Frigidaire Window Air Conditioner Troubleshooting Guide

Frigidaire is one of the most popular and reliable brands when it comes to window air conditioning units. With proper maintenance and care, a Frigidaire window AC can provide many years of cooling and comfort. However, like any appliance, air conditioners can sometimes malfunction or break down. When this happens, being able to troubleshoot and diagnose the issue can save you money on repair costs and get your AC running again quickly.

In this comprehensive guide, we’ll cover the most common Frigidaire window air conditioner problems and provide troubleshooting tips to get your unit back up and running. We’ll also discuss when it’s time to call in a professional AC repair technician.

Why Proper Troubleshooting is Important

Air conditioners contain many mechanical, electrical and chemical components that allow them to cool and dehumidify the air. The compressor, fans, thermostat, control board, and refrigerant lines all have to work together properly to produce cold air. If just one part malfunctions, the entire AC unit can stop functioning efficiently.

Troubleshooting involves methodically checking different components and systems to isolate the root cause of the problem. This allows you to fix the specific issue instead of replacing random parts and hoping for the best. Proper troubleshooting saves time, money and frustration compared to a trial-and-error approach.

In some cases, you may be able to troubleshoot and fix the issue yourself. Other times, you’ll need to call in a professional AC repair technician to properly diagnose and repair the unit. This guide will help you determine whether a problem is DIY-friendly or best left to the experts.

Common Frigidaire Window AC Problems

There are several issues that can arise with Frigidaire window ACs. Here are some of the most common problems and their potential causes:

1. AC Won’t Turn On

If your Frigidaire AC won’t power on at all, there are a few parts to check:

  • Power supply – Check that the unit is plugged in, the outlet is working, and the breaker hasn’t tripped. Also check for a blown fuse.
  • Clogged air filter – A dirty, clogged air filter can prevent proper airflow and operation.
  • Refrigerant leak – Low refrigerant levels due to a leak will prevent the AC from turning on.
  • Faulty compressor – The compressor is responsible for circulation of refrigerant. If it’s broken, the AC won’t turn on.

2. AC Won’t Turn Off

If the AC runs constantly even when the unit is turned off, potential causes include:

  • Dirty condenser coils – Clogged condenser coils can confuse the AC, forcing it to run excessively.
  • Faulty components – Issues with the thermostat, thermistor, control boards or relays can cause the AC to get stuck turning on.

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3. AC Not Cooling Properly

There are several reasons why your Frigidaire AC may not be cooling down the room effectively:

  • Improper unit sizing – The cooling capacity needs to match the size of the space. An undersized AC won’t cool properly.
  • Dirty air filter and coils – Clogged filters and condenser coils can cause the AC to ice up or overheat instead of cooling down.
  • Refrigerant leaks – Low refrigerant levels affect the AC’s ability to cool.
  • Thermostat and compressor issues – Faulty thermostats and compressors can disrupt normal cooling operation.

4. AC Not Heating Properly

Frigidaire window ACs that come with heating functionality may fail to provide adequate heating for the following reasons:

  • Incorrect temperature setting – If the thermostat is set too low, the unit won’t activate the heating mode.
  • Dirty air filter or condenser coils – Clogged components can cause the AC to blow warm air when set to heat mode.
  • Ice buildup – Excess ice on the coils due to refrigerant issues or a faulty defrost cycle can greatly reduce heating capability.
  • Loss of power – A tripped breaker or blown fuse stops electricity from reaching the AC.
  • Airflow obstructions – Blocked vents or objects placed directly in front of the AC affect air intake and heating performance.

5. Excessively Noisy AC

Some noise during operation is normal, but loud, excessive noise usually indicates an issue:

  • Debris – Sticks, leaves or other debris stuck in the condenser fan can cause buzzing, scraping or rattling sounds.
  • Damaged fan – Bent, warped or out-of-balance fan blades produce loud whirring, grinding or clicking noises.
  • Refrigerant leaks – Low refrigerant causes the compressor to work too hard and run loudly.
  • Worn-out compressor – Old compressors are prone to producing loud hums and vibrations.

