange Noises

Your A/C should make noise, but not the following awful strange noises:

  • Grinding: Grinding noises indicate a failing blower motor. Turn off your A/C and contact your HVAC technician.
  • Squealing: Squealing may also indicate a blower problem, but more often it indicates a loose blower assembly, which doesn't require A/C replacement.
  • Whirring: A whining, whirring and droning noise is indicative of a failing compressor — the heart of your A/C system. Start planning your A/C replacement.

It's Always Something

Your A/C system incorporates dozens of systems, functions and parts into one finely-tuned machine that keeps your home cool. As your A/C ages, however, many problems can arise. It may seem like repairs are never ending. At this point, retire your old A/C and invest in a new efficient A/C system that will keep your home cool for years.

Is is time for a new A/C? 

If you're suspicious your A/C system is on its last leg, contact us at Lozier Heating & Cooling today. Check out our guide to selecting the right A/C.