How Much Does It Cost to Install an AC Disconnect? [2025 Data]

The cost to install an AC disconnect can range from $150 all the way up to $3,000 if you don’t have ample space or amperage on your circuit breaker. The price most homeowners pay is $350. An AC disconnect is best installed at the time you install your AC unit, but it can be added afterward. Installing a disconnect (usually a fuse box or switch box) will turn off the energy supply to your AC unit from the outdoors, allowing for safe mechanical work to be done.

How Much Does It Cost to Install an AC Disconnect Box on a New AC Unit? 

If your electrician installs an AC disconnect at the same time you install a new AC unit, you’re likely looking at a much less costly project, about $200 to $400. Your electrician can hook up the disconnect to your breaker box at the same time and ensure the wiring and amperage are correct.

How Much Does It Cost to Install an AC Disconnect Box on an Existing AC Unit? 

The cost to install an AC disconnect on your existing AC unit typically ranges from $300 to $500, but it depends on how far away your outdoor condenser unit is from your circuit breaker. The electrician may need to fish more wiring, ensure the amperage is correct, split wires, or add extra breakers in your breaker box.

If your outdoor unit is far away from your electrical panel, such as on the other side of the house, or you don't have wiring leading from the condensing unit to the panel, then your costs will be considerably higher.

Get at least three estimates from electricians near you to assess your AC unit and electrical panel.

Why You Should Hire an Electrician

Installing an AC disconnect is a task that should only be left to a professional electrician near you. Do not attempt this task on your own.

Here’s why it’s ideal to hire an electrician

Installing an AC disconnect is complex and dangerous work for those without the proper experience. Here’s why you should hire an electrician:

• Often, AC disconnects are installed at the same time as the AC unit. In that case, ensure your HVAC contractor performs this task as part of the overall installation.

• No matter when the AC disconnect is installed, it requires an understanding of voltage, fuses, and wires. Simple mistakes can lead to issues with your AC and electrical wiring.

• Permits may be required for this task. A local electrician will be familiar with the permit requirements and can more easily guide you through this process.

• Working on an AC disconnect box without the proper training could lead to shock, electrocution, or even death.

AC Disconnect Cost Breakdown

The total cost of installing an AC disconnect depends on how far your condenser unit is from your electrical panel and the difficulty of adding the disconnect to your circuit breaker. 

AC Disconnect Unit

AC disconnect units range from $20 to $75 for residential homes, with the average being $35. Your electrician should inspect your air conditioner to determine the type of disconnect you need. Check to ensure the price of the unit is included in their quote.  

Labor

Installing an AC disconnect usually takes two to four hours, if your electrical panel is up-to-date and has space for the disconnect to be installed. Electricians charge $50 to $100 per hour. If your AC unit is far away from your circuit breaker, the project could take longer.

You may need to upgrade your electrical service to higher amperage if your current panel can’t accommodate the AC disconnect, which can cost up to $3,000.

Wires

For the AC disconnect to reach from your outdoor condenser unit to your electrical panel, you’ll need wiring to make the connection. The cost of wires depends on the type needed (an electrician can determine this) and the linear footage. 

Permit

Your electrician may have to pull a permit to install an AC disconnect. Electrical permits range from $10 to $500, depending on your local codes. If your electrician is installing your AC unit at the same time, they can often work under that same permit.

What Factors Influence the Cost to Install an AC Disconnect?

There are a few key factors that impact the cost of installing an AC disconnect. The best way to get an accurate quote is to contact at least three local electricians to scope out the project and give you a rate. 

Installing a Disconnect on a New vs. Existing AC Unit

It’s easier and faster for an electrician to install an AC disconnect at the same time they're installing a new AC unit. If your AC unit is already in place, there may be extra expenses, including the time and supplies to fish wire from the disconnect to your electrical panel. 

Distance From AC Unit to Electrical Panel

The closer your AC unit is to your electrical panel, the easier and faster it is for the electrician to install the disconnect. 

Availability in the Panel

If there’s not already wiring leading from the outdoor condensing unit to your electrical panel, then you’ll need an extra spot on your circuit breaker. If you have any open spots, the cost is minimal beyond the time and wire to connect it. But if your electrical panel doesn’t have space, you may have to upgrade your amperage and service, which can be costly. 

How Angi Gets Its Cost Data

Home is the most important place on earth, which is why Angi has helped more than 150 million homeowners transform their houses into homes they adore. To help homeowners with their next project, Angi provides readers with the most accurate cost data and upholds strict editorial standards. We extensively research project costs to develop the pricing data you see, so you can make the best decisions for you and your home. We rely on reputable sources, including the U.S. Bureau of Labor Statistics, academic journals, market studies, and interviews with industry experts—all to ensure our prices reflect real-world projects. 

Want to help us improve our cost data? Send us a recent project quote to [email protected]. Quotes and personal information will not be shared publicly.