If your furnace is blowing cold air, you may be wondering what is wrong.
We will also provide tips on how to keep your furnace running smoothly all winter long!
Not getting enough fuel is one of the main reasons your furnace may be blowing cold air.
If your furnace isnt getting enough fuel, it will not be able to generate heat.
double-check you are checking your furnaces filters regularly and changing them when needed.
Also, be sure that the furnace is properly vented to the outside of your home.
If it is, you’re able to relight it following the manufacturers instructions.
Bad thermostat
A bad thermostat can cause your furnace to blow cold air.
you might test the thermostat by turning it off and then back on.
If the furnace still blows cold air, thethermostat is bad and needs to be replaced.
you could also test the furnace by turning it off and then on.
A bad thermostat can also cause your furnace to run constantly, which can lead to high utility bills.
So if youre experiencing any of these problems, be sure to call a furnace repair technician right away.
furnace, furnace repair, thermostat, utility bills.
The furnace control board is responsible for sending power to the furnace to heat your home.
This component controls the ignition, fan speed, and gas valve.
If it isnt working properly, your furnace may not heat correctly.
Trying to repair this component on your own can be dangerous.
Overheat protection
Overheat protection is one of the most important safety features on a furnace.
If the furnace overheats, it can cause a fire.
The overheat protection shuts off the gas to the furnace if the temperature gets too high.
This can happen if the blower isnt working properly or if there is something blocking the airflow.
Faulty main limit switch
A faulty main limit switch is the likely culprit if your furnace blows cold air.
If this is the problem, youll need a technician to come out and replace the limit switch.
If that doesnt work, you may need to call a technician.
If you suspect your furnace has a cracked heat exchanger, call a qualified technician to have it repaired.
A good maintenance routine will include checking the exchanger for cracks or other damage.
A dirty filter can cause your furnace to blow cold air.
Be sure to change your filter regularly to ensure optimal performance of your furnace.
If youre not sure when to change your filter, most filters have a lifespan indicator on them.
you’re free to also consult your furnaces owners manual for more specific instructions.
In some cases, a dirty blower wheel can also cause your furnace to blow cold air.
The blower wheel is responsible for circulating air through the furnace.
If it becomes dirty, it can reduce the amount of warm air that circulates through the furnace.
To clean the blower wheel, youll need to enter the interior of your furnace.
Once youve located the blower wheel, use a brush or vacuum attachment to remove any dirt or debris.
In this case, its best to call a professional for assistance.
A trained technician will be able to diagnose and sort out the problem quickly and efficiently.
Closed vents are one of the most common reasons why your furnace may be blowing cold air.
Its important to keep all of your vents open so that maintain a proper airflow throughout your home.
Clogged coil
Clogged coil can cause the furnace to blow cold air.
you’ve got the option to prevent this by cleaning the coil every year.
it’s possible for you to also call a professional to clean it for you.
They will have the proper tools and knowledge to do the job right.
Motor capacitor failure
Motor capacitor failure is one of the most common reasons a furnace will blow cold air.
The capacitor is responsible for providing the initial burst of energy needed to start the motor.
If it fails, the motor wont be able to start and the furnace will blow cold air.
Thermistor failure
Thermistor failure is the most common reason a furnace blows cold air.
The thermistor is a small sensor that measures the temperature of the air in the furnace.
Flame sensor
A flame sensor is one of the most important parts of a furnace.
If the flame sensor is dirty or damaged, it can cause the furnace to blow cold air.
The first step in troubleshooting this problem is to clean the flame sensor with a wire brush or sandpaper.
If that doesnt work, you may need to replace the sensor.
There are a few reasons why your furnace might be blowing cold air when the heat is turned on.
Another possibility is that the furnace itself isnt generating enough heat.
In some cases, cold air could be coming from the vents even though the furnace is working properly.
This might happen if your thermostat is set to fan only instead of heat.
Be sure to check your thermostat configs before assuming theres a problem with the furnace.
They can diagnose the problem and recommend a solution.
Related:Do You Need a Furnace in the Attic?
(Pros and Cons)
Furnace intermittently blows cold air.
Blowing cold air is not only uncomfortable, but can also be dangerous.
Its important to get this issue fixed as soon as possible.
Why is my furnace blowing cold air sometimes?
There are a few reasons why your furnace might be blowing cold air sometimes.
One possibility is that the furnace is not getting enough power.
Another possibility is that the furnace is not igniting properly.
Why is my gas furnace blowing cold air and wont shut off?
If the pilot light is out, then the furnace will not be able to produce heat.
Another possibility is that the thermostat is set to off instead of heat.
Be sure to check both of these things if your gas furnace is not shutting off.
How do I relight the pilot light on my gas furnace?
-Find the pilot light.
This is usually a small knob or lever near the bottom of the furnace.
-Turn off the power to the furnace.
This is usually done by flipping a switch near the furnace.
-Wait a few minutes for the gas to dissipate.
This is usually a small button near the pilot light.
-Push and hold the igniter until you see the pilot light start to glow.
-Release the button and continue holding the pilot light until it stays lit on its own.
One possible reason for this issue is that the furnaces blower motor may be failing.
Why is my oil furnace blowing cold air?
There are a few possible reasons why your oil furnace might be blowing cold air.
One possibility is that the furnace isnt getting enough fuel.
Another possibility is that theres something blocking the airflow to the furnace.
Finally, its also possible that theres something wrong with the furnace itself.
