How to reset furnace blower?
Where is the Furnace Motor Reset Button?
- Turn off the power to the Lennox furnace at the circuit breaker which is marked.
- To access the blower motor and blower wheel which has a small yellow or red button on the side, you have to lift the blower compartment cover.
- Push the reset button down.
How much does it cost to replace a furnace blower?
This, along with your cost of labor, is what makes up the numbers on your final bill. The total cost to replace a furnace blower motor can run anywhere from $100 to $2,000, but this usually accounts for the motor, fan, and house altogether. In some cases, you might save cash by replacing only the motor and leaving the other parts as is.
Why is my furnace blower not working?
What to Do When a Furnace Blower Fan Won't Start
- Blower Relay. One of the most common problems with furnace fans is a bad blower relay. The first thing to do is check the relay or voltage from the board.
- Fan Control. This is another common reason behind faulty blower fans. ...
- Thermostat. Another way to diagnose the problem is by jumping out the thermostat. ...
Where is the blower motor resistor located?
Where is the blower resistor located? It's located inside the dash, often on the opposite side of the steering wheel or inside the engine compartment on the firewall. A blower motor resistor or a blower motor control module is the part that controls the speed of the blower motor.
Where is the blower fan located?
The blower motor is usually under the dashboard on the passenger side. Blower motors that make loud squeaks or rattling noises may be worn out and on the verge of packing it in, but sometimes those noises are caused by leaves or other debris that can be cleaned out after the motor is removed from the vehicle.
How do you know if your furnace blower motor is bad?
What Are Signs Your Blower Motor Needs to Be Replaced?Poor or Airflow from Air Vents.No Airflow At All From Vents.Skyrocketing Energy Bills.Strange Noises When You Turn on the Heat.Overheating Blower / Weird Smells.
Where is the blower motor reset button on a furnace?
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.
How do I test my furnace blower motor?
0:055:18Step by Step Procedure for Troubleshooting a Blower Motor ...YouTubeStart of suggested clipEnd of suggested clipAnd then you put one probe on there and one to the l2. Common neutral bar right here and you shouldMoreAnd then you put one probe on there and one to the l2. Common neutral bar right here and you should read 120 volts. If you read 120 volts. And your blower motor is not turning on then.
How much does it cost to replace a blower motor on a furnace?
$400 to $600On 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.
How long does it take to replace a furnace blower motor?
It takes between 45 to 90 minutes for a HVAC specialist to: replace the blower motor, adjust it, clean the fan, test it and assemble the furnace back together. The biggest challenge if you're doing it yourself is getting the assembly out.
Why is my furnace running but not blowing air?
Blower Issues The most common reason for a furnace running but not blowing air is likely due to issues with the blower or blower motor. The blower is responsible for pushing air out of the registers and when it fails no air will come out.
How do I reset my blower motor?
How to Find and Reset your Furnace Motor BlowerStep 1: Turn off the power to the furnace. ... Step 2: Remove the blower compartment cover. ... Step 3: Make sure the blower is completely cooled off. ... Step 4: Locate the reset button. ... Step 5: Press the button in (assuming that this is your issue and that the button has popped).
How do you manually reset a furnace?
How to Reset an Electric FurnaceFirst, turn off the power supply to the furnace by turning off the breaker in the circuit box.Locate the reset button on the furnace and press it to reset the furnace. ... If the button is popped up, press it down.Return the cover to the blower compartment and turn the power on.
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?
Fuse Protection To protect the blower motor power circuit, a 20-, 25- or 30-amp fuse is usually located in the fuse panel under the dash. The rating of the fuse will depend on the vehicle application and how much power the blower motor requires at full speed.
How do you diagnose a bad blower motor?
You might also hear ongoing whirring noises, or noises that change or get louder if you increase the fan speed. These are all signs of problems with the blower motor. In some cases, you may even notice smoke or smells of burning while driving, in which case you should pull over immediately.
How do I know if I need to replace the blower motor or the resistor?
Signs of a Bad Blower Motor Resistor Loss of HVAC fan control (total or certain speeds) The fan only works on its highest speed setting. No air coming from vents. Intermittent or inconsistent fan speed.
