When an attic fan stops working, trapped heat and moisture build up inside the attic. This causes your home to feel warmer, drives up air conditioning costs, and can eventually lead to warped roof shingles, mold growth, and damaged insulation.
When an attic fan fails to work, the cause is usually an electrical failure, a seized motor, or a tripped circuit breaker. Troubleshooting the unit requires a step-by-step approach to isolate whether the issue is with the power supply, thermostat, or the fan motor itself.
Attic fans typically last between 10 to 15 years, though solar-powered models can sometimes reach 20 years. The housing and blades often last indefinitely, but the motorized components degrade faster due to constant exposure to extreme attic heat, dust, and humidity.
Cost Insights: Attic fan motor repairs are $150 to $650, while thermostat and blade repairs run $60 to $300 depending on your fan type.
Do-It-Yourself Attic Fan Installation Instructions. To save time, use an existing roof or gable vent to install your new attic fan. This way you don't have to cut a brand new hole, but simply make the hole for the vent larger so it can accommodate the fan.
Attic fans range differently depending on what kind of the Attic fan you are installing, you can expect to pay between $350 to $1,000 installed.
If you're looking to install an attic fan, you'll need to hire a residential roofing contractor to do it for you. It's because attic fans need to be installed the first time correctly. Re-installing them can be an expensive endeavor that you would want to avoid.
Why should I hire a pro to install an attic fan? Unless you have previous electrical experience, you should always hire a licensed electrician for any electrical projects. Your electrician will discuss available options and help you select the best fan for your application.
Checking if a fan motor is bad involves a few simple visual, physical, and electrical tests.
Attic fans have fallen out of favor because they often do more harm than good. They create a "negative pressure" zone that can suck conditioned, expensive air out of your living space and pull dirty air, moisture, and allergens into your home. Additionally, they consume excess electricity and require regular maintenance.
A good rule of thumb is that if repair costs are around half the price of a new fan, replacement is usually the better value. You get a new unit, a manufacturer warranty, and the benefits of newer technology without the risk of paying to fix one problem only for another to show up soon after.
Signs of poor attic ventilation include trapped excessive heat, condensation buildup, and accelerated wear on your roof. Left unchecked, this can lead to expensive roof repairs, skyrocketing energy bills, and structural damage.
Running an attic fan in the winter can be beneficial, as it helps clear out moisture and prevents damaging ice dams. However, you should only run it intermittently using a humidistat and thermostat. Continuous operation can pull heated air out of your house, increasing energy bills.
While fixing an old, broken attic fan might seem like the quick solution, the reality is that repairing outdated attic fans can be costly, and often provides only a temporary fix. The smarter, more cost-effective choice is upgrading to a Solatube Solar-Powered Attic Fan– and we'll explain why.
An electric fan typically stops working due to a seized motor, a blown thermal fuse, a failed starting capacitor, or a faulty switch. These issues usually stem from a lack of lubrication, dust buildup, or prolonged overheating.
First, check the circuit breaker that controls the attic fan. If the fuse has blown, this can be as easy to fix as replacing the fuse in an older home or resetting the circuit breaker in a newer wired home.
While it can remove warm air, attic fans don't introduce cool air, which means homeowners in warmer climates will still rely on air conditioning units. Energy Costs– While running an attic fan isn't more energy intensive than a whole house fan; you won't see substantial energy savings.
On hot summer days, you can run your attic fan throughout the day and night. If temperatures cool significantly overnight, you can choose to turn off your attic fan until the morning.
For a 2000-square-foot home, you need roughly 6.56.5𝟔.𝟓 to 13.513.5𝟏𝟑.𝟓 square feet of total Net Free Area (NFA), which translates to about 77𝟕 to 1414𝟏𝟒 standard static roof vents.
Before testing the fan motor, first make sure that the power to the unit is turned off. To test the fan motor, you will need a multimeter. Set the multimeter to the resistance (ohms) setting and place the probes on the motor terminals. This test checks the continuity of the motor windings.
HVAC blower motors typically last between 10 to 20 years. However, their actual lifespan largely depends on usage, system quality, and routine maintenance.
Resetting a blower motor typically involves cycling the power, checking for tripped thermal switches, or adjusting your thermostat. These methods apply to residential HVAC systems, though the exact steps vary depending on whether you are working on a furnace, an AC unit, or a car's blower motor.
You should not put a regular fan (like a box fan or a desk fan) in your attic. Regular fans are designed to circulate room-temperature air and are not built to withstand the extreme temperatures or fire hazards present in an attic. Using one is both dangerous and largely ineffective.
With a few variables affecting the difficulty of the project, it typically costs between $100 and $300 for labor to install a ceiling fan. Your electrician's assessment of the project can help you plan and budget for your installation.
To cool an attic cheaply, maximize natural airflow and block radiant heat. Clear your existing soffit vents of debris to allow cooler outdoor air to enter, and ensure ridge or gable vents are open. Next, install a DIY reflective radiant barrier under your roof to block up to 97% of solar heat.