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How Much Does It Cost To Repair An Attic Fan Or Vent?

Typical Range: $186 - $400

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Attic fan repair averages $293, typically costing homeowners between $186 and $400. Whole house fan repair ranges from $250 to $350 but can cost up to $650. Replacing a broken motor will cost about $125 for an attic fan and between $50 and $100 for a whole house model. Professional installation will run an added $80 to $100 per hour.
An attic fan is installed at the roof level of your home and regulates heat by exhausting hot air. It needs more roof vents to draw in fresh air as the hot air moves out. They run during the heat of the day, ventilating the attic space only. If it’s still broken, heat will continue to build up and cause temperature problems in the rest of your home.
A whole house fan is mounted in the attic floor above a grille in the ceiling of a central hallway. In the morning and/or at night when outdoor temperatures are cool, the homeowner turns on the system. It draws warm air out, while open windows allow cool air into the home.
Though commonly confused, these two models serve different purposes. However, the construction of the units is similar. Repairs will also be comparable. To ensure your unit is working properly, consider hiring a professional to do the work.

On This Page

  1. Finding the Issue and Steps to Fix
    1. Motor Replacement
    2. Electrical Work
    3. Thermostat
    4. Belt & Switch
    5. Mount to Roof vs. Wall Gable vs. Floor
    6. Solar Fans
    7. Other Parts
  2. Attic and Whole House Fan Replacement vs. Repairs
    1. How to Replace
  3. Cost Factors
    1. Accessibility
    2. Energy Savings
  4. DIY vs. Hiring a Service
  5. Who Does These Repairs?

Attic Fan Repair Cost Calculator

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National Average
$293
Typical Range
$186 - $400
Low End - High End
$85 - $600

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Cost data is based on actual project costs as reported by 1,375 HomeAdvisor members in .

What Isn’t Working? How to Fix Your Fan

The first step to repair is figuring out what’s not working. This information will tell you how much it will cost to restore the part, or whether it would be cheaper to replace the part. You may be able to complete minor fixes yourself. To ensure safety and prevent future problems, you should always hire a pro for major projects, like electrical or roof work. Expect to pay between $80 and $100 per hour for labor with a one-hour minimum.

Vent Fan Motor Replacement - $50 - $100 + labor

These range in price from $50 to $100 to replace, not including the hour or two of labor required. Professionals charge between $80 - $100 per hour.
The most expensive fan repair is the motor. Once you rule out electrical, thermostat, and other minor problems, it is the most likely culprit. If the motor is not running properly, you will need to have it serviced by a professional. Either option's price depends on what exactly the issue is in the motor. Buying a new motor and paying the cost to repair it could be more expensive than a full system replacement.

Electrical

If the problem is electrical, it could be as simple as a blown fuse or a bad connection. Check your electrical box for a tripped circuit. You may be able to simply flip the breaker for an inexpensive fix.
If your electricity appears to be working, check your unit’s belts, switches, and thermostat (see below). If those all function properly, check the motor. If none of these seem to be the problem, find and call an electrician.

Thermostat - $50 - $100 + labor

If a thermostat controls your fan, try turning your switch on and off and bypassing the thermostat. If that works, then you know this is the source of the issue. Repairs vary in price depending on the problem, and it might be cheaper to replace. Consult a professional electrician or HVAC contractor for exact costs. He/she may be able to install a remote thermostat for $50 to $100, plus labor charges.

Belt & Switch - $10 each

At around $10 each, belts and switches are the easiest and least expensive replacement to make. If the parts are easy to access, a homeowner can service them him/herself. Otherwise, a professional contractor can give a quote for labor.
Hire a Contractor to Help Diagnose the Issue
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Mount: Roof vs. Wall Gable vs. Floor

It is difficult to only replace the mount of a fan. Professionals can find and insert new parts, but the physical mount itself often attaches to the section of the fan which holds the blades. If there is surface damage to the mount, then consider replacing the whole fan with a new one.
Professionals can fix problems related to the mount’s base. If it is unstable or unsecure, a handyman can tighten the grips holding it in place. They can also work on the surface where the mount attaches. Roof, ceiling, and wall repairs are often part of mount repairs. Depending on the damage, a roof repair can cost between $340 and $1,250. Fixing your wall cost between $50 and $1,250. A ceiling fix can be the cheapest at a range of $150 to $2,200.
Regardless of the location of your fan, part prices and labor rates will remain about the same. However, in the event your attic is in poor shape or your unit is hard to reach, a professional may need more time to make the repairs. Hourly labor charges will increase if this is the case.
These mount on either the roof of the home or a gable wall of the attic. At a rate of $45 to $75 per hour, a roofer can cut the hole, install the roof-mounted unit and roof vents, and reseal the roof. For about $70 per hour, a carpenter can cut a hole or widen a gable vent to install a gable-mounted unit.

Solar-Powered Ventilation Fans

Solar fans feature many of the same parts as electrical ones. Many of the parts, like belts, thermostats, and switches, will be the same. The costs to repair or replace them are also similar.
In the event the solar panel itself breaks, you should contact a solar professional to restore the units. Solar panel repairs cost most homeowners between $200 to $1,100. When installed and serviced by a license professional, many include a manufacturer’s warranty that covers parts and labor for up to 25 years.

