Nothing is more frustrating than turning up the heat and feeling cold air from your vents, so learn the most
common reasons your furnace is blowing cold air and when to call for furnace repair in Baltimore or
heating repair in Maryland.
Before you panic, know that a furnace blowing cold air is often caused by something simple. Start at the
thermostat and make sure the fan is set to auto rather than on, because the on setting pushes air through
the ducts even when the burners are not firing, which feels cold. Next, check your air filter, since a clogged
filter restricts airflow, causes the furnace to overheat, and triggers a safety shutoff that leaves the blower
running without heat. A dirty flame sensor is another frequent culprit, because when it is coated in soot the
furnace cannot confirm that the burner is lit and shuts the gas valve. If you have a gas furnace, also
confirm the pilot light is on or the ignitor is glowing, and make sure the gas supply valve is open. Finally,
leaky or disconnected ductwork can let heated air escape into attic or crawlspace areas before it ever
reaches your rooms. If these quick checks do not restore warm air, do not keep resetting the system. Call
Five Star HVAC at +1 (240) 210-7032 and let our technicians find the cause and get your home warm
again
