5 Signs Your AC Is About to Die (And How to Save It for $20)

A dying AC rarely quits without giving you any warning.

It may blow warmer air. Make strange noises. Struggle to move air through the house.

Catch those signs early and you may be able to solve a simple maintenance problem before you're dealing with a much more expensive repair or replacement.

5 Signs Your AC Is Failing

1. It's blowing warm air

If your AC is running but the air coming from the vents isn't getting cold, something is wrong.

A dirty filter, airflow problem, refrigerant issue, electrical problem, or mechanical failure can all cause poor cooling.

Don't immediately assume the compressor is dead. Start with the simple things you can safely check.

2. It's making weird noises

Your AC shouldn't suddenly start sounding like a construction site.

Grinding, squealing, rattling, or clanking noises can indicate that a component is worn, loose, or damaged.

A new noise is worth investigating, especially if the system is also struggling to cool the house.

3. The airflow is weak

Put your hand over a vent.

If the air coming out feels noticeably weaker than usual, check the easy stuff first.

A dirty air filter is one common cause. Blocked vents, duct problems, or issues with the indoor blower can also reduce airflow.

Replacing a dirty filter is a cheap first step before assuming you need an expensive repair.

4. The system keeps turning on and off

This is called short cycling.

Instead of running through a normal cooling cycle, the AC starts and stops repeatedly.

That can increase wear on the system and may be caused by problems ranging from a dirty filter or poor airflow to an incorrectly sized system or a mechanical issue.

If it keeps happening after you've checked the basic maintenance items, it's time to have it inspected.

5. You see ice on the unit

Ice or frost on the refrigerant lines or indoor evaporator coil isn't normal.

It can be associated with restricted airflow, a dirty filter, or refrigerant-related problems.

Don't keep running the system and hope the ice disappears. Turn the cooling off and allow the ice to thaw, then check the filter and airflow.

If the problem comes back, call a qualified HVAC technician.

The $20 Fix Worth Trying First

Before assuming your AC needs a major repair, check the basic maintenance items.

Start with the air filter

A dirty filter restricts airflow and makes the system work harder.

If yours is dirty, replace it with the correct size and type for your system.

The replacement cost is usually far less than an emergency service call.

Clean the outdoor condenser

Turn off power to the AC before cleaning the outdoor unit.

Remove leaves, grass, and other debris from around the condenser so air can move freely.

You can gently rinse the outdoor condenser coils with a garden hose. Avoid using a pressure washer because high-pressure water can damage the delicate fins.

Check for obvious obstructions

Make sure nothing is blocking the outdoor unit.

Overgrown grass, leaves, weeds, and stored items can restrict airflow around the condenser.

Give the unit some breathing room.

Don't improvise with the fins

Bent condenser fins can reduce airflow through the unit.

A proper fin comb can be used for minor damage if you know how to use it safely. Don't use a knife or other improvised tool around the fins.

If they're badly damaged, leave them alone and have the unit inspected.

These basic maintenance steps won't fix every AC problem. But they can eliminate some simple causes before you spend money on a service call.

When to Call a Pro Instead

Some AC problems aren't DIY maintenance jobs.

Call a qualified HVAC professional if:

• You smell burning or see sparks.

• The system repeatedly trips a breaker.

• You suspect a refrigerant leak.

• The compressor or fan is making unusual electrical or mechanical noises.

• The system continues short cycling after you've checked the filter and obvious airflow problems.

• You've tried the basic maintenance steps and the AC still isn't cooling properly.

Refrigerant and electrical problems require the right equipment and training. Don't open the system or attempt to repair those components yourself.

The Small Maintenance Jobs Are the Cheap Part

An AC problem doesn't automatically mean your system is about to die.

Sometimes the culprit really is a dirty filter, blocked airflow, or a neglected outdoor condenser.

That's why regular maintenance matters.

Check the filter. Keep the outdoor unit clear. Pay attention when the system starts making a new noise or behaving differently.

And keep track of when you actually did the maintenance.

House Simply's Home Warranty Maintenance Log gives you a simple place to record service dates and recurring home-maintenance tasks, so you don't have to rely on memory to keep your AC and other major systems on schedule.

A few minutes of maintenance is a lot easier to deal with than discovering a problem when you need the AC most.

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