The How-to Guide: Preparing Your Furnace for the Winter Season in Westminster


As the colder months approach in Orange County, Inland Empire and surrounding area, it’s essential to ensure that your furnace is in good working order to keep your home warm and comfortable throughout the winter season. Prepping your furnace ahead of time can help prevent unexpected breakdowns, improve energy efficiency, and save you money on heating costs. As trusted HVAC contractors in Orange County, Inland Empire and surrounding area, we at Absolute Airflow Air Conditioning, Heating and Plumbing have the knowledge and experience to guide you through the furnace preparation process.

Here, we’ll explore essential steps to prepare your furnace for the winter season, including necessary maintenance, safety measures, and energy-saving tips. By following these recommendations, you’ll be on your way to enjoying a cozy and worry-free winter in your Westminster home. Trust our professionals to help you maintain a well-functioning furnace to keep your family warm during the colder months.

Schedule a Professional Furnace Inspection and Service

The first step in preparing your furnace for the winter season is to schedule a professional inspection and service. Our licensed HVAC technicians will thoroughly examine your unit, identify any potential issues, and perform necessary adjustments and repairs. Here are some tasks that a professional inspection and service may include:

1. Inspecting and cleaning the heat exchanger, burners, and blower motor to ensure efficient operations.
2. Checking the ignition system, control board, and safety controls to ensure reliable start-up and performance.
3. Adjust the burner flame and gas pressure to guarantee proper combustion.
4. Lubricating moving parts such as motor bearings and inspecting fan belts for wear or damage.
5. Checking and sealing ductwork to minimize heat loss and improve energy efficiency.

Replace or Clean the Furnace Filter Regularly

A clean furnace filter is essential for optimal furnace performance. A clogged or dirty filter can restrict airflow, forcing your furnace to work harder and consume more energy. Additionally, a dirty filter can contribute to poor indoor air quality, which may aggravate allergies or respiratory issues. Here’s how to replace or clean your furnace filter:

1. Locate the filter compartment in your furnace, which is typically near the return air duct or blower motor.
2. Remove the old filter and examine it for dirt or blockage. If it’s disposable, replace it with a new filter of the same size and type. If the filter is reusable, clean it according to the manufacturer’s instructions.
3. Ensure the filter is properly seated in its designated location and that the arrows on the filter’s frame are pointing in the direction of airflow.
4. Check and replace or clean your filter at least once every three months or more frequently if you have pets or allergy concerns.

Clear the Area Around Your Furnace

Create a clear and safe space around your furnace to ensure proper airflow and prevent fire hazards. Remove any clutter, debris, or flammable materials and maintain at least a two- to three-foot clearance around your unit. Additionally, keep vents and registers throughout your home free of obstructions like furniture and rugs to facilitate proper air circulation.

Test and Adjust the Thermostat

A well-functioning thermostat is vital for maintaining a comfortable and energy-efficient home during the winter season. Test your thermostat to ensure accurate and responsive performance:

1. Switch your thermostat to heating mode and set the temperature a few degrees above the current room temperature.
2. Listen for the furnace to start up, and ensure warm air circulates through the vents.
3. If your thermostat is unresponsive or inaccurate, consider replacing or upgrading to a programmable or smart thermostat for improved energy efficiency and convenience.

Check and Maintain Carbon Monoxide Detectors

The proper functioning of carbon monoxide (CO) detectors is crucial for ensuring the safety of your family during the heating season. Furnace malfunctions can lead to dangerous levels of CO, an odorless and colorless gas that can cause severe health issues or even death. Take the following measures to ensure the effectiveness of your CO detectors:

1. Test each CO detector in your home by pressing the test button and listening for the alarm to sound.
2. Replace batteries in battery-operated detectors or ensure hardwired detectors are receiving power.
3. If your home doesn’t have a CO detector near your furnace or sleeping areas, install one immediately. Ideally, place a detector on every level of your home.
4. Familiarize yourself with the symptoms of carbon monoxide poisoning, such as dizziness, headache, and nausea, to take prompt action if needed.

Insulate and Seal Your Home

Prevent heat loss and improve your furnace’s efficiency by insulating and sealing your home. Invest in proper attic insulation, weatherstripping around windows and doors, and sealing any gaps or cracks in your home’s envelope. This effort will decrease your heating costs and ensure a comfortable living environment throughout the winter season.

By following these essential steps to prepare your furnace for the winter season in Orange County, Inland Empire and surrounding area, you’ll enjoy a warm, comfortable, and energy-efficient home. Remember that regular maintenance and timely repairs are crucial to the longevity and reliability of your heating system. Partner with Westminster’s trusted HVAC contractor, Absolute Airflow Air Conditioning, Heating and Plumbing, to ensure the best care for your furnace throughout the colder months.


In conclusion, preparing your furnace for the winter season is crucial for maintaining a comfortable, safe, and energy-efficient home in Orange County, Inland Empire and surrounding area. By following this comprehensive how-to guide, you’ll be well-equipped to tackle essential furnace maintenance tasks and ensure optimal performance throughout the colder months.

When it comes to professional furnace inspections, services, and repairs, trust Absolute Airflow Air Conditioning, Heating and Plumbing, your reliable HVAC contractor in Westminster. Our team of experienced technicians will work diligently to guarantee your furnace operates at peak efficiency, keeping your family warm and comfortable all winter long.