Your furnace may be blowing cold air because
the filter is too dirty
. A dirty air filter blocks airflow over the furnace's heat exchanger, causing it to overheat. When overheating, your furnace can trip a high limit switch, causing the furnace burners to shut off so that the heat exchanger does not crack.
How do I reset my luxaire furnace?
Locate the dedicated circuit breaker for
your Luxaire furnace in the electrical service panel of your home after you turn off the furnace thermostat. Flip the circuit breaker off, then turn it back on. Reset the thermostat and wait for the furnace to restart.
What do I do if my heater is blowing cold air?
When your furnace blows cold air, try
turning the heating unit off and on
. If the air feels warm for a moment or two, then switches to cold, it may be that the flame sensor is dirty. With a dirty flame sensor, your gas burner won't stay lit, causing the air to go cold soon after the furnace turns on.
Why is my furnace running but no heat?
Furnace filters
Dirty filters are the most common cause of furnace problems. Dust and dirt restrict airflow—and if the filter gets too clogged, the heat exchanger will overheat and shut off too quickly, and your house won't warm up. If the blower is running but no heat is coming out,
replace the filter
.
Can hear your furnace click on but it does not fire up?
The Pilot Light (Faulty Ignition Sensor)
The pilot light or ignition sensor is usually the most common issue when your furnace will not ignite. This is typically the problem if you can hear your furnace click on but it does not fire up. … If the sensor or ignitor is dirty, it will need to be cleaned.
All furnaces are equipped with a reset button. They are generally red or yellow and are located
inside the blower compartment
. The reset button is a safety feature that will shut down the furnace when a problem is detected, often a hot or overheating furnace, before it trips the circuit breaker.
Why does my heat feel like cold air?
There are a few reasons your heat pump could be blowing cold air. …
Turn off the heat at the thermostat and check your air filter
. If it's dirty, change it! Make sure the thermostat is set to “AUTO”, not “ON”.
Why is cold air blowing when the heat is on?
Your furnace may be blowing cold air
because the filter is too dirty
. A dirty air filter blocks airflow over the furnace's heat exchanger, causing it to overheat. When overheating, your furnace can trip a high limit switch, causing the furnace burners to shut off so that the heat exchanger does not crack.
Why is cold air coming out of my vents when the heat is on?
Your Air Filter Is
Dirty
Clogged air filters could be causing cold air to blow out of your vents. A dirty air filter can block airflow over your furnace's heat exchanger, which can cause it to overheat.
What to check if heat is not working?
Check your power source—a tripped circuit breaker or blown fuse could be the reason for your furnace failure. Reset your breaker or replace the fuse to see if that restores heat.
Check your filter
—if it's so dirty that your system is struggling to move air through it, your furnace could overheat and shut down.
Why did my heater stop blowing hot air?
First, check
to make sure the thermostat is set correctly
. You will want to make sure that the fan control is set to auto, and not ‘on'. If the thermostat appears set correctly, turn off your heater at the thermostat and check the filter. If the filter is dirty, replace it.
Why is my heater not blowing out hot air?
As seen above, different reasons can make your heater fail to blow out hot air. These reasons include
an incorrect thermostat setting, broken ductwork, dirty air filters, wrong-sized heater units
, and dirty flame sensors.
How do you fix a furnace that won't ignite?
- Check if the igniter is getting power. While the igniter is connected, turn the furnace to On.
- When the inducer motor comes on, use the leads on the meter, one on each igniter connection. If it shows about 120 volts, there is power to the igniter. …
- Check the resistance of the igniter.
How do you fix a furnace ignition lockout?
Most modern gas furnaces can be reset by turning off the power, waiting around
20 seconds
, then switching the power back on. Other furnace models may exit lockout after 1-2 hours and attempt to power on again. If your furnace has a pilot light, you may need to relight it following the manufacturer's instructions.
How do you know if furnace ignitor is bad?
- The Furnace Stops Running. When a furnace won't run at all, check for a bad ignitor. …
- Your Furnace Blows Chilly Air. Unless you've set your thermostat to COOL, your furnace should not blow cold air. …
- Does Your Furnace Short Cycle? …
- A No Glow Ignitor. …
- We Can Replace Your Furnace Ignitor.
How do you reset a furnace control board?
- Find the switch mounted on or near the furnace and turn the power off. …
- Wait about 10 seconds.
- Turn the switch or breaker back on and check the furnace to see that it has power again.
