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HVAC Company Lindstrom MN | Why is My Furnace Blowing Out Cold Air?

HVAC Company Lindstrom MNHVAC Company Lindstrom MN | Why is My Furnace Blowing Out Cold Air?


You’ve been trying to get your furnace working, but it’s still blowing out cold air. It might seem like a simple fix, but there are actually several common reasons why a furnace would start blowing out cool air instead of warm air. Here are some things that could cause this problem: HVAC Company Lindstrom MN

Your furnace has been on, but you’re still cold. You touch the vent, and to your dismay, you realize that it’s blowing cool air instead of hot air. The problem could be anything from a thermostat problem to a cracked heat exchanger. Here are some possibilities:

  • Your thermostat might be set on “cool” instead of “heat.” If this is the case, you’ll need to reset it before your furnace will start blowing warm air.
  • Your furnace may be in an emergency heat situation. You can tell by touching your vent and feeling whether it’s warm or cold. If it’s cold and the power has been out for a while, you might consider calling a professional to check things out since there could be bigger problems at play here that require immediate attention.
  • Your circuit breaker or fuse could have tripped due to too much heat coming through at once—or there might just be too much electricity running through your system at once (this can happen if more than one appliance is plugged into one outlet). To figure out which one caused this problem, go through each outlet in your house and unplug everything except for what’s absolutely necessary until only one thing remains plugged in; then try turning on your furnace again!

Thermostat is set on “cool” by accident.

If your heating system is blowing out cold air, the most likely cause is that the thermostat is set on “cool.” In order for your furnace to turn on, it must be set to heat and there should be no other conditions preventing it from turning on (such as a dirty cooling coil). If the thermostat has been accidentally bumped or moved from its original setting, this can easily cause the heating system not to operate properly.

To check this first, make sure that your thermostat has been reset properly (for example: if you have a separate room temperature controller or fan controller, make sure those are also set correctly). Then check your furnace inspection tag located near where your furnace was installed in order to verify what type of system you have – this will tell if you need a gas or electric unit as well as whether they have dual fuel capability or not. If none of these steps work then call an HVAC technician because something else may need repaired!

Emergency heat is on.

If you’re seeing emergency heat come on when it’s not freezing outside, here are some things to check:

  • The thermostat may be set incorrectly. Be sure that the temperature is set above 55 degrees, which is the minimum temperature for emergency heat.
  • The furnace filter may need to be changed or cleaned. If your home’s air quality has been compromised by cooking odors or smoke from a fire, an unclean filter can contribute to this problem as well.
  • The electrical connection at your furnace might have become loose or lost its ground connection. In order for your furnace to work properly, it needs both power and a good connection with the ground wire so that all three phases of electricity flow smoothly through it and into your home’s electrical system (if there is no ground wire present).

Circuit breaker is tripped or fuse is blown.

If your furnace is blowing out cold air, it could be that the circuit breaker or fuse that turns on the power to your furnace has been tripped.

Circuit breakers are used to prevent damage to electrical equipment and overheating by cutting off power when a circuit overloads. They can also be reset quickly once they’ve been tripped by flipping the switch back up and down again until you feel it click into place. Fuses are designed to fail safely, preventing fires from occurring in the event of too much current draw on an electrical line; when a fuse blows, you should replace it with one of similar capacity (the number listed on both sides). You can test a blown fuse by using another known good one as a replacement; if this works properly then there’s nothing wrong with your original one but rather something else has caused it to fail (such as an overload).

If you’re having trouble identifying which component is causing your problem or don’t feel comfortable replacing either part yourself then contact us today! We’ll send someone out right away who will fix this issue for you so you can get back inside where it’s warm and cozy while they work their magic!

Dirty filter. HVAC Company Lindstrom MN

How often you should replace your filter depends on the type of furnace you have, but it’s generally a good idea to check the filter every month. If your furnace is blowing out cold air, it may be because there’s a buildup of dust on your filter.

If this sounds like an issue you’re facing (or something that might happen in the future), don’t worry! There are some quick fixes for cleaning your filter: simply vacuum any loose debris from its surface and replace it where it belongs. If there’s still some gunk left behind after vacuuming, try using water to soften up stubborn spots before scrubbing with soap and water or rinsing with a garden hose until clean.

Pilot light went out. HVAC Company Lindstrom MN

Your furnace may have a problem with the pilot light. The pilot light is a small flame that burns constantly to ignite the gas in your furnace. If it goes out, your heat won’t work right and you’ll get cold air blowing out of your vents.

Pilot lights can go out for many reasons, including dirty filters, dust and lint buildup around the burner area, or an electrical problem with your heating system (like loose wiring).

Heat pump isn’t working right (with a heat pump system).

  • If your heat pump isn’t working at all (or if it’s blowing cold air), this is probably a problem with the thermostat. Check to make sure that the thermostat is set to “heat” and not “cool.”
  • If your heat pump is blowing warm air, this could be because of a few different things:
  • The air filter might need replacing.
  • The fan motor may be broken or loose. If you have access to an electrician, they should be able to fix this for you without difficulty.
  • Your furnace needs to be replaced entirely (this is not common).

Blower fan isn’t working (with an electric heat furnace).

If the blower fan isn’t working, it could be due to one of the following:

  • Clogged or dirty blower air filter. A clogged air filter will reduce airflow and cause the furnace fan to work harder. Cleaning or replacing your furnace’s air filter should help resolve this issue.
  • Some motors are more sensitive than others; if your motor is old or has been used for a long time without being replaced, it may have become worn out and need replacing instead of being fixed with parts from your local hardware store.
  • If there is an electrical problem, turning off power at the fuse box before attempting to repair any wiring can prevent injury from occurring while working on the system itself.

Heat exchanger is cracked or broken. HVAC Company Lindstrom MN

If the heat exchanger is cracked or broken, it won’t work properly. The heat exchanger is a metal box that transfers heat from the flame to the air in your home. It’s important to have your heat exchanger checked regularly so you can prevent bigger problems down the road. For example, if a crack isn’t repaired and gets worse over time, it could cause carbon monoxide poisoning or make dangerous fumes into your home during winter months when you’re running your furnace constantly. If your heat exchanger is broken, you will want to contact a professional like True North Heating and Air. We are your local HVAC Company Lindstrom MN and can come assess your HVAC System to see what needs repaired so you can be warm this winter.

There are many reasons why your furnace may be blowing out cold air, but we can help you figure out what’s wrong and fix it quickly.

It’s not always easy to diagnose a problem with your HVAC system. Sometimes it takes a trained technician and some time to figure out what’s wrong and how to fix it. But what if you’re too busy or don’t want to pay for an expensive diagnosis?

What if there was a way to get answers without spending all day tinkering? That’s where we come in! We’ll ask you a few questions, assess the situation and get back with an answer as quickly as possible.


If you think your furnace is blowing out cold air and you’re worried about staying warm this winter, call us today. We’ll be happy to diagnose the problem and give you a free estimate on what it will take to fix or replace it. Contact True North Heating and Air. We are your local HVAC Company Lindstrom MN that can help with your furnace to make sure it is blowing out warm air for your this season. We know how important it is to have heat in the winter here in Minnesota and we want to be the HVAC Company Lindstrom MN to help you make sure you have heat to stay warm. Contact us today!

HVAC Company Lindstrom MN

HVAC Company Lindstrom MN

HVAC Company Lindstrom MN