• Home
  • Why won’t my furnace blower fan turn on?

Why won’t my furnace blower fan turn on?

Author of the blog (work in a car repair shop)
Ask Q

Why won’t my furnace blower fan turn on?

If the fan does not start, you have a wiring issue (circuit breaker trips) or motor problem (circuit breaker does not trip). While your thermostat may be at fault, only an HVAC technician can diagnose and remedy the issue correctly. Time to call in the experts!If your furnace blower fan is not working, the fan motor is likely defective. Alternatively, you may have a wiring issue. These two are the most common reasons why the furnace blower may refuse to turn. However, it doesn’t mean that you should limit your troubleshooting to the two areas.

What would cause a furnace blower not to kick on?

Make sure that the power cord hasn't melted or a fuse hasn't been blown. If your cables are looking fine, try unplugging the fan for a few minutes and then plugging it back in again. Sometimes, this process can reset the motor and solve your furnace problems.

How do you reset a furnace blower motor?

Locate the reset button on the furnace and press it to reset the furnace. It is usually located inside the blower compartment on the side of the blower motor. Be cautious as the housing may be hot. If the button is popped up, press it down.

What would cause a furnace blower not to kick on?

Make sure that the power cord hasn't melted or a fuse hasn't been blown. If your cables are looking fine, try unplugging the fan for a few minutes and then plugging it back in again. Sometimes, this process can reset the motor and solve your furnace problems.

Can you run furnace without blower?

The blower fan motor The furnace can produce heat inside the combustion chamber—but that heat won't go anywhere if the blower fan isn't running. Because there's a danger of the furnace overheating without the blower fan, the furnace won't operate unless the blower has power.

What does blower motor reset button look like?

These blowers can be VERY hot. Step 4: Locate the reset button. This is usually on the side or the back of the blower motor. Often times, this button is red.

How much does it cost to fix a furnace blower?

Furnace Blower Motor Replacement Cost On average nationwide, a furnace blower motor replacement costs $400 to $600, including parts and labor. A single-speed blower motor costs around $450 to replace while a variable-speed motor costs $600 or more. You'll also need to budget labor, about $75 to $125 per hour.

Why is my blower fan not working?

If you see or hear the fan turn on, your blower motor is not the culprit. If the fan does not start, you have a wiring issue (circuit breaker trips) or motor problem (circuit breaker does not trip). While your thermostat may be at fault, only an HVAC technician can diagnose and remedy the issue correctly.

How do I know if it's the blower motor or the resistor?

Typically, if the fan will work on some speeds but not on others, the resistor is suspect. Okay, let's say there's no melting going on, but your fan doesn't work on all speeds. Typically, if the fan will work on some speeds but not on others, the resistor is suspect.

Is there a fuse for the heater blower?

Many vehicles have two fuses for the blower motor, one in the interior fuse block and the other under the hood. The blower motor is usually under the dashboard on the passenger side.

How much does it cost to fix a furnace blower?

Furnace Blower Motor Replacement Cost On average nationwide, a furnace blower motor replacement costs $400 to $600, including parts and labor. A single-speed blower motor costs around $450 to replace while a variable-speed motor costs $600 or more. You'll also need to budget labor, about $75 to $125 per hour.

How do you test a furnace blower motor capacitor?

Open the access panel to the furnace using a screwdriver. Lean close to the housing of the furnace blower, and listen for a loud humming sound. This is a sign of an electrical problem with the capacitor. If the humming does not stop, the capacitor should be tested.

What would cause a furnace blower not to kick on?

Make sure that the power cord hasn't melted or a fuse hasn't been blown. If your cables are looking fine, try unplugging the fan for a few minutes and then plugging it back in again. Sometimes, this process can reset the motor and solve your furnace problems.

How long should it take the blower to kick on a furnace?

In normal operation, your furnace blower fan should come on 1.5 to 3 minutes after your thermostat calls for heat and should turn off several minutes after the heating cycle ends.

Should I keep my fan on auto or on?

Keeping your fan on AUTO is the most energy-efficient option. The fan only runs when the system is on and not continuously. There is better dehumidification in your home during the summer months. When your fan is set to AUTO, moisture from cold cooling coils can drip and be drained outside.

Should you leave your furnace fan on in the winter?

The most obvious benefit to keeping the furnace fan on the “on” setting is more even heating and cooling distribution. Heat has a tendency to rise in the home during the winter due to “stack effect,” and parts of the home that see greater sun exposure may also become warmer than the rest of the house.

What does the reset button on a furnace do?

The purpose of the reset button on a furnace is to shut it down before it can trip your circuit breaker. The need for this may arise if the furnace becomes too hot, or if there is some sort of electrical system interruption. To get the furnace working again, you simply press the reset button back down again.

How long do furnace blower motors last?

How long does it take to replace a motor blower?

How long does it take to replace a blower motor? Replacing a blower motor takes 2 to 3 hours on average. The blower motor is typically located behind a control board and other furnace parts.

Is it hard to replace a blower motor?

The replacement of the blower motor is common and straightforward, so most shops will perform the repair — many on the same day.

What happens when the blower motor resistor goes out?

If the resistor shorts or fails, it may cause the blower motor to remain stuck on one fan speed. The heating and air conditioning systems may still function at one speed, however the resistor will have to be replaced in order for full functionality to be restored.

