If your furnace turns off and on repeatedly, it could be a sign of something wrong. It’s essential to fix the problem as soon as possible, as furnace problems can lead to expensive repairs down the road.
This blog post will discuss some of the most common causes of furnaces turning off and on. We will also provide you with some tips on how to troubleshoot the problem yourself.
Faulty Thermostat
The thermostat regulates the temperature of the overall heating system. The thermostat may be faulty or damaged, causing the system to switch on and off fast. It’s possible that the wiring is extremely old and needs replacement. The thermostat’s batteries may need replacement. It’s also possible that the issue is with the thermostat’s placement.
The thermostat may switch on and off erratically if it is located near direct sunlight or another heat source. Unless it’s simply the batteries that need replacement, you should have a professional look at it.
What can you do?
You can try to check the batteries first. If that doesn’t work, you can try to reposition the thermostat. If neither of those solutions works, you should contact a professional for help.
Dirty Air Filter
The furnace’s air filter helps to remove contaminants from the air. A dirty air filter can cause the furnace to turn on and off repeatedly because it’s not getting enough airflow.
What can you do?
You should check the furnace’s air filter at least once a month. If it’s dirty, you should replace it with a new one. It’s also a good idea to keep spare filters on hand so that you can quickly replace them when needed.
Furnace is Overheating
HVAC systems feature built-in components that keep them safe from harm. A residential furnace’s goal is to provide warmth, but it may sometimes get overly hot. The furnace will automatically cut off if it reaches an unsafe heat level. If you don’t turn it off right away, fractures in the heat exchanger might occur, allowing hazardous carbon monoxide to escape.
So, in some ways, turning off the computer as soon as it overheats is a good thing. Airflow obstructions produced by clogged exhaust vents and dirty air filters are the most common causes of overheating.
What can you do?
You should check the furnace’s air filter at least once a month. If it’s dirty, you should replace it with a new one. It’s also a good idea to keep spare filters on hand so that you can quickly replace them when needed. You should also ensure that the furnace’s exhaust vents are clear and free of obstructions.
If your furnace is still overheating, even after replacing the air filter and clearing the exhaust vents, you should contact a professional for help. Overheating furnaces can be dangerous, so it’s best to leave it to the professionals.
Defective Flame Sensor
In most furnaces, this is a common cause of a short cycle. The flame sensor determines how much gas is being delivered to the furnace. It loses its capacity to perform its function correctly when it gets filthy, which it does over time.
Whether this is the case, the gas valve will not be able to discern if the gas is being consumed by the flame and will shut off the gas supply to the burner. These are safety mechanisms that prevent excessive gas accumulation.
What can you do?
The furnace will need to be shut off and disassembled so the flame sensor can be cleaned. You should not attempt this yourself, as it is a delicate process. You should contact a professional for help.
Turned Off Blower Motor
The furnace’s blower motor helps to circulate air throughout the home. When the blower motor is switched off, the furnace will turn on and off repeatedly because it’s not getting enough airflow. Place your palm near your palm to check if air is blowing from any home vent. The fault is with the blower motor when the airflow is poor or non-existent.
What can you do?
You should check the furnace’s blower motor to ensure it’s turned on. If it’s turned off, you should turn it on. If the blower motor is switched off, the furnace will turn on and off repeatedly because it’s not getting enough airflow.
Conclusion
Several reasons your furnace might be turning on and off repeatedly. The most common causes are a dirty air filter, furnace overheating, and a defective flame sensor. You can try fixing the problem by checking the furnace’s air filter and blower motor. If the problem persists, you should contact a professional for help.
Furnace Repair Winnipeg offers HVAC repairs, furnace maintenance, and air conditioner services in Winnipeg. Our team of furnace repair experts is available 24/ seven to help you with all your furnace needs. Contact us today for a free quote!