What does a bad blower motor sound like?
A defective blower motor will make a continuous sound noticeable by the passengers in the vehicle. It can manifest as a knocking, whirring, clunking, vibrating, squealing, or whining noise that persists until the blower motor is replaced.
Why is my furnace running but not blowing air?
Blower Issues The most common reason for a furnace running but not blowing air is likely due to issues with the blower or blower motor. The blower is responsible for pushing air out of the registers and when it fails no air will come out.
What is the Furnace Blower Motor, and What Does it Do?
The furnace blower motor is a fan within the furnace that helps push out conditioned (warm) air out of the furnace. Its primary role is to create air motion that directs warm air outside the furnace and into your home.
Where is the Furnace Blower Motor Located?
The blower motor is located in a box at the base of the furnace next to the air filter. The location is strategic in that the fan rotation helps pull return air through the vents and forces the air through the filter. Remember that furnace air filters trap up 99% of air impurities, including dust, pollen, and debris.
How to Locate the Furnace Blower Motor
If you’d like to access the furnace blower motor, perhaps to inspect it or troubleshoot the wiring or motor, proceed as follows;
How to Tell if Your Furnace Blower Motor is Bad
It’s often easy to tell if the blower wheel is bad, though sometimes you may need further tests to prove that it’s unsalvageable. Always begin by watching out for the following symptoms;
What Can Cause a Furnace Blower Motor to Stop Working?
A furnace blower motor can stop working for various reasons. However, the following are the eight most common reasons;
How to Reset a Furnace Blower Motor
If the blower motor simply shut down due to overheating or a lockout switch, a simple reset could restore it to normal function. The best part is that resetting a furnace blower motor is a straightforward process that doesn’t require professional intervention. It also takes five minutes at most.
Summary
Knowing how to find and reset the furnace blower motor can save you a lot of money whenever you run into blower fan issues. However, don’t hesitate to call for professional troubleshooting and repairs if the problem persists.
What is a Furnace Blower?
In a gas forced air furnace, it’s located in a box at the base of the furnace next to the air filter, where it draws return air through the filter. When switched on when requested by the thermostat and control board, the blower and motor push air across the burners in the combustion chamber where it gets heated, then the heat is transferred in the heat exchanger and blown out into the home’s ductwork.
Why does my blower motor make a noise?
One of the more common problems in a blower motor is the bearings. Bearings surround the motor shaft, allowing it to run smoothly at high RPM with almost no friction. When the bearings go bad, the motor may make a grinding or screeching sound, or not run at all because of the friction preventing the motor from turning.
How to prevent blower problems?
The single best thing you can do to prevent furnace blower problems is to have your furnace serviced by a professional HVAC technician annually. He will clean it to remove excess dust buildup, lubricate any moving parts that require it, and replace drive belt if required. It’s always best to have your furnace checked out before you need it – rather than calling us out on the coldest night of the year because your furnace isn’t running.
What happens when a blower blows?
When the blower malfunctions, the central heating and air conditioning system cannot performs its job.
How does a furnace work?
Other furnaces may use a belt-driven system, where the motor shaft connects to a pulley and drive belt, connected to turn the fan. Sometimes the belt can stretch or the tension can slip, preventing from turning the fan at the proper speed. Like a v-belt on your automobile, the belt should be inspected and adjusted regularly and replaced occasionally to ensure the system works properly.
Why does my motor smell like it's burning?
If the motor is packed with dust or dirt, or hasn’t been lubricated in a while (or ever!), the motor may overheat and cause an electrical short of mechanical failure, emitting an “unusual” odor or burning smell.
Can a furnace blower motor break?
Just like any other mechanical device with moving parts, the furnace blower motor is susceptible to breakdowns. Read on to determine if your blower motor is malfunctioning and when to call a professional HVAC contractor to examine, repair or replace it.
Where is the blower motor located on a furnace?
Note, The furnace blower motor is generally located in the bottom compartment of the furnace (behind the bottom door).
What is the function of a furnace blower motor?
The furnace blower motor is responsible for circulating air throughout your home; it blows the air heated by your furnace throughout the vents to ensure the home reaches the temperature called for by the thermostat.