Other Parts

Ventilation systems have a variety of other pieces that can break. Due to their complexity, a professional should complete most of the repairs.
  • Shutters/Grill: $80 to $100 each
  • Blades: $10 to $15 each
  • Cover/Cap: Contact a professional for replacement options.
Pros may also be able to provide parts that are unavailable to consumers or difficult to find. In the event the manufacturer discontinues a model, your pro may be able to source a new part from scraps or make the part him/herself. Otherwise, you may need to replace the entire unit.
Consult with a Fan Repair Specialist
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Attic Fan Replacement vs. Repairs

When the cost of repair far exceeds the cost of replacement, you should install a new attic or whole house unit. If the two are close in price, then you should repair. Replacement may include hidden fees such as uninstalling or disposing of the old parts.
Attic fan replacement averages about $560. Most homeowners can expect to pay between $340 and $780. Depending on the quality of the model you choose, location, and add-ons, the project can run as little as $200, or as much as $1,300. Labor rates fall between $90 to $150 per hour for the two hours that it typically takes for the replacement project, including removal of the old unit. Rewiring will take about one hour at a rate of $65 to $85 per hour.

Replace or Repair a Whole House Fan

Sometimes a fan is not salvageable. When this is the case, property owners should consider the factors affecting replacement. Homeowners pay between $1,200 and $1,800 on average. On the low end, you can expect to pay between $700 and $950, including labor. On the high end, the project can cost $2,000 to $2,750. Installation requires the expertise of both a professional carpenter and an electrician at a rate of $65 to $85 per hour to ensure proper ventilation and wiring. Some professionals have experience in both fields but might charge a higher hourly rate.
A carpenter will charge around $70 an hour to install and make any necessary ceiling modifications. The work will take about 2 hours, for a total labor cost of around $140.
You will also need to hire an electrician to connect the unit to your home’s electricity source. Your pro can also mount and connect solar panels. Wiring will take at least one hour at a rate of $65 to $85 per hour.

How to Replace a Fan

Replacing your whole house or attic fan requires extensive electrical knowledge and manpower. The required steps include:
  1. Turning off the fan’s power supply
  2. Opening the thermostat/regulator cover and remove all wiring. If you’re replacing your regulator as well, unscrew and remove that along with the other parts.
  3. Unscrewing and removing the motor and fan, disposing of the old parts.
  4. Inserting the new fan into the existing space from the old one. If it is a different size than the old one, consult with a professional to either fill in or widen the space without compromising the integrity of the roof, floor, or wall.
  5. Clamping all cables together and remove sheathing from the wires.
  6. If you’re replacing your regulator, attach the new thermostat to the wall. If not, move on to step 7.
  7. Attaching all wires to the regulator. This process can vary depending on your brand or type of fan. Consult the instructions provided with the unit.
  8. Snapping the cover back on the regulator and set controls to your desired temperature
  9. Turning your circuit breaker back on for testing.
It’s always best to work with an electrical contractor if you’re unsure of your ability to perform the task. A professional can give you the peace of mind that the unit is safe and accurately installed.
Hire a Repairman to Replace Your Attic Fan
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Cost Factors

In some cases, other factors will affect your decision to repair or replace your attic or whole house system.

Accessibility

How easy is it to get to your attic fan? If it is in a space that is difficult to find and access, this could add to the cost of repair. If there is no room to get to it, it removal might be necessary. Any of these circumstances could increase the amount of time it takes to complete the project. If it’s difficult to access, ask your pro to inspect the unit and provide a quote prior to performing the work.
Regardless of the location of your fan, part prices and labor rates will remain about the same. However, in the event your attic is in poor shape or your unit is hard to reach, a professional may need more time to make the repairs. Hourly labor charges will increase accordingly.

Energy Savings

An attic or whole house fan can save you a lot on your energy bills because it can cool down your home instead of using air conditioning. A faulty unit may cost a lot to repair, but you may make up the difference with the energy savings.
Attic temperatures can reach up to 150 degrees in mild to hot climates. Fans pull hot air outside to reduce the temperature. No longer competing with the super-heated air above, your air conditioner cools the air inside your home more efficiently. In some cases, your professional may suggest an alternative solution, such as upgraded insulation and/or a better seal to prevent heat from affecting the rest of the home.
A whole house unit offers significant energy savings. In mild to moderate climates, this type of system can eliminate the need for AC for most of the year by pulling warm air from the interior of the home and replacing it with cooler, outside air. It only uses 10 to 15% of the power of a traditional air conditioner.
Hire an Fan Contractor to Repair Your Attic or Whole House Fan
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DIY vs. Hiring a Service

If your unit stops working, you can and should take minor troubleshooting steps before calling a professional. Check for a tripped breaker, faulty thermostat, or broken belt. The repair and replacement of these ventilation systems is complex and requires professional expertise, however. Hiring a pro will ensure you address safety concerns like attic ventilation and expensive future repairs.

Who Repairs Attic Fans?

Installation may require the expertise of more than one contractor. Labor rates will depend on the model you choose and your existing home features. A roofing professional can install a roof-mounted unit. A carpenter can install a gable-mounted or whole-house fan. An electrician will need to complete the wiring. An HVAC company specialist will likely be able to provide turnkey installation because they have professionals in each area of expertise.
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How do we get this data?

  1. Homeowners visit HomeAdvisor.com to find a top-rated pro to complete their home improvement project or repair.

  2. Once their projects are completed, the members log in to their accounts and complete a short cost survey.

  3. After compiling and organizing the data, we report it back to you.