Your HVAC system is the most expensive mechanical system in your home, and climate plays a huge role in how you should maintain it. A system in Phoenix running AC nine months a year has very different needs than one in Minnesota that heats for six months straight.
Why Climate Matters for HVAC Maintenance
In hot, humid climates like the Southeast and Gulf Coast, your air conditioning runs almost constantly from April through October. That means more filter changes, more condensate drain maintenance, and more wear on compressor components. In cold northern climates, the furnace bears the brunt — heat exchangers, ignition systems, and blower motors need regular attention.
Hot Climate Maintenance (Southeast, Southwest, Gulf Coast)
Every 30 days during cooling season:
- Replace or clean air filters — in dusty Southwest climates, you may need to check every 2-3 weeks
- Clear the condensate drain line — pour a cup of vinegar through the drain to prevent algae and clogs
- Check thermostat operation and settings
Every spring (before cooling season):
- Schedule professional AC tune-up — refrigerant levels, coil cleaning, electrical connections
- Clean outdoor condenser unit — remove debris, trim vegetation 2 feet back
- Test the system before you need it — don’t wait for the first 95°F day
Every fall:
- Have the heating system inspected even if you rarely use it
- Check ductwork for leaks — in hot climates, duct leaks in attics waste enormous energy
Cold Climate Maintenance (Midwest, Northeast, Mountain West)
Every 60-90 days during heating season:
- Replace furnace filters — forced air systems circulate more dust during heating
- Check for unusual furnace noises or smells
- Test carbon monoxide detectors monthly
Every fall (before heating season):
- Schedule professional furnace tune-up — heat exchanger inspection is critical for safety
- Bleed radiators if you have hydronic heating
- Inspect chimney and flue for blockages
- Test emergency heat or backup heating system
Every spring:
- Schedule AC tune-up before the rush
- Open registers that were closed during heating season
- Consider a duct cleaning if it’s been 3-5 years
Moderate Climate Maintenance (Pacific Northwest, Mid-Atlantic)
Moderate climates use both heating and cooling but neither as intensively. The key challenge is humidity management.
- Change filters every 60 days year-round
- Schedule two tune-ups per year — one for heating, one for cooling
- Monitor humidity levels — aim for 30-50% relative humidity. Use your HVAC’s dehumidification mode or a standalone dehumidifier
- Clean evaporator coils annually — mold growth is common in humid climates
Universal HVAC Tips
- Never skip filter changes — dirty filters are the #1 cause of HVAC problems and waste 15%+ on energy
- Keep vents and registers unobstructed — don’t place furniture over floor vents
- Invest in a programmable or smart thermostat — proper temperature scheduling saves 10-15% annually
- Seal ductwork — leaky ducts waste 20-30% of conditioned air. Mastic sealant is better than duct tape
- Replace systems over 15 years old — modern systems are 40-60% more efficient
Related Reading
Your lawn needs seasonal care too! Check out Lush Lawns for regional lawn maintenance guides.