Why Isn’t My Air Conditioner Working? 9 Common Causes for West Des Moines Homeowners

When summer temperatures rise in West Des Moines, Iowa, the last thing you want is an air conditioner that won’t keep your home comfortable. Whether you’re relaxing after shopping at Jordan Creek or winding down from a day at Raccoon River Park, your AC should be the least of your worries. If it stops cooling, don’t panic—many common problems can be checked before calling a professional.

1. Thermostat Issues

Your thermostat is the “command center” of your cooling system.

Confirm it’s set to “Cool” mode and a temperature lower than the current room temp.
If the screen is blank, replace batteries or reset the thermostat—it may be faulty.

2. Dirty or Clogged Air Filter

Dust and pollen are common in Iowa summers and quickly clog filters.

A blocked filter reduces airflow, causing weak cooling or frozen coils.
Replace filters every 1–3 months to keep air moving efficiently.

3. Tripped Circuit Breaker or Blown Fuse

Electrical surges, especially during summer storms, can trip breakers.

Check your panel for a switch labeled “AC” or “HVAC.” Reset it once.
If it trips again, stop and call a professional.

4. Outdoor Unit Problems

Your outdoor condenser needs clear airflow to cool properly.

Remove grass clippings, leaves, or yard debris within 2 feet.
Use a garden hose to gently rinse the coil.

5. Frozen Evaporator Coils

Ice on your system signals a problem.

Often caused by dirty filters, blocked vents, or low refrigerant.
Shut the system off, let it thaw, and call for service if the issue repeats.

6. Clogged Condensate Drain Line

High Iowa humidity means plenty of moisture in your AC’s drain line.

A clog can cause the system to shut down.
If water pools near the unit, call a technician to clear the blockage.

7. Low Refrigerant or Refrigerant Leaks

Refrigerant is essential for cooling your home.

Low levels lead to weak cooling or frozen coils.
Only licensed HVAC techs can repair leaks and recharge refrigerant.

8. Faulty Startup Components

If you hear buzzing, clicking, or your AC won’t start, it may be:

A failing capacitor, contactor, compressor, or motor.
These repairs require professional expertise due to high voltage.

9. Ductwork Leaks or Poor Insulation

Even if your AC is running, cool air may escape before it reaches your rooms.

Older West Des Moines homes may have duct leaks or insulation issues.
Sealing ducts and improving insulation can boost comfort and efficiency.

Quick DIY Troubleshooting Checklist

Before calling for service, check:

Thermostat settings and batteries
Air filter condition
Breaker/fuse box
Debris around outdoor unit
Vents open and unobstructed
Ice on coils
Condensate drain line

If your AC still isn’t cooling, turn it off and call a licensed technician.

When to Call a Professional

It’s time to call a trusted West Des Moines HVAC expert if you notice:

Warm air continues blowing
Ice forms again after thawing
Breaker keeps tripping
Strange noises or burning smells
Water pooling around the unit

At Golden Rule Plumbing, Heating, Cooling & Electrical, we’ve proudly served West Des Moines families for years with fast, reliable AC repair. Our licensed HVAC team can quickly diagnose problems and get your home comfortable again.

Call Golden Rule Plumbing, Heating, Cooling & Electrical book online here for fast, reliable AC repair service today.