How to Prepare Your HVAC System for Winter

October 16, 2025

As winter approaches, making sure your heating, ventilation, and air conditioning (HVAC) system is ready is essential. A properly maintained system keeps your home comfortable, saves energy, and helps avoid costly repairs when the cold hits hardest. At Custom Cooling & Heating, we provide heating and cooling design, installation, and service in Lincoln, Nebraska and the surrounding area. 


Here’s how you can get your HVAC ready for winter — and why choosing a reliable local HVAC company matters. 


1. Schedule a Professional Tune-Up 

One of the most important steps is to have a technician inspect and tune up your HVAC system before the cold sets in. A professional winter check can include: 



  • Inspecting and cleaning the furnace or heat exchanger 
  • Checking the blower motor, belts, and bearings 
  • Testing safety controls, pilot light (if applicable), and gas connections 
  • Verifying thermostat calibration and settings 


This helps ensure your system runs efficiently and safely when you need it the most. 


2. Replace or Clean Air Filters 

Clogged filters restrict airflow and force your system to work harder, increasing energy costs and wear. For winter: 


  • Replace disposable filters or clean reusable filters 
  • Use high-quality filters (like pleated or HEPA, if compatible) 
  • Check filters monthly since heating systems run continuously 


This small step often yields big energy savings and better indoor air quality. 

New at Custom Cooling & Heating: You can now order filters online directly through our website. It’s a quick, hassle-free way to stay on top of filter changes and keep your system running smoothly. You can even save 10% when you turn on Auto Delivery!

3. Clean Vents, Registers & Air Ducts 

Your system’s ability to distribute heat depends on clean, clear ductwork: 


  • Vacuum and dust supply vents and return registers 
  • Ensure furniture, rugs, or curtains don’t block vents 
  • Inspect visible ductwork for loose connections or leaks 
  • Consider professional duct cleaning if you notice buildup or weak airflow 


Clean ducts help your heated air reach rooms evenly and reduce strain on your furnace. 


4. Upgrade or Program Your Thermostat 

A well-set thermostat can significantly reduce heating bills: 


  • Program lower temperatures during sleeping or away times 
  • Consider a smart thermostat to allow automation and remote control 
  • Avoid drastic temperature swings, gradual changes are easier for the system 


A good thermostat reduces unnecessary on/off cycling of your heating equipment. 


5. Inspect and Seal Ductwork & Home Envelope 

Leaky ductwork or poor insulation can waste a lot of heat: 


  • Seal gaps or holes in duct seams using foil-backed mastic or metal tape 
  • Check attic, walls, and crawl spaces for insulation gaps 
  • Seal air leaks around windows, doors, and utility penetrations 


Minimizing thermal losses means your HVAC system can work less to maintain comfort. 


6. Protect Outdoor Components & Shut Down AC 

Though your air conditioner won’t run in winter, its outdoor portion should still be protected: 


  • Clear debris, leaves, and snow from the area 
  • If applicable, turn off the dedicated AC circuit or cover the unit carefully 
  • Keep outdoor equipment out of harm’s way from ice, falling branches, or extreme elements 


This helps prevent damage when spring returns and your system switches back to cooling. 


7. Test Carbon Monoxide and Smoke Detectors 

Heating systems, especially gas furnaces, can pose serious hazards if components fail: 


  • Replace batteries and test smoke detectors 
  • Test carbon monoxide (CO) detectors near bedrooms and near your furnace 
  • Ensure proper ventilation and that flues or chimneys are clear 


Safety checks are as important as efficiency checks in preparing for winter. 


Why Trust Custom Cooling & Heating for Your Winter Prep 

Choosing a trusted local HVAC company ensures the work is done right the first time. At Custom Cooling & Heating, we: 



Our team is local, reliable, and ready to help your system perform well all winter long. 


Final Thoughts 

Preparing your HVAC system for winter isn’t just a nice-to-do, it’s a must. A thorough tune-up, clean filters, sealed ducts, a smart thermostat, and safety checks all work together to: 


  • Improve comfort 
  • Lower utility bills 
  • Extend equipment life 
  • Prevent breakdowns when it’s coldest 


Don’t wait until the first deep freeze. Contact Custom Cooling & Heating today to schedule your pre-winter HVAC inspection, and don’t forget to order your filters online to keep your system at peak performance all season long. 

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