Although it doesn’t often freeze in Oakland, FL, you still need reliable heating when the occasional cold front moves through Orange County. It’s easy to panic when your furnace suddenly fails to produce heat.
An experienced HVAC tech can quickly figure out why a furnace blows cold air and propose the correct solution. If your heating system isn’t working properly, call us at Cool By Design, Oakland’s premier furnace repair service.
What To Do When a Furnace Blows Cold Air in Oakland, FL
If you aren’t a professional, it can be tricky to troubleshoot a furnace that won’t produce heat. However, you can take a couple of steps before calling your local HVAC service.
First, wait a few minutes. Your furnace might take a little time to warm the air. Next, check your thermostat settings. You may need to adjust the settings from air conditioning to heating or auto and possibly tweak the temperature setting if it’s too low.
Also, make sure the fan is auto-set so it doesn’t blow cold air when the system isn’t heating. For programmable thermostats, review your pre-set schedule.
Why a Furnace Blows Cold Air: 6 Possible Reasons
If your thermostat settings look fine, but your furnace still produces cold air, one of the following six issues may be the reason.
1. Clogged Filter
A dirty filter could be responsible for cool air coming from your furnace. If a clogged filter is the culprit, you may also notice a weak flow and short cycling. Your furnace short cycles if it only works for a couple of minutes before shutting off.
As you run your heating system, your furnace filter gradually becomes clogged with dust and dirt. This buildup can restrict airflow and make your furnace work less efficiently. If several months have passed since you’ve changed the filter, it may be time to replace it.
2. Leaky Ductwork
If your HVAC system is in good shape but you still feel cool or lukewarm air coming out from the vents, ductwork leaks may be the reason why a furnace blows cold air.
Ductwork can leak because of improperly sealed joints, age-related wear and tear, or even chewing damage from pests. You can hold your hand over any exposed ductwork sections when your heating system is working to see whether you can detect an air leak. If you suspect a duct leak but can’t locate it, we recommend scheduling a professional ductwork inspection.
3. Pilot Light That Won't Stay On
Do you have an older furnace with a standing pilot light? Your heating system won’t work when the pilot light is off. The pilot light may fail to ignite or stay on because of several issues, including a faulty thermocouple, a dirty pilot orifice, or even a strong draft that blows out the light.
The good news is that an HVAC pro can usually resolve pilot light issues pretty easily. However, you may also consider an upgrade to a newer, more advanced furnace with electronic ignition.
4. Faulty Blower Motor
If your furnace’s blower motor underperforms, your rooms may feel cold. You may also notice “cold spots,” i.e., uneven heating throughout your home, often coupled with weak airflow and suspicious banging or rattling noises.
Older furnaces are more susceptible to blower motor problems, especially without regular maintenance. When an HVAC tech inspects your furnace, they’ll check the blower motor for visible signs of wear and tear.
5. Clogged Condensate Lines
Still not sure why a furnace blows cold air? Have the condensate drain lines checked. These lines drive accumulated moisture away from the heating system. When something blocks the condensate line, the burners will deactivate.
A furnace condensate line may become clogged because of dirt or debris. Tube misalignment can also interfere with drainage. Get this problem diagnosed quickly to prevent corrosion and moisture damage.
6. Gas Supply Issues
Does your furnace turn on and off in addition to blowing cold air? If an inspection shows your HVAC system is fine, but your furnace still struggles to heat your home, you may have a fuel supply problem.
If your furnace runs on natural gas, check the supply line and contact your provider if necessary. An oil or propane furnace may simply need a fuel refill.
Cool By Design: Your Trusted HVAC Repair Service in Oakland, FL
Are you asking why a furnace blows cold air on a chilly day? Contact us at Cool By Design. Our skilled local technicians will fix your furnace issues or suggest a cost-effective upgrade to an energy-efficient HVAC system. Schedule a service call today.