There could be a number of reasons why your Furnace is blowing cold air. Here are 4 most common reasons and how to tackle the situation. Spoilers, you might not need to call an HVAC technician –
4 Reasons Why Your Furnace Is Blowing Cold Air
1. Your Thermostat is Turned On
2. Furnace Fuel is Low or Out of Fuel
3. Non-Functioning Furnace Ignition
4. Restricted Airflow Because of Dirty Air Filter
Read the detailed article here – 4 Reasons Why Your Furnace Is Blowing Cold Air & How to Repair It in Dallas
By the way, are you looking for an HVAC system for your home?