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Why Your Furnace Is Blowing Cold Air

Why Your Furnace Is Blowing Cold Air

Why Your Furnace Is Blowing Cold Air

It's always a surprise when we go to turn on the furnace expecting warm air but instead we get a gust of frigid air. There could be several causes to why your furnace is blowing cold air instead of warm air; some could need repair, some could be something you could fix yourself. This guide will help you identify what the possible causes are and if there are any that you can fix yourself to get your furnace running and warming your home the way it should.

Clogged Air Filter

One of the quickest and simplest things to check and sometimes fix is the air filter. An air filter that's too dirty can block airflow and make the furnace insufficiently heat your home. The solution here is simple; replace the air filter. If the filter you have is simply too dirty, replace it. Inspect the filter around once a month and replace it if it's significantly dirty.

Pilot Light Issues

The pilot light or the energy source powering the appliance controls the temperature of the furnace; if it's too low, your furnace might be blowing cold air. If the pilot light is off, it could be an issue with the thermocouple or the gas pressure. If you smell gas, call your local appliance repair specialist about the concern as soon as possible.

Thermostat Problems

If you have a thermostat, it might be the reason for the furnace to be blowing cold air. If the thermostat settings are wrong, the furnace won't heat your house to the degrees it should. Make sure the thermostat is programmed and set to the desired temperature. Check the batteries if it is running on battery power, if the batteries are dead the thermostat won't be able to communicate with the furnace.

Dirty Furnace

The furnace might simply need some cleaning. If the furnace hasn't been cleaned in some time, making sure the coils and blower are not excessively dusty or needs cleaning, the parts of the furnace can become clogged with dirt, limiting the efficiency of the furnace. Clean out the furnace and make sure the blower motor isn't clogged.

Clogged or Malfunctioning Vent

The vents in your home may be blocked with dirt and grime, reducing the air pressure and thus the temperature. Have a professional make sure your air registers are free from dirt and let the air flow in coming no matter what.

Electrical Malfunction

Is your furnace blowing cold air, but you thermostat is set correctly, the filter clean and nothing else seems to be wrong? Then you might be looking at an electrical malfunction; check if all the wires are connected, the LEDs are illuminated and the fan is running.

If all of the issues above have been checked and nothing could be found, it might be time to call a specialist to help you out and repair your furnace. If you are having continued issues with your furnace amidst having followed all of the steps above, Call Local Reliable Appliance Repair at (866) 516-1222 to help you out. If you wish to read more information about Furnace blowing cold air, visit

Why Your Furnace Is Blowing Cold Air
Why Your Furnace Is Blowing Cold Air
Why Your Furnace Is Blowing Cold Air

Furnace Blowing Cold Air

PLEASE make sure to take preventive action to avoid furnace blowing cold air issues. These manufacturer recommendations and local appliance or HVAC technician's recommendations are especially important for San Diego homeowners.

Clean and Inspect Furnace Filters

PLEASE make sure to change or clean furnace filters on a regular basis to ensure that air is flowing properly. This will help to ensure that air is not being blocked from entering the blower. If the filter is dirty, the air that passes through will be cold and the furnace will not run correctly.

Inspect and Clean Burners

PLEASE regularly inspect and clean the furnace's burners. A buildup of soot or blockages can cause cold air to be blown out because the burner is not receiving enough gas. Clean the burners with a cloth, vacuum, or compressed air.

Inspect the Fan Motor

PLEASE check the fan motor on a yearly basis. If the motor is not working correctly, the fan may not be able to move the air efficiently, causing the furnace to blow cold air. It is important to replace the motor if it is not working correctly.

Test Limit Switches

PLEASE test the limit switch on a regular basis. The switch is responsible for controlling the air flow from the blower and must be functioning correctly in order to avoid cold air coming out. If the switch is not operating correctly, it must be adjusted or replaced.

Check the Ignition System

PLEASE check the ignition system on a yearly basis to make sure that it is functioning correctly. A faulty ignition system can cause the furnace to blow cold air. It is important to inspect the system for cracks or damage and replace any components that are not working properly.

Replace Thermostat

PLEASE consider replacing the thermostat if the furnace is not heating properly. The thermostat is responsible for controlling the temperature of the air and must be functioning correctly. If the thermostat is faulty, it must be replaced with a new one.

By following these manufacturer recommendations and local appliance or HVAC technician's recommendations, San Diego homeowners can take preventive action against issues of furnace blowing cold air.

Average Repair Cost for Furnace Blowing Cold Air in San Diego

If your furnace is blowing cold air, it's important to get it repaired quickly. Local Reliable Appliance Repair can quickly provide professional repairs to your furnace in San Diego.

Depending on the cause of the problem, professional repairs can range from a minimum of $325-$500 (includes labor and materials), to more complex repairs up to $1,400- $2000. The cost includes parts and labor.

As an example, a minimum repair could include replacing the blower motor, capacitor, and thermocouple. For a more complex repair, the repair company may need to replace additional parts such as the gas valve or air handler. Additionally, you may need to replace the furnace filter, if it is clogged or dirty.

Finally, it's important to note that extra fees may be applied if additional materials are needed or if any additional diagnostics services are needed.

For more information on professional furnance repair in San Diego, please contact Local Reliable Appliance Repair.

Fixing Furnace Blowing Cold Air

Furnaces that blow cold air can be very frustrating and leave you feeling like you have no control over the temperature of your home. If your furnace is blowing cold air instead of sending hot air through your vents, it is important to get it diagnosed and repaired as soon as possible.

At Reliable Appliance Repair, we take the stress out of dealing with cold air coming from your furnace. As a local San Diego family-owned HVAC and appliance repair company, we understand how integral your furnace is to your home's comfort. That's why our team of highly trained technicians with at least five years of experience in the field are here to get it running again in no time.

We offer same-day service for furnace repair and installation and we pride ourselves in offering fair and affordable prices for our services. We are licensed and insured, and as a first-time customer you can even get $25 off of labor!

If your furnace is blowing cold air and you need help getting it repaired quickly and affordably, don't hesitate to contact Reliable Appliance Repair. We are here to take the stress off of your shoulders and make sure your home is comfortable again quickly and efficiently.

FAQ: Why Is My Furnace Blowing Cold Air?

Q: What Causes Furnace Blowing Cold Air?

A variety of factors can lead to furnace blowing cold air, including clogged air filters, a faulty heat exchanger, a thermostat malfunction, and incorrect gas pressure.

Q: How Can I Troubleshoot the Problem?

To troubleshoot a furnace blowing cold air, start by replacing the high-efficiency furnace filter and check the batteries in the digital thermostat. Next, clean the blower motor and check the wire connections. Finally, inspect the gas pressure and the flame sensor.

Q: How Can I Prevent It from Happening Again?

To prevent cold air from being blown by the furnace, regularly inspect and clean the furnace filter, motor, and flame sensor. Additionally, schedule an annual maintenance check of the furnace in order to identify any potential problems.

Q: Is it Safe to Try to Fix It Myself?

No, it is not safe or recommended to attempt to fix a furnace blowing cold air yourself. You should always hire an experienced and certified technician to assess and repair your furnace.

If you have a furnace that’s blowing cold air, it is best to call a local, reliable appliance repair service at (866) 516-1222 for reliable service.