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Should My Furnace Be Blowing Cold Air?
Posted On: November 26, 2024
If your furnace is blowing cold air, it could indicate a problem that needs attention. Here are some common reasons and steps to troubleshoot:
1. Thermostat Settings
- Check the mode: Ensure the thermostat is set to "Heat" and not "Fan."
- Temperature setting: Confirm the temperature is set higher than the current room temperature.
2. Pilot Light or Ignition Issues
- In older furnaces, the pilot light may be out. Relight it following the manufacturer's instructions.
- For newer furnaces, a faulty electronic ignition system might be preventing the burners from lighting.
3. Clogged Air Filters
- Dirty filters can restrict airflow and cause the furnace to overheat, leading the safety mechanism to shut off the burners.
- Replace your filter if it’s clogged or dusty.
4. Overheating Furnace
- A furnace that overheats will trigger safety mechanisms, shutting down the heating elements while the blower continues to circulate air.
- Common causes include poor airflow or a malfunctioning blower motor.
5. Ductwork Problems
- Leaky or disconnected ducts can pull cold air into the system or fail to deliver warm air efficiently. Inspect your ducts for issues.
6. Empty Fuel Supply (Gas or Oil Furnaces)
- If your furnace relies on fuel, check the tank to ensure it's not empty.
7. Malfunctioning Components
- Issues with the blower motor, control board, or limit switch can cause cold air to blow.
- A professional HVAC technician can diagnose and repair these problems.
When to Call a Professional
If troubleshooting doesn’t resolve the issue, contact a licensed HVAC technician. They can identify and fix the underlying problem, ensuring your furnace operates efficiently.
Would you like help drafting a detailed guide or contacting a technician for assistance?
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See What Our Customers Are Saying:
Aug 17, 2024
I returned from vacation to find my AC unit on the Fritz. After calling way too many places I connected with TwinTech. Ive used the company in the past for my furnace so I was happy when I recognized Greg at my front door. Hes great and the service is always top notch. Id highly recommend using twintech for honest, superior service in the Durham region. Thanks!
Aug 13, 2024
I called Twin Tech when my air conditioning stopped working. Greg came over to diagnose the issue - the same day. He was able to diagnose the issue and resolve it quite quickly. Although it was a quick fix, Greg was very thorough in explaining the issue and provided great advice. Not to mention, I felt very comfortable having Greg in my home - which I consider very important when hiring a service provider. Twin Tech will be my go-to from now on. Thank you!!
Aug 12, 2024
Just hired TwinTech Heating & Cooling to do an A/C Unit removal & reinstall to allow for landscaping access on the side of my house, and they were wonderful!
Bob, Greg & Mitch make a great team! Quick appointment times, super knowledgeable, expert troubleshooting capabilities & very customer service oriented.
I would highly recommend them for all of your HVAC needs! Great job guys!!
Jul 23, 2024
Twintech Heating & Cooling installed my furnace in 2022 and in fall of 2023 installed my Panasonic Heat Pump. Greg and Mitch did a great job. Helped me through the rebate process. Super happy with the Heat Pump. Only used my furnace 5 times this winter. Energy bills lower, carbon emissions lower.Thank you Twintech. I recommend highly!
Jul 18, 2024
Just had a new furnace installed by Twintech. I cant express how great these guys are at what they do. From the sales to installation they were professional all the way. Very reasonable pricing and courteous during the installation and willing to answer any questions I had. Highly recommended !!!
Jul 17, 2024
They've cleaned my furnace a couple of times and mentioned that the hot water tank standards were going to change soon so I decided to change mine out.
There were a few challenges during the process but the installers handled the problems without missing a stride! I now have really hot water again!
Jul 16, 2024
Highly recommend Twintech Heating company, we got honest and detailed information on what was needed to replace and install a new gas furnace. Bob and Greg made us feel comfortable withe process through their thorough explanation and knowledge of the right furnace for our needs. The professionalism and courteous friendly attitude towards the customer is what we liked the most as they treated us like family. So happy with our decision and new furnace we will be looking into get our rental water heater replaced and installed by Twintech team. We feel better having their knowledge on our side and will only trust them with any further maintenance of furnace.
Jul 15, 2024
Customer service and knowledge is priority in this industry, and Twintech has it. I've dealt with their team for maintenance and a furnace replacement. They're accommodating and make great recommendations, and came through at a great price over the big guys in the industry. They'll be my next call when I need service or maintenance.
Jul 14, 2024
I decided that the noises and age of the existing furnace which was old and not very efficient to replace it. Gave Greg a call and Grant and Greg got to work on it. Because of supply issues with the current heating type that would be an easier install Greg convinced me to change the location of the system and it would provide me better service for heat and efficiency. I had skeptical but went ahead anyway putting trust in Greg And Grant. Greg, Grant and Mitch came through and in 2 days had completely relocated my heating and A/C system. I can honestly say Greg was right my old house has been warmer and more evenly heated as it ever was. For anyone reading this rather long winded review can take my word for it, Twin Tech can take care of your needs.
Jul 13, 2024
I called Twin Tech when my air conditioning stopped working. Greg came over to diagnose the issue - the same day. He was able to diagnose the issue and resolve it quite quickly. Although it was a quick fix, Greg was very thorough in explaining the issue and provided great advice. Not to mention, I felt very comfortable having Greg in my home - which I consider very important when hiring a service provider. Twin Tech will be my go-to from now on. Thank you!!
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