6. Control Panel Not Working

If the control panel or remote control stops operating the AC, potential culprits are:

  • Power issues – No power due to a tripped breaker or blown fuse disables the controls.
  • Low batteries – Dead batteries in the remote control mean it can’t send signals.
  • Faulty control board – Problems with the circuitry on the main control board can lead to unresponsive controls.
  • Bad components – Defective compresors, thermistors and wiring can affect the control panel.

7. AC Compressor Not Working

The compressor is essential for pumping and circulating the refrigerant in the AC system. If it fails, the unit won’t be able to produce cold air.

  • Power supply issues – Lack of power from a tripped breaker or blown fuse will shut down the compressor.
  • Refrigerant leaks – Not enough refrigerant reaching the compressor will prevent it from operating.
  • Faulty capacitors – Bad start and run capacitors can prevent the compressor motor from starting.
  • Burned out motor – Electrical issues and wear and tear over time can cause the compressor motor to fail.
  • Control circuit problems – Issues with the thermostat, control board and wiring can disrupt signals to the compressor.

8. AC Reset Button/Breaker Keeps Tripping

It’s normal for the reset button or breaker to trip occasionally. But if it happens frequently:

  • Electrical issues – A weak breaker or compressor, or a short in the wiring can cause frequent tripping.
  • Clogged condenser coils – Dirty coils make the AC work too hard and overheat, tripping the reset.
  • Faulty compressor – An improperly grounded, old or damaged compressor will repeatedly trip the reset.
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9. Water Leaking

Water should drain through designated tubes and exits. Leaking water indicates a problem:

  • Clogged drain tubes – Debris in the drain line prevents water from exiting properly.
  • Damaged drain pan – Cracks and rust in the drain pan cause water to leak out the bottom or sides.
  • Misaligned or missing drain plugs – Improperly inserted or missing drain plugs lead to water leaks.

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Troubleshooting and DIY Repairs

Many common Frigidaire AC problems can be troubleshot and fixed without professional help. Here are some do-it-yourself troubleshooting tips:

AC won’t turn on

  • Check for tripped breakers or blown fuses. Reset breakers and replace fuses.
  • Clean clogged air filters by vacuuming or washing. Replace if too dirty.
  • Verify unit is plugged in and outlet is functioning.

AC won’t turn off

  • Clean debris and dirt off condenser coils with a brush, hose or coil cleaner.
  • Make sure thermostat is set to the “off” position.

AC not cooling properly

  • Adjust thermostat to a lower temperature.
  • Clean air filter and condenser coils.
  • Check supply registers and return air grilles for obstructions.
  • Make sure outdoor unit has at least 12″ clearance on all sides.

AC not heating properly

  • Set thermostat to a higher temperature.
  • Ensure vents aren’t blocked by objects or furniture.
  • Clean debris off outdoor condenser unit.

Noisy AC unit

  • Clean fan blades, housings and motor assemblies.
  • Tighten loose bolts and fasteners on fans and compressor.
  • Straighten bent fan blades with pliers.

Water leaking issues

  • Clear dirt and debris from drain tubes with a small wire.
  • Check for cracks and clean out drain pan.
  • Re-insert drain plugs if missing or dislodged.

Reset button keeps tripping

  • Clean condenser coils and air filter.
  • Have an electrician check for shorts in wiring.
  • Ensure adequate air circulation around the unit.

When to Call a Professional

While regular maintenance and minor repairs can be performed yourself, there are some issues that require a professional AC repair technician:

  • Refrigerant leaks – Only certified HVAC technicians can handle refrigerant. Attempting DIY repairs risks damaging the unit.
  • Electrical problems – Faulty capacitors, compressors, control boards, etc. should be diagnosed and replaced by a skilled technician to avoid shock or fire hazards.
  • Drainage line clogs – Severe clogs in the condensate drainage line may require snaking by a technician to fully clear blockages.
  • Gas furnace problems – Gas-powered furnace components of the AC should only be repaired by licensed HVAC pros for your safety.
  • Major part replacement – Installing new compressors, evaporator coils and condenser units is best left to seasoned AC service technicians.
  • Whole unit replacement – If the AC system is too old and inefficient to repair, a technician can advise you on replacement options.
  • Strange noises – Unfamiliar hisses, knocks or scrapes could indicate serious issues. Let a technician inspect and diagnose the problem.
  • Ice buildup – Significant ice forming on the coils should be examined by a technician to check for refrigerant leaks or system issues.

