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2019 Lennox Air Conditioner Repair2019-05-21T11:01:46-04:00

Lennox Air Conditioner Repair Guide 2019

(Updated for 2019)

Our handy Lennox air conditioner repair guide will teach you about troubleshooting, common issues, replacing your air filter, and more.

Please note, the following is for informational purposes only. Any servicing you attempt is at your own risk.

Lennox, At a Glance

Dave Lennox took the first steps of the company in 1895 when he built the first riveted-steel furnace. In 1952, Lennox expanded into the air conditioning market. Eventually, the company becomes international, offering a wide range of heating and cooling solutions for both homeowners and commercial ventures. They value integrity, respect and excellence, all of which makes for reliable, high-performing HVAC solutions that consumers can trust.

However, even the best air conditioners require some maintenance to keep running at peak performance. There are a few things that you can do as a homeowner to improve the longevity of your Lennox air conditioner and avoid expensive repairs or a replacement. Taking care of your unit and inspecting it regularly means that you can catch cracks and other problems before they turn into a major issue. We outline a few of the ways that you can maintain your unit below.

How to Replace Your Lennox Air Filter

Replacing the filter is an important task because it means that your air conditioner can work as intended, without any unnecessary stress from trying to push air through dirt and debris. It’s a simple task as a homeowner and should be done every month or so depending on how frequently you use your unit.

  • Find your air filter. It can be in the furnace, the air conditioner or the return duct.
  • Turn off power to your unit before you remove the filter.
  • Take the filter out. From there, you can clean it or choose to replace it.
  • Replace the filter and take care to ensure that the arrows indicating airflow match up with how air is blowing through your system.
  • Put the panel back and close your unit. Turn the power on.

Other General A/C Maintenance Tips

As a homeowner, there are a few other maintenance tasks that you can do to make sure that your air conditioner stays in tip-top shape. You can follow the list below as part of a seasonal routine that will help you to stay clear of avoidable repairs. Be sure to turn off the power before attempting to open your unit.

1. Keep the area around your air conditioner clean

Sweep leaves and other vegetation away from your unit. Remove plants and other greenery that is growing within two feet of your unit so that airflow is not being blocked.

2. Straighten and clean the fins

You can clean the fins from the inside out by removing the outer cover and vacuuming or using a gentle spray to hose down dirt that may be trapped between the fins. Don’t use too much pressure or you may bend the delicate fins. To straighten the fins out, you can use a fin-straightening tool or a butter knife to shape them back into place.

3. Make sure your unit is level

Check that the pad that your unit rests on hasn’t tilted from the soil settling underneath. An uneven air conditioning unit places additional stress on the compressor and can cause it to fail early.

What’s Wrong With Your Lennox Air Conditioner?

Remember to turn your A/C completely off before opening it up to look around or attempt any fix.

Is your air conditioner...The problem might be your...What's wrong?How you can fix it
ThermostatDead batteries may be the cause, or the thermostat may be on the wrong setting.Replace the batteries and ensure that the thermostat is set to cool.
Circuit breakerThe breaker switch may be turned off.Flip the switch back to the “on” position.
Not blowing cold air?Air filterThe filter may not be effective if it is full of debris.Change or clean the air filter if you haven’t done so in a while.
Outside unitThe air conditioner unit may be unable to vent hot air out properly if there is debris in the way.Clear out vegetation and leaves from near your unit, ensuring that you have at least 2 feet of clear space around your A/C.
RefrigerantLeaking refrigerant means that your unit is less efficient and won’t cool well.Call an HVAC technician to address this problem.
InsulationInadequate insulation in the walls, windows or doors means that cool air can leak out while hot air gets trapped.Windows are common spots where air leaks out. Think about upgrading to insulating windows or use blackout curtains.
Dripping water?Condensate lineThe PVC pipe that exits your air conditioner may be blocked.Use compressed air to remove the blockage.
Drain lineIf the drain is clogged, water will end up overflowing from the drain pan and can get into internal parts and cause damage.Check the line and remove the clog before it causes more problems.
Making odd sounds?Blower motor or beltSqueaking sounds may mean that there’s an issue with the belt or blower motor.Applying lubricant can help the parts run better.
Fan bladesIf the sound is like a card stuck in a bicycle spoke, there may be something caught in the fan blades.Turn off power to your air conditioner and check if there is debris between the blades and carefully remove it.

When to Get a Technician for Lennox A/C Repairs

As a homeowner, there are a lot of quick and straightforward tasks that you can do to keep on top of your unit. Doing regular maintenance can save you an expensive repair in the future, but also keep your unit running efficiently, so your home stays cool. There are a few issues though that are best dealt with by an HVAC technician. If you’re experiencing any of the problems below with your A/C unit, then consider contacting a professional.

Frozen coils

Frozen coils can be an indication that something serious has gone wrong, and diagnosing the issue can be tricky since it can be a problem with the ducts, drain or other internal parts.

Clicking sounds

Clicking sounds when your air conditioner starts and stops means that there is a possible relay problem or that a part inside is starting to fail or has come loose.

Damaged compressor

A defective compressor is a major issue that stops air from flowing properly. Though it is usually not the compressor that causes this issue, if it is, it will take a professional to repair or replace it.

Leaking refrigerant

The refrigerant that is leaking will make your air conditioner less efficient and can stop it from having any cooling effect. The problem cannot be resolved by adding more refrigerant.

Who to Call For Lennox Air Conditioner Repairs

Finding a reliable and honest technician can be a chore and feel like an impossible task. It is hard to know where to start. You can check online reviews, of course, but there is likely to be some bias and may not be an accurate reflection of the company or technician.

If you need a helping hand, at, we have a list of local HVAC companies and professionals that meet our high standards. We judge according to strict and consistent measures to recommend professionals that we trust to carry out successful work. We want you to make an informed decision based on impartial standards that you can rely on since it’s a difficult job picking someone to come into your home and work on an expensive investment.

Lennox’s Warranty Coverage

Lennox offers warranties based on the model tier of your air conditioning unit, provided that you register your unit on time. There is also the possibility of having an extended warranty as well.

  • Dave Lennox Signature Collection Series: 10-year limited warranty on the compressor and a 10-year limited warranty on covered components.
  • Lennox Elite Series: 10-year limited warranty on the compressor and a 5-year limited warranty on covered components.
  • Lennox Merit Series: 5-year limited warranty on the compressor and a 5-year limited warranty on covered components.

➤ Protect your Lennox air conditioner:  Register and access your Lennox A/C warranty here

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