Inspect your furnace thermostat by first making sure that it’s turned on. Also, ensure that the thermostat switch is turned to “heat” and not “cool”. If your furnace will still not start with the thermostat on, try adjusting the temperature settings to a few degrees higher. Inspect any visible wires for breaks or splits, and make sure your thermostat batteries are not dead. Do not touch any open wires; contact a professional.
• Furnace is making more noise because it’s turning on and off more frequently. It may need repair, may not have been sized properly to fit the needs of your house, or may not have the airflow available that it needs from the ducts. The ducts are most often the culprit. Sometimes adding a cold air return can solve this. Ensure your vents are all open. If you are closing off vents in your house this can contribute to the issue.
You can help prevent issues with your system by scheduling routine maintenance on your furnace every year. During a maintenance visit, our technician will inspect and clean your furnace to help the system to run more smoothly and efficiently for the coming winter. You can have it done any time, but the maintenance is typically performed in the fall. Ask about our planned service agreement program!

Moncrief Heating and Air Conditioning has been providing furnace service, repair and installation in the Greater Atlanta area for over 118 years. Area homeowners and businesses have consistently given the Moncrief team 5-star reviews for our outstanding performance and customer service. We service both commercial and residential customers and can provide a wide range of services from a consultation to emergency furnace repair or replacement for new and existing customers throughout the Atlanta, GA area.
Do not try to do DIY gas furnace maintenance or tune-ups yourself. In addition to being dangerous, this may also violate the manufacturer’s warranty. Let properly trained and experienced technical staff perform all gas furnace preventative maintenance. Regardless of your DIY talent, trying DIY furnace maintenance is fraught with hazards and risks to your heating system—and yourself.
Great article! I am having trouble identifying what to use for the aluminum or zinc strips to prevent organic growth and staining. How wide are the strips? Are they predrilled? I am starting to see black stains on the north facing asphalt shingles. Do you recommend treating that befor adding the metal strips? If so, 50/50 bleach and water or a commercial product?

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