Don’t hesitate to call in an HVAC pro for diagnosis and repairs if you’re unsure about the cause of the problem or how to fix it.

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Resetting Your Frigidaire AC

Resetting the air conditioning unit is one of the easiest troubleshooting steps you can take to restore normal operation. Follow these steps:

Using the Reset Button

  1. Locate the reset button on the plug or control panel. Consult your owner’s manual if unsure.
  2. Unplug the AC unit or turn off power at the breaker.
  3. Press and hold the reset button for 3-5 seconds.
  4. Plug the unit back in or turn power back on.

Using the Circuit Breaker

  1. Locate the breaker controlling the AC unit and switch it to the “OFF” position.
  2. Leave it off for at least 60 seconds.
  3. Flip the breaker back to the “ON” position.
  4. Let the AC restart and resume operation as normal.

Resetting often resolves minor control and power-related issues. If problems persist after resetting, continue troubleshooting or call for service.

Preventative Maintenance

Regular maintenance helps minimize AC problems and keep your unit running efficiently.

  • Replace air filters monthly or as needed
  • Clean and inspect condenser coils yearly
  • Vacuum debris around outdoor unit
  • Clear vegetation and leaves from around unit
  • Ensure drain line stays clear of obstructions
  • Keep fins on coils clean and straight
  • Arrange professional seasonal tune-ups
  • Verify refrigerant charge every year or two

Following the manufacturer’s suggested maintenance will extend the life of your Frigidaire AC.


Frigidaire makes reliable window air conditioning units, but they can still develop issues just like any appliance. Following a proper troubleshooting sequence allows you to accurately diagnose problems. Simple maintenance and minor repairs can often be performed DIY. However, it’s important to call in an HVAC technician for any tasks involving refrigerant, gas, electrical or major components.

Keeping this Frigidaire window AC troubleshooting guide handy empowers you to properly maintain your unit and determine whether an issue is within your repair capabilities or requires professional expertise. Proper troubleshooting saves you the time, money and hassle of replacing parts randomly in an attempt to stumble upon an elusive problem. With the right knowledge and preparation, you can keep your Frigidaire window air conditioner running optimally for many cooling seasons.

Frequently Asked Questions

Q: Why does my Frigidaire AC freeze up?

A: Ice or frost forming on the coils is usually due to low refrigerant levels, dirty filters/coils, a faulty thermostat or a problem with the defrost cycle. A technician can diagnose and fix this issue.

Q: What should I do if my AC is leaking water?

A: Check for clogged drain lines or a damaged drain pan. Clear debris from drain tubes and clean the drain pan if needed. Have a tech inspect for cracks or leaks in the pan.

Q: My AC is turning on and off rapidly, why?

A: Frequent cycling is typically caused by a dirty filter, obstructed air flow, an improperly sized unit or a faulty thermostat. Cleaning the filter and removing obstructions around the vents can help.

Q: I hear strange noises coming from my outdoor AC unit. What does this mean?

A: Unusual noises could indicate issues with debris stuck in the unit, damaged fan blades or problems with the compressor. Have a technician inspect and diagnose the cause.

Q: The AC works fine, but the control panel doesn’t work. How can I fix this?

A: If the remote control is unresponsive, try replacing batteries. For a unresponsive hardwired panel, look for electrical issues or contact an HVAC technician.

Q: How often should I service my Frigidaire window AC?

A: Frigidaire recommends professional preventative maintenance before each cooling season. DIY maintenance like changing filters should be done monthly.

Q: What should I do if the reset button or breaker keeps tripping?

A: Frequent tripping indicates an electrical issue such as a weak breaker, short circuit or compressor overload. Contact a technician to inspect the cause.

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