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How To Find The Fuse In A Split Air Conditioner

How To Find The Fuse In A Split Air Conditioner

If your split air conditioner routinely blows fuses, this can be concerning. You’re in luck if you’re trying to figure out where the fuse is in a split air conditioner. This article contains all the information just for you.

The fuse is positioned in a fuse box or disconnect box on a mini-split air conditioner. In the exterior unit, the fuse is similarly located adjacent to the compressor. Your air conditioner is protected from electrical damage by the fuse.

An electrical shock has the potential to kill people, permanently damage your air conditioner, and injure nearby property. It’s crucial to know where the fuse box is on your split air conditioner.

In A Split Air Conditioner, Where Is The Fuse?

How To Find The Fuse In A Split Air Conditioner

A safety measure called a fuse was developed to prevent electrical damage to your air conditioner. A mini-split air conditioner’s power supply is managed by the fuse. The disconnect box that is connected to your air conditioner is where the fuse is typically found.

The expert will switch off the electricity at the fuse box so they may work on your mini-split, whether it be for repairs or routine maintenance.

How To Check Your AC Fuses And What To Look For

How To Find The Fuse In A Split Air Conditioner

An electrical problem can be detected by a blown fuse. You can find the problem by getting routine maintenance done. The condenser is prevented from receiving too much current by fuse protection for air conditioners.

AC Unit That Is Not Turning On

You most certainly have a blown fuse if you turn on your air conditioner and nothing happens. The external unit of your air conditioner will immediately stop working, and even though your thermostat keeps getting struck with decreasing temperatures, your gadget might not respond.

Your system must be switched off before your device will function, and you must repair the blown or damaged fuse to make sure it is safe. Your air conditioner may periodically trip the breaker due to a blown or damaged fuse.

Strange Noises Coming From The Unit

Loud or unusual noises emanating from your air conditioner are typically caused by damaged or missing isolation feet, leaks of refrigerant, loose parts, or a faulty compressor.

The noise, however, can also be a sign of a fuse blowing. There could be buzzing or screeching noises. The sounds are made as the air conditioner continues to draw power from the main power line’s cables.

Strange Odors

Around the air conditioner, you might smell something burning. The odour signals that something in the electrical wiring has burned or gotten too hot.

A short circuit or blown fuse in the air conditioner’s fan blower or circuit board may also be to blame for this odor. Although the odor should go away, if it gets stronger, a fire can break out.

Malfunctioning Of The Air Conditioner

You’ll also notice that your air conditioner stops working even after you’ve checked the circuits and breakers and tried restarting the machine.

Cables in your air conditioner or circuit box that are loose or partially exposed could cause a short that explodes a fuse. Electrical connections that are slack as a result of poor AC wiring or installation will eventually cause the AC to break down.

If your A/C is blowing fuses and malfunctioning as a result of insecure wiring, you should contact a professional immediately since it poses a major electrical risk.

How Do You Change Fuses In An Air Conditioner?

The fuse’s amperage handling capacity is determined by the maximum amperage that an A/C is rated for. Be sure to research the type of fuse you’ll be replacing before taking your air conditioner apart.

A fuse may easily explode if an air conditioner is used extensively, especially in the hot summer months. The steps described below should be followed in order to correctly replace a central air conditioner fuse.

Knowledge About Your AC

You must be aware of the sort of fuse you are changing. The air conditioning system’s power should first be turned off. Then locate the switch adjacent to the compressor on your device and check the fuses there.

Examine The Fuses

The door by the compressor’s switch should be opened. Inside this door should be two cartridge fuses with wires linked to either end. Use a voltage tester to check the voltage of the two wires coming from the disconnect switch, which is situated above the fuses.

Check the voltage at both terminals and the bottom wires using your voltage metre. There shouldn’t be any voltage after examining the wires.

Take The Fuses Out

Utilize fuse pullers to remove the fuses. Check each one’s indicated amperage. Verify the fuses’ rating kind as well, whether it be standard, rapid, or delay. Purchase a pair of fuses similar to the ones you removed.

Examine The New Fuses

Make sure to test the new fuses for continuity. By doing this, the fuses in a conventional, undamaged air conditioner will always function properly. Even though you might only need to replace one fuse, you should nevertheless replace the other one for convenience.

Put In The New Fuses

Use fuse pullers to instal the new set of fuses. The fuses need to be installed properly in their clamps. If the wires from the clamps aren’t properly positioned on the fuse terminals, your air conditioner won’t work.

Check Your AC

To check if you were successful in replacing your fuses properly, turn on the circuit breaker and thermostat for your appliance. Your work was successful if the device works as intended.

Why Would An AC Break Down Suddenly?

How To Find The Fuse In A Split Air Conditioner

If your air conditioner won’t turn on, you might be able to fix it yourself. In some instances, a technician may be required to resolve the problem.

Any problems that could harm your air conditioner should be avoided. Understanding the various causes of your AC failing to chill your home is the first step in doing this. The following are typical causes of an air conditioner breakdown:

Faulty Thermostat

Older thermostats with dials could be incorrectly calibrated, which would prevent your air conditioner from getting the right instructions from the control system. To fix this problem, a thermostat can simply be replaced or calibrated.

New programmable thermostats can be challenging to set up, and they sometimes have the wrong settings.

Low Refrigerant Levels

Refrigerant is used by your air conditioner to cool and dry the air in your house. You might not have enough refrigerant if your system has refrigerant line leaks to properly cool the air.

It takes more than just changing the refrigerant to fix this air conditioner problem completely. The leaks must be located, and the holes in the lines must be patched, by a technician. When there are numerous leaks, this method can be time-consuming and expensive.

Hissing or bubbling noises and an accumulation of ice on the exterior unit are indicators of this issue.

Obstructed Air Filters

Correct airflow is ensured by the filters. In this situation, your cooling system will have to work harder to keep your home comfortable, and eventually it may stop functioning.

When the air filter is clogged with dust and debris, the blower fan needs to work harder to circulate the air. When airflow is restricted because of a blocked air filter, the air conditioning system has to work harder to chill the house.

Your outdoor air conditioner may freeze up if you have dirty air filters, which will prevent your system from working.

Defective Capacitor

If your HVAC unit struggles to start, shuts off abruptly, or makes clicking noises from the outside unit, the capacitor in your air conditioner is definitely worn out.

A crucial component of any AC unit is the capacitor. It is plugged into the motor’s circuit and acts as a starter for the motor. At a certain speed, the motor disconnects the capacitor from the circuit.

Unclean Condenser

Your external unit’s condenser coils release the heat that was extracted from the outside air. If the condenser coil is dirty, your air conditioner could cease working entirely.

This can occur when moisture from the earth condenses, freezes, and solidifies while the air conditioner is running. This problem often results in the appliance operating less effectively, cooling unevenly, and emitting strange noises.

Your home’s air cannot be cooled since heat cannot be transmitted due to the accumulation of ice. When this happens, heat transfer is impeded, the unit has to work harder, increasing part wear and raising the possibility of a system failure.


The fuses for the air conditioner are located in the disconnect box. Look through the access panel on the machine to find the AC fuses and make sure none are blown.

A blown AC fuse will appear sooty and unclean. It may even be partially melted or deformed in some other way.

How To Find The Fuse In A Split Air Conditioner

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Written by HVAC Contributor

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