Which fuse is for an air conditioner?

Author: Holly Beier  |  Last update: Wednesday, July 30, 2025

Typically, AC systems use “TR”-type fuses to ensure safe system operation. However, if you're in a pinch and need to replace a fuse quickly, you can use a fuse that is rated for a lower amperage than what the system is rated.

Which fuse controls the air conditioning?

Usually, AC units use “TR”-type fuses to ensure safe operation. However, if you need to replace a fuse quickly and don't have that exact one, you can use a fuse rated for a lower amperage.

What fuse do I need for my AC?

Low-Peak dual-element and Fusetron dual-element fuses are recommended for branch circuit protection of air conditioning and refrigeration hermetic motor- compressors because these fuses have an adequate time-delay for motor starting surges.

What does an AC fuse look like?

Fuses for protecting HVAC equipment are typically cylindrical cartridges that snap into fuse holders inside the manual disconnect box. They're opaque, so when one blows you may not be able to tell by looking at it. You can test for a blown fuse with a multimeter, or do as some people do and simply replace it.

Will the AC unit run if fuse is blown?

If the fuse is blown, the air conditioner will quit working and you'll need to have your AC repaired.

2017 Kia Soul AC Fuses & Blower Motor Fuse

How do I reset my AC fuse?

If you have fuses, you can only reset the AC by taking the fuse out. After the 30 minutes lapses, reinstall the fuse back in position if it's still in good condition, but replace a worn-out fuse with a new one. Now turn the AC back on, confirm if the thermostat is set to cool, and observe how the unit functions.

Where is the AC reset button?

In AC systems, the air conditioner reset button is on the outside unit's lower edge, typically close to the ground. Some models have the reset button located behind the service panel, which may require tools to remove. Reset buttons are usually red or yellow with a clear “reset” label.

What type of fuse is AC?

AC fuses are primarily of two types- low voltage fuses and high voltage fuses. Low voltage AC fuses are electric fuses having a voltage rating less than or equal to 1,500V. Rewireable fuses and cartridge type fuses are some important examples of low voltage AC fuses.

Why is my AC unit not kicking on?

Check the thermostat

You should check if it's been set to the correct temperature and also make sure it's set to “cool”. If the AC settings are not right, it won't turn on. You can also check if the batteries in the thermostat are fresh and replace them if needed.

How do you know if AC fuse is bad?

Blowing the fuse cuts the power to the unit to prevent electrical damage. If your AC has shut down and won't start again, especially if you've noticed odd electrical behavior immediately before the shutdown, chances are the fuse has done its job and will need to be replaced.

Which breaker is for my AC?

Check Your Circuit Breakers

To check if this is the case, locate the A/C circuit breaker on your circuit breaker panel; it's the main power distribution panel that can be located inside or outside of your house. It's usually marked as “A/C,” “HVAC,” or “air-conditioner”.

Are all AC fuses the same?

This is where AC fuses become important. These small devices are crucial for protecting your electronic equipment from power surges that may occur during storms or due to other electrical faults. AC fuses are not one-size-fits-all.

How much does it cost to replace an AC fuse?

AC Fuse, Circuit Breaker, or Relay Replacement Cost

Expect to pay between $15 and $300 to have AC fuse and circuit breaker issues addressed or relays in your AC unit replaced. These projects do not usually take more than a couple of hours.

Can a blown fuse cause AC not to work in a car?

Electrical Issues:

Various electrical problems, such as a faulty relay, blown fuse, bad sensors, loose connections, or damaged wiring, can disrupt the functioning of the car air conditioner. Solution: Check the electrical components associated with the AC system and replace any damaged parts.

How long do AC fuses last?

This could be because of too-high levels of refrigerant in the AC, or as a result of frequently turning the machine off and then back on very quickly (within a minute of turning it off). The lifespan of a fuse can be up to 20 years.

Which fuse goes to the AC?

Typically, AC systems use “TR”-type fuses to ensure safe system operation. However, if you're in a pinch and need to replace a fuse quickly, you can use a fuse that is rated for a lower amperage than what the system is rated.

How to tell if a fuse is blown?

It's important to be able to recognize the signs. If your device suddenly stops working, it could be a blown fuse. Check for discoloration or markings on the fuse. If you see any damage, there's a good chance the fuse needs to be replaced.

Do AC disconnects go bad?

There have been many breakdowns and even fires over the years caused by issues with disconnects. Make inspecting them a regular part of your maintenance and service call process, and you can save some issues.

Do all outside AC units have a reset button?

Not all air conditioning units have a reset button, but if yours does, it's typically located on the outdoor unit. Here's how to locate it: Turn Off the Power: Before you search for the reset button, ensure the power to the unit is turned off for safety reasons.

Why is my AC not turning on?

There are a number of reasons why your AC unit may stop working unexpectedly, including electrical problems, blockages, thermostat issues, and more. Troubleshooting includes checking your circuit breakers, thermostat settings, and replacing your air filters.

How to reset breaker for AC?

Turning Off & Resetting Your AC Unit in 4 Simple Steps
  1. Shut it Off.
  2. Get to the Circuit Breaker. So far, so good. ...
  3. Wait 30 Seconds. After turning off the circuit breaker linked to the AC unit, wait for a full minute. ...
  4. Turn it Back On. After waiting for 1 minute, the AC unit will reset on its own.

How do I know if AC fuse is blown?

AC Fuse Blown Symptoms
  1. Strange sounds are coming from your air conditioning unit.
  2. Your circuit breaker keeps tripping.
  3. Your unit smells like it is burning or gives off the smell of exhaust.
  4. Water is leaking from the unit.
  5. Your system freezes up or only works on the highest setting.

Where is the AC breaker located?

Circuit breakers can be found in homes, businesses, and industrial facilities. They are typically located in the main electrical panel, which is typically located in the basement or garage.

Will AC turn on if fuse is blown?

Fuses play a vital role in maintaining the overall integrity of the AC system, ensuring its safe and reliable operation while also safeguarding against potential fire hazards that could arise from electrical failures. If the AC fuse blows, your air conditioner won't turn on.

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