Why is My Heater Blowing Cold Air?

Compared to some other Californian towns, Simi Valley has pretty mild winters, most of which have bright and sunny days. When the sun goes down and the temperature dips, you know you need a reliable heater to stay warm. So how come your heating system is blowing out cold air when you turn it on? Let’s start with the basics.

Adjust the Thermostat

In most cases, the thermostat is the main culprit of a chilly home. Modern thermostats have two fan settings: auto and on. When the thermostat fan is set to “on,” it will circulate air continuously regardless of whether the heater is running or not. This will push cool air through the vents.

Simply adjust the thermostat fan setting to “auto,” and you’ll no longer feel cool air being pumped into the room.

Also, consider the following questions:

  • Does your thermostat run on batteries? If so, check to make sure the batteries are not weak or dead.
  • Do you own a programmable thermostat? It’s possible that your thermostat is programmed incorrectly or accidentally adjusted.
  • Is someone going behind your back and changing the thermostat temperature when you’re not looking? It happens more than you realize!

Change the Air Filter

When’s the last time you changed your air filters? If the answer is last season, last year, or, worst of all, unknown, it’s time to take care of this small maintenance task ASAP!

Air filters perform the important function of trapping dust and debris from entering the heater, keeping the internal working mechanisms clean and efficient. Over time, the air filter will get saturated with pollutants and block the airflow. If the warm air is trapped inside your heater, the system can overheat and automatically shut down to prevent further damage. Ultimately, your heater will stop working and give you the cold shoulder.

Bottom line: Change your air filters as directed! Seriously! Standard filters are included with our bi-annual maintenance.

Check the Breaker

Whether your heater runs on gas, oil, or electricity doesn’t matter — all heating systems need to be plugged in to actually work. Therefore, a tripped circuit breaker can shut down the system and leave you freezing cold. Thankfully, this is an easy fix!

Do keep in mind that if your circuit breaker trips too often, you may have an electrical issue that needs inspecting. Luckily, we handle both HVAC and electrical services for you!

Are all of the above factors working just fine? Then, it’s time to consider other options.

You’ve Got a Leak

Most homes do, actually! Studies have shown that between 20 to 40 percent of heat is lost in the air duct system. This occurs when the ducts have small openings that allow air to leak out. Follow these steps to check for a duct leak, then call an expert HVAC technician to perform a professional inspection if you suspect something is wrong.


The Pilot Light Shut Off

Almost every furnace has a pilot light, which is essentially the flame used to ignite the burners that kickstart the heating cycle. If this light were to go out, your furnace would not be able to produce heat. It should actually completely shut down to prevent gas from filling up the system and leaking into the room.

Relighting a pilot light is pretty simple if you know your way around a furnace. All you have to do is

  • Turn the furnace off.
  • Turn the pilot light reset switch to “off.”
  • Wait a few minutes.
  • Turn the pilot light reset switch to “pilot” and, while pressing down, use a lighter to reignite the pilot light flame.
  • Turn the pilot light reset switch to “on.”
  • Turn the furnace on.

However, if you do not have experience with HVAC systems or you’re not comfortable igniting the pilot light yourself, do not attempt this!

RR Electric, Heating & Air has trained professionals who are more than happy to assist you with such a task. All you have to do is call and ask!

There’s an Internal Issue

Not all problems are as easy to diagnose as a broken thermostat or a nosy family member jeopardizing everyone else’s comfort. Sometimes, your best option is to call for professional help.

Luckily, your friends at RR Electric, Heating & Air are available for heating repairs, replacements, and maintenance in the Simi Valley area and beyond. Contact us today for more information.