Check The Basics
If your furnace is running but the vents feel cool, start with the simple things. Make sure the thermostat is set to Heat and the temperature is set above the current room reading. Check that the fan setting is on Auto instead of On, since On can keep the blower moving air even when the burners are not firing. If you recently changed the air filter, confirm it is installed correctly and not blocked.
Look For Easy Clues
In Longmont homes, cold air from a furnace often points to a heating cycle that is being interrupted. A dirty filter, a tripped breaker, an extinguished pilot light, or a safety switch can all stop the furnace from producing heat. If the furnace starts, then shuts down quickly, listen for unusual clicking or repeated starting and stopping. Those clues can help a technician focus on the problem faster.
When To Call
If the furnace keeps blowing cool air after the basic checks, it is time to have it looked at. Repeated shutdowns, odd smells, or a furnace that will not stay lit usually need professional furnace repair. Pine Hollow HVAC helps homeowners in Longmont and Boulder County get to the root of the issue so the system can heat the home the way it should.
