Overview
Year-round HVAC maintenance guide to keep your heating and cooling system running efficiently, extend equipment life, and maintain healthy indoor air quality.
Gettysburg Checklist

Replace air filter every 1-3 months
DIYCheck monthly during heavy use. Hold up to light — if you can't see through it, replace it.
Schedule professional tune-up twice yearly
AC tune-up in spring, heating tune-up in fall. Includes safety checks, cleaning, and efficiency optimization.
Clean supply and return vents
DIYEasy~45 minVacuum vents and registers. Make sure furniture and drapes don't block airflow. Clean vents improve HVAC efficiency, air quality, and even room temperatures.
Read full guide →Check thermostat calibration
DIYEasy~30 minCompare thermostat reading to a room thermometer. If off by more than 2 degrees F, recalibrate or replace your thermostat for accurate temperature control and energy savings.
Read full guide →Clear area around outdoor condenser unit
DIYRemove debris, trim vegetation back 2 feet. Gently rinse condenser coils with a garden hose.
Inspect ductwork for leaks
DIYModerate~60 minCheck visible ducts in attic and basement for gaps, disconnections, or damaged insulation. Leaky ducts waste 20-30% of conditioned air before it reaches your rooms.
Read full guide →Test CO detector near furnace
DIYPress the test button. Replace batteries annually. Replace the entire unit after 7 years.
Check condensate drain line
DIYEasy~20 minPour a cup of bleach or vinegar down the AC condensate drain to prevent algae clogs. A blocked drain line is the number-one cause of AC shutdowns and water damage.
Read full guide →Local Professionals in Gettysburg

Atlantic Coastal Cooling and Heating, Inc. (ACCH)
Gaithersburg, MD
(301) 216-1945Cool Breeze Plumbing, Heating & A/C
Gaithersburg, MD
(301) 879-3400Sichinava Heating and Air Conditioning
Gaithersburg, MD
(240) 778-7621Potomac HVAC
Gaithersburg, MD
(301) 825-4447Founding Member
Premium spot in Gettysburg
Ambassador
Lead the Gettysburg community
Founding Member
Premium spot in Gettysburg
Gettysburg Housing Market
Median Home Price
$345,000
Homes for Sale
23
Price per Sq Ft
$183
Local Pros
583
Home Service Professionals Near Gettysburg
Median Household Income
$52,656
Median Home Value
$237,000
Median Rent
$929/mo
Homeownership Rate
47.3%
Population
7,929
Median Year Built
1942
Source: U.S. Census Bureau, ACS 2023 5-Year Estimates
Fair Market Rents — Gettysburg
Studio
$1,006/mo
1 Bedroom
$1,099/mo
2 Bedroom
$1,374/mo
3 Bedroom
$1,834/mo
4 Bedroom
$1,939/mo
Source: HUD FY2026 Fair Market Rents — Gettysburg, PA MSA