Is Your Gas Furnace Ready for Winter: a Checklist

Brad Smith
Author: Brad Smith

With the arrival of the first cold nights, HVAC companies remind us that it’s time to check the condition of our gas heating system. And for good reason. After all, if you don’t take care of your gas heating now, you may be left without heat in the cold. Gas heating system can serve you reliably for years, but only with regular maintenance and careful seasonal preparation. An inspection is necessary before the start of each season. On the website rmhvacutah.com, you will find the contact details of certified technicians and can leave a request for an inspection or repair of gas heating system.

Is Your Gas Furnace Ready For Winter

What to Check Before Winter

Did you turn on the furnace and seeing that it runs? That’s not enough. You need to make sure that every part of the system is working and safe. Preparing a gas furnace is a comprehensive check that reduces the risk of accidents and saves gas. It helps maintain a stable temperature in your home throughout the winter. Here are the key elements that need to be checked.

Thermostat Condition

The thermostat is an important control element of the heating system. When it malfunctions, the furnace may consume too much gas or heat poorly. Check it by setting it to “heat” mode. Then set the temperature a few degrees above room temperature. If the system does not respond within 1-2 minutes, this indicates that the thermostat has dead batteries or needs calibration. You may want to consider replacing it. Modern models automatically adjust the heating schedule and save up to 10–15% of energy each month.

Clean Filters

Dirty filters are one of the most common causes of gas furnace malfunctions. They restrict airflow and cause the system to work overtime. The condition of the filter should be checked every 1–3 months for dust, lint, and small debris. If the filter looks gray, smells, or leaves a mark on a paper towel, it’s time to replace it.

Tightness of Windows and Doors

Close all windows, turn off fans, and hold a candle or lit match to the edges of the frame – if the flame flickers, you have an air leak. Use weatherstripping and thermal insulation film on windows, as they can reduce heat loss by up to 20%. Also, check that furniture is not blocking ventilation grilles.

Tightness Of Windows And Doors

Noises Coming from the Furnace

Squeaking, whistling, or humming are not just “operating noises.” They often signal worn fan bearings or motor problems. If the noise is recurring or getting worse, don’t ignore it – schedule a furnace tune-up. The sooner you do it, the cheaper the repair will be.

The Operation of Safety and Carbon Dioxide Sensors

Make sure all sensors are working and have new batteries. This is the simplest but most important checkpoint. Consider installing a combined CO + Smoke Detector. Modern models provide early warning and operate for up to 10 years without replacing batteries.

Condition of Burners and Combustion Chamber

Clogged burners reduce efficiency and can cause uneven gas combustion. This not only increases operating costs but also creates a safety risk. Visually inspect the condition of the flame (it should be blue, not yellow). Check for corrosion or carbon deposits, as well as the tightness of the connections.

Fan and Air Blower Operation

If the fan is unstable, the system will not be able to distribute warm air evenly. It is better to identify such problems before winter, rather than when it is freezing outside.

Fan And Air Blower Operation

Condition of Electrical Connections and Automation

Even gas systems have electronic components. These include the igniter, safety sensors, and controllers. Make sure all contacts are clean and tight. Assess the condition of the ignition element and check that the furnace starts correctly.

When to Call a Specialist

A visual inspection on your own is a good start. But you can’t do everything yourself. Full maintenance is impossible without special equipment. Especially if you suspect a malfunction. Call a technician and don’t wait until the furnace breaks down completely. Schedule an inspection even if everything is working, but you have not performed preventive maintenance for more than a year. Remember that regular service and timely repairs extend the life of the system and ensure stable heat in your home.