7 Reasons Your Furnace Is Blowing Cold Air & Ways To Fix

Several reasons can be responsible for your furnace blowing cold air, but the good thing is that you don’t always need to call a heater repair expert in Arcadia to solve your problem.

Here is a list of a few things you can do before calling a professional to resolve the problem yourself.

Seven Furnace Components You Should Check If Your Furnace Blows Cold Air

1. Damaged Pilot Light

If your furnace is blowing cold air, it may be due to a problem with the ignition system, and your heater is not lighting the fuel. Check the pilot light and if it is out, follow the given steps,

  • Check the instructions in the user manual on igniting the pilot light. Relight it.
  • If you cannot relight the pilot light, check the gas supply and make sure the gas valve is on.

2. Dirty Air Filter

If your furnace’s air filter is covered in dirt, dust, and debris, it will restrict the incoming air from your furnace. Overheating and long heating cycles indicate you should replace the air filter.

3. Low Gas Supply

A furnace blowing cold air may also result from a serious issue with your home’s gas supply line. Your furnace will not work properly and shut down if it does not receive sufficient gas to carry out its job. To solve this problem, you will need to search for HVAC servicing near me and call a professional.

4. Clogged Condensate Lines

Modern furnaces are designed with condensate drain lines that help remove moisture. If the condensate drain is blocked, it will cause the burners to deactivate, and the furnace will blow cold air.

You can clear the blockage in the condensate drain with the help of a plumber’s snake. You can even pour a pan of hot water, vinegar, baking soda, and dish soap to clean the condensate pipe.

5. Damaged Ductwork

Your furnace may start blowing cold air if holes and cracks exist in the ductwork. These openings allow the warm air to escape and cold air to enter the air ducts.

Your furnace may be working properly and producing warm air, but you should call for heater repair in Arcadia to seal the ducts and cover them with insulation

6. Malfunctioning Thermostat

If you find your furnace blowing cold air, check the thermostat and ensure it is set to AUTO. If it is set to ON, your furnace will run even when it produces no heat. 

7. Dirty Flame Detector

If the flame detector is covered in dust and dirt, the furnace will blow cold air as it cannot detect the flame. If it doesn’t detect the flame, it does not start the ignition process. You can solve it by cleaning the flame sensor yourself or calling a professional to do it for you.

It is essential to resolve the furnace problem at the earliest because the issue may evolve into a massive mess as time passes.

If you are searching for HVAC servicing near me, you can call AC Tech Inc and schedule an appointment with our experts for maintenance service. Call (626) 689-8068, and we will work to fix the issue quickly.