AC Maintenance in Herndon, VA
Air conditioners here run from June through September, so May is the time for a tune-up. Tell us about your system, and a licensed contractor who covers Fairfax County will get in touch.
Tell us about the