What if my furnace blower is 120 volts?
If you see 120 volts on your meter, but your blower motor hasn’t been starting, then it’s very likely your blower motor is the culprit. You should now have a very good idea of how to check your furnace motor blower and determine whether it’s responsible for your faulty furnace!
How to tell if blower motor is not working?
Signs of your furnace blower motor not working include: a burning smell coming from the vents (or the furnace itself), or heard unusual sounds coming from your furnace (often described as a “humming”). Maybe your furnace only works intermittently, or conversely, the furnace seems to be running all the time, but the house is still cold!
How many wires are in a furnace?
The control board is in charge of all electrical operations for the furnace, so you likely have 12 – 15 wires running throughout this part of your furnace. Two (or maybe three) wires run from the control board to blower motor.
How to check blower motor?
Step 1: Turn off all power to the furnace. The first thing to do before you can check your blower motor is turn off your furnace power switch, if you have one. No furnace power switch? Turn the power off from your breaker box (just be sure the gas is turned off before turning off the breaker).
How many wires are there in a blower motor?
Two (or maybe three) wires run from the control board to blower motor. Find those wires and make a note of where they plug into your control board.
What is a blower in a furnace?
What It Is. The blower is one of the most appropriately named components in your furnace: its sole job is to blow hot air through the ducts and into your home. An important distinction to be made is that there is bother a blower motor and a blower fan. They are often referred to together as the “blower,” but the majority ...
What does a blower motor do?
The blower motor turns the blower fan, sending the air through your air ducts and into each room of the home. If your blower motor is single-speed, it will operate at 100% speed until the thermostat indicates that the desired temperature has been reached.
Why does my blower make a squeaky noise?
If you hear a screeching noise, that might be due to a blower motor that desperately needs lubrication. Banging noises during operation can be due to a problem with the blower assembly. It could be as severe as needing the entire blower replaced, or as simple as needing to tighten the motor mounts.
Why does my furnace make a screeching noise?
If you hear a screeching noise, that might be due to a blower motor that desperately needs lubrication.
How does a furnace work?
If it’s a natural gas furnace, it will use a process to combust natural gas. If it’s an electric furnace, it will use electricity instead. The warm air is created through a heat exchanger and will then be ready to go.
Does a furnace limit switch make air hot?
Your furnace won’ t know the difference, however, so it will simply continue to make hot air until it triggers the limit switch. Risk of overheating: One job of the limit switch is to turn off the heat in case the air inside the cabinet becomes too hot.
What is the drive of a furnace blower?
There are two main types of drives in furnace blower motors: Direct drive motors connect directly to the furnace blower wheel.
What is a blower motor?
The blower motor is the component in a central HVAC system that consumes the most energy. If you already have a variable speed blower motor in your furnace, and the motor is not clogged with debris, the motor may be wearing down and approaching end of life.
What Causes Blower Motor Failure?
Some of the reasons a blower motor might fail are overheating, and excessive moisture. When dust, dirt, and debris build up, it can cause the windings and bearings to burn up more quickly. Furnaces are usually installed in an out-of-the-way location, like the attic, basement, garage, or utility room. Blower motors that are clogged with debris, or that become saturated with moisture can fail due to overworking or electrical shorts.
How to tell if blower motor is overheating?
If you have an overheating blower motor, there will be clear signs. One would be a burning smell coming from your air vents every time you run the heat. Another sign is if the system shuts down, or if the blower stops while you are running the heat. This means the blower motor is overheating.
How long does a blower motor last?
Something to consider when replacing the blower motor in your HVAC system is how often you are paying for repairs. Most residential furnaces should last between fifteen and twenty years.
Why does my furnace make a squealing noise?
Screeching or squealing noises can be indicative of bearing problems in direct drive furnaces, or belt issues in older belt drive furnaces. Now, if your heating system is making rattling or knocking sounds, that usually means a broken or damaged part.
Why is my air vent motor clogged?
It may or may not indicate that you need a replacement motor. If there is no air or very weak airflow coming from the air vents, the motor may be clogged, or it may be malfunctioning. It is possible that the motor is clogged with dirt and dust, or has a bad capacitor, or there may be leaky air ducts.