How much does it cost to replace blower motor resistor?

How much does a blower motor resistor cost? To replace the blower motor resistor, it would cost you anywhere between $50 to$150 – this includes the cost of equipment and labor. However, by doing it yourself at home, you can save up to $70.

Where is the blower fan resistor located?

The blower motor resistor is usually extremely easy to access, but the hard part can be positioning your body inside the car to remove the part. The resistor is at the bottom of the HVAC housing or just behind the glove compartment.

How can you tell if a fan fuse is blown?

Look at the fuse wire. If there is a visible gap in the wire or a dark or metallic smear inside the glass then the fuse is blown and needs to be replaced.

Where is the blower motor relay fuse located?

Under the instrument panel, look under the glove box. On the right side of the fender wall you will find another fuse box. The blower motor fuse is easy to replace.

How long do furnace blower motors last?

Why is my blower fan not turning off?

Limit Switch Issue | Furnace Blower Fan Wont Turn Off If the furnace overheats, then a limit switch will open. That will cause the burners or heat source to shut off and the fan to run until the limit switch closes again. In some cases, the limit switch will stick open, and this will cause the fan to run continuously.

What should I do if my furnace blower fan has power?

If your blower fan has power, then the next step is to check the thermostat on your furnace. Most thermostats will be set to “auto” automatically when they come from the factory. However, sometimes your thermostat will malfunction, get old, or be set incorrectly, and you’ll need to implement a manual override.

Why does my furnace blower run all the time?

Hi Fred! Most of the time blowers run continuously because the limit or one of the rollout switches is open. The furnace’s control board thinks that the furnace is overheating so it runs the blower. I would suggest that you check your limit and rollouts to make sure they are all closed with a voltmeter.

What should I do if my fan does not turn on?

Check for a loose or disconnected wire or a corroded electrical connector. Loose or broken fan belt On belt-driven blower assemblies - the blower fan motor runs but the fan does not turn Loose pulley on belt driven blower assemblies - the blower fan motor runs but the fan does not turn

Below you will find two interesting articles on a similar topic 👇

Where is the blower fan resistor located?

How much does it cost to fix the fan in a car?

Tired of looking for a video for your question?

Video Answer below 👇

Were our answers helpful?

Yes No

Thanks so much for your feedback!

Have more questions? Submit a request

FAQ for the last Day

  • How long does it take for a heater to turn back on?
  • Your furnace should start up within five minutes of you turning on your thermostat.How long does it take for furnace to reset? Press and hold the reset button for about 30 seconds. Raise your thermostat to the desired temperature. This should ignite your furnace. If there's no ignition, then it's time to call a professional. Why does my heat take so long to turn on? This could be a problem with th...


  • Why is my heater not coming on?
  • Dirty and clogged filters are one of the primary causes of furnace problems and can cause high operating costs. The heat exchanger can overheat and shut off quickly when filters are clogged with dust and dirt. This also causes soot buildup on the heat exchanger, which makes your furnace run less efficiently.Why is the heat in my house not turning on? If your heating system will not turn on, the fi...


  • How long should it take to replace a water heater?
  • Tank to Tank installation: On average, replacing a gas or electric water tank with a similar model takes two to three hours. It takes between 45 to 60 minutes to drain, disconnect and remove your old water heater.How long does it take to remove and replace a hot water heater? A certified plumber should be able to remove your old water heater and install the new one in approximately three hours. Ar...


  • How long does it take to change a water heater?
  • Tank to Tank installation: On average, replacing a gas or electric water tank with a similar model takes two to three hours. It takes between 45 to 60 minutes to drain, disconnect and remove your old water heater.Remove old water heater (45-60 minutes). As easy as this sounds, there’s really several steps that need to be taken to ensure safe removal -disconnecting the power source, draining the ta...


  • How long does it take for a water heater?
  • How long do you have to wait for hot water to come back? Typically, a water heater tank takes 30 to 40 minutes to heat up so if your water heater is still working, you can count on having more hot water come back in that amount of time as long as your system is still working adequately. How long does it take a 50 gallon water heater to heat up? How long does it take a water heater to warm up wate...


  • How long does it take to install a heat pump?
  • A simple back to back installation can be done in as little as 3 hours, but generally takes around 5 hours. More complex systems can take up to a day (or possibly longer) depending on the complexity of the system.How long does it take to get a heat pump installed? The time it takes to install a Heat Pump can be as short as 3 to 4 hours for a very simple back to back installation (e.g. indoor and o...


  • How long should it take to fix a furnace?
  • On average, home heating companies can complete the installation in about four to eight hours, depending on the size of your house.How long does it take to fix a furnace? On average, it takes about four to 10 hours to wrap up a furnace install, depending on the type and size of the unit. As expected, a larger, more complex model will take more time and effort than a standard unit. How hard is it t...


  • How long does it take to fit an AC?
  • For a standard air conditioning system, it can take from as little as 4 – 8 hours. Or, for a brand new full HVAC (heating, ventilation and air conditioner) system the installation time can be around 3 – 5 days.How long does it take for AC to be installed? Installation Timeline Generally speaking, the average installation will take anywhere from four to eight hours, which means the process of remov...


Comments

Leave a Comment

<
Email us