How to Maintain Your HVAC System Year-Round

A well-maintained heating and cooling system saves energy, lasts longer, and delivers cleaner, healthier air. Below is Duramax Heating & Cooling Inc.’s month-by-month guide—split into four easy seasons—so Portland-metro homeowners and property managers can keep comfort costs in check.

Spring: Prep for Cooling Season

TaskWhy It MattersReplace or Wash Air FiltersA clean filter can improve efficiency by up to 15 %. [ENERGY STAR]Hose Off Outdoor Condenser CoilsPollen and winter debris reduce heat transfer.Check the Thermostat ScheduleSwitch from heating to cooling setpoints (≈ 74 °F daytime).Book a Pro Tune-UpA Duramax tech checks refrigerant, motors, and safety controls. Schedule here

Pro Tip: Keep a two-foot clearance around the outdoor unit—no planters, no grass clippings, no problem.

Summer: Keep Cool Air Flowing

• Inspect Insulation on Refrigerant Lines. Replace any sun-damaged foam to prevent efficiency loss.

• Rinse Reusable Filters Monthly. Portland’s wildfire smoke can clog them fast.

• Listen for Odd Noises. Grinding or clicking = time for a service call.

• Clean Indoor Supply Vents. Dust buildup restricts airflow and spreads allergens.

If the A/C still struggles, request a same-day Duramax diagnostic. We stock 90 % of parts on our trucks for one-visit fixes.

Fall: Get Ready for Heating Season

DIY ActionHow OftenLinksVacuum furnace cabinet & burner areaOnce—Change thermostat batteriesAnnually—Test carbon-monoxide detectorsMonthlyEPA CO GuideSchedule a furnace safety checkEvery fallBook Now

Why call a pro? A cracked heat exchanger or blocked flue can leak CO—a certified Duramax tech spots these hazards before winter hits.

Winter: Protect Your System & Your Wallet

• Keep Vents Open. Closing registers can raise static pressure and strain the blower motor.

• Change Filters Every 30 Days. Holiday cooking and extra guests add particulates.

• Check Outdoor Unit After Storms. Clear snow or ice away from heat-pump coils.

• Monitor Utility Bills. A sudden spike often means the system is short-cycling or low on refrigerant.

For 24/7 emergency heat, call (503) 969-3432—Duramax dispatch answers day or night.

Why Routine Maintenance Pays Off

According to the U.S. Department of Energy, regular HVAC upkeep can cut energy use by 20–30 %. [DOE] Other benefits include:

• Longer Equipment Life – Fewer breakdowns, delayed replacements.

• Cleaner Indoor Air – Less dust, pollen, and mold circulation.

• Valid Manufacturer Warranties – Many brands require annual service.

• Higher Home Value – Up-to-date maintenance records impress buyers.

Quick FAQ

How often should filters be replaced?
Every 90 days for pleated filters, 30 days for fiberglass, or according to the manufacturer’s specs.

Can I hose down my outdoor unit?
Yes—power off first, then gently spray fins from inside-out to avoid bending them.

Does DIY maintenance void warranties?
Changing filters and cleaning coils is fine, but refrigerant work and electrical repairs must be handled by an EPA-licensed pro like Duramax.

Time for Professional Service?

If you’re due for a seasonal tune-up—or your system’s showing warning signs—contact Duramax today:

• Call / Text: (503) 969-3432

• Online Form: duramaxhvac.com/contact

Our NATE-certified technicians keep Portland homes and businesses comfortable, efficient, and worry-free year-round.