Furnace Repair For A Unit Blowing Cold Air
When you first fire up your furnace at the start of the season, it’s normal for cold air to come through the vents until your unit is properly up and running. However, if cold air persists, there could be a serious issue at hand that requires furnace repair.
Before calling for repair, check the settings on your thermostat. A thermostat set to “ON” will continuously push air through your home, regardless of whether the air is heated or not. When it is set to “AUTO,” the fan only engages and moves air when warm.
If you were able to solve the problem with a quick switch of a setting- great! If not, the best way to identify the cause of a furnace blowing cold air is to have a certified professional inspect your system and to perform the necessary furnace repair.
Your furnace blowing cold air could also be the result of something as simple as an extinguished pilot light that needs to be relit; however, an extinguished light could also mean there is a more serious problem. If the pilot light is out, it could be because of a problem with the gas supply; either it’s not flowing at the correct rate or there is a blockage coming into the furnace. If you are able to ignite the pilot light but it goes out again, there is a problem with the thermocouple (a sensor used to measure temperature) and it most likely needs to be repaired or replaced.
Another issue results from dirty or clogged filters that restrict airflow, causing the furnace to work harder than necessary. When the dirty filters aren’t replaced, they can cause serious problems like your unit overheating. An overheated furnace triggers the limit switch (a built in safety feature that kicks on), causing cold air to blow instead of the warm air you’d like. Continually overheating a furnace causes damage to the heat exchanger, which is a costly furnace repair.
For 30 years, Martino HVAC has provided reliable heating and cooling, air quality service and installation to residential, commercial and industrial customers in the Greater Toronto Area and Quinte Regions. We are proud of the service we provide and our commitment to our customers and our community.
If you are having problems with cold air blowing from your furnace, schedule a service call for furnace repair today.