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Diagnosing the Mystery: Exploring Possible Causes for Your Furnace Blowing Cold Air

When your furnace starts blowing cold air instead of the cozy warmth you expect, it can be quite frustrating. However, fear not! This article will look into the possible causes of this issue and provide you with a comprehensive guide to address the problem.

1.    Pilot Light or Igniter Issues

A malfunctioning pilot light or faulty igniter can prevent your furnace from igniting, resulting in cold air. Check if the pilot light is lit. If not, follow the manufacturer’s instructions to relight it.
If the pilot light is lit, but the furnace still blows cold air, the igniter might be the culprit. Consider calling a professional to inspect and replace it if necessary.

2.    Gas Supply Issues

Ensure that the gas valve connected to your furnace is open. If it’s closed, open it and wait a few minutes to allow the gas to flow properly. If you experience a gas leak, evacuate your home immediately and contact your gas company or emergency services. Gas-related issues should always be handled by professionals.

3.    Malfunctioning Blower Motor or Limit Switch

A malfunctioning blower motor or faulty limit switch can disrupt warm air distribution. Listen for unusual noises coming from the furnace. If you suspect an issue with these components, it’s best to consult an HVAC technician to diagnose and repair the problem.

4.    Blower Motor or Limit Switch Malfunction

A malfunctioning blower motor or a faulty limit switch can disrupt warm air distribution. Listen for unusual noises coming from the blower motor and inspect the limit switch for any signs of damage. If you suspect these components are causing the problem, it’s best to consult a professional for repairs or replacements.

5.    Incorrect Thermostat Settings

Sometimes, your thermostat might be the problem. Ensure the temperature is set appropriately and the fan mode is “auto” instead of “on.” Simple adjustments to the thermostat settings may quickly resolve the issue and bring back the warm air you desire.

Don’t let a faulty furnace ruin your home warming experience. Since furnace services require expert services, contact Gervais Mechanical Services LLC to schedule furnace inspection services. Our HVAC technicians have more than 100 years of combined experience, so you
can trust our services to restore your home warming needs.

Questions? Contact Us.

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