Why is my new furnace blowing cold air?
There could be a few reasons why your new furnace is blowing cold air.
One possibility is that the furnace isnt properly sized for your home.
Another possibility is that theres something blocking the airflow to the furnace.
Check your air filters and see to it theyre clean and properly installed.
Why is my electric furnace blowing cold air?
The heating elements may be burned out and need to be replaced.
Trying to fix an electric furnace can be dangerous if you dont know what youre doing.
Just confirm to keep an eye on it so it doesnt start a fire.
Why is my RV furnace blowing cold air?
There are a few potential reasons why your RV furnace is blowing cold air.
One possibility is that the furnace filter needs to be replaced.
Another possible issue could be a problem with the furnace motor or blower.
If the furnace is not receiving enough power, it will not be able to generate heat.
Finally, there could also be a problem with the thermostat setting or wiring.
confirm that the thermostat is set to heat mode and that all wires are properly connected.
Why is my furnace blowing cold air after a power outage?
There are a few possible reasons why your furnace may be blowing cold air after a power outage.
One possibility is that the power surge caused damage to your furnaces internal components.
If this is the case, you will likely need to have your furnace serviced or replaced.
Another possibility is that there was insufficient fuel in your furnaces tank when the power went out.
If this is the case, you will need to add more fuel to your furnaces tank.
Finally, it is also possible that something is blocking your furnaces exhaust vent.
If this is the case, you will need to erase the obstruction from your exhaust vent.
They will be able to diagnose the issue and provide a solution.
Why is my furnace blowing cold air only at night?
There are a few reasons this could be happening.
One possibility is that the furnace isnt getting enough power to run properly.
Check to check that the power switch is turned on and that the circuit breaker hasnt tripped.
Another possibility is that the furnaces pilot light has gone out.
relight it following the instructions in your owners manual.
One possibility is that the furnace filter needs to be replaced.
Another potential issue could be that the thermostat is set too low.
Finally, it could be that there is a problem with the furnace itself.
If the furnace is blowing cold air should I turn it off?
No, you should not turn off the furnace.
Turning off the furnace could make the problem worse.
Instead, call a technician to come and fix the furnace.
If your home does not have central heating, you should use a space heater to keep warm.
First, check to see if the furnace is actually turned on.
If it is, then check the thermostat to see if it is set to heat mode.
If both of these things are in order, then you may have a problem with the furnace itself.
The most common problems with furnaces are dirty filters, a clogged air intake, or a faulty igniter.
This is the simplest and least expensive solution.
Dirty filters restrict airflow and make the furnace work harder, costing you more in energy bills.
Filters should be replaced every month or two, depending on use.
If your filter is visibly dirty, it needs to be changed.
If its not dirty but youve had it for a while, change it anyway better safe than sorry!
Check the air intake to confirm it is free of debris.
If there is debris, remove it.
If the air intake is blocked, the furnace will not work properly.
Debris can block the airflow and prevent the furnace from working properly.
Remove any debris that you find and ensure that the air intake is clear.
Additional tips:
-Check the air filter monthly and replace it as needed.
A clean air filter will help to improve airflow and prevent potential problems with your furnace.
-Schedule an annual maintenance checkup for your furnace.
If the furnace has an igniter, check to see if it is working properly.
If the igniter has crapped out properly, you may need to replace it.
If your furnace does not have an igniter, check the pilot light.
If the pilot light is out, you will need to relight it.
To do this, follow the instructions in your furnaces owners manual.
after you snag checked the igniter or pilot light, try turning on the furnace.
If it still does not work, you may need to call a technician.
First, check that your filter is clean and replaced when needed.
Second, check the insulation around your doors and windows to check that there is no air leakage.
Finally, schedule regular maintenance checks with a qualified technician.
By following these tips, you could help ensure that your furnace will run smoothly all winter long.
This can be a real pain, especially in the middle of winter.
Luckily, there are some things you might do to prevent this from happening in the future.
First, verify that your furnace is properly maintained.
A well-maintained furnace is less likely to have problems with cold air.
Second, if your furnace does start blowing cold air, dont panic.
Turn it off immediately and call a professional for help.
Doing these two things should help you prevent furnace blowing cold air in the future.
Remember, a well-maintained furnace is the key to keeping your home warm and comfortable all winter long.
How do you reset a furnace that blows cold air?
If your furnace is blowing cold air, it may be due to a variety of issues.
Once the furnace has been turned back on, check to see if the problem has been fixed.
If not, you may need to contact a professional for further assistance.
Honeywell thermostat blowing cold air on heat setting.
Checked the breakers and they are all on.
Set the thermostat to heat and the furnace kicks on but only blows cold air.
Tried setting it to emergency heat and still only blows cold air.
What could be causing this?
One possible reason for your Honeywell thermostat blowing cold air could be that the batteries are low.
Check to confirm the batteries are installed correctly and have enough charge.
If they do, you may need to replace the thermostat.
Another possibility is that there is something blocking the air flow in your furnace.
confirm there is nothing obstructing the vents and that all of the filters are clean.
If neither of those solutions work, you may need to call a professional for help.
They will be able to diagnose and fix the problem quickly.
First, check to see if the pilot light is lit.
If its not, relighting it may solve the problem.
Replacing the thermocouple is a relatively easy and inexpensive fix.
Replacing the blower motor is a more complex repair, so you may need to call in a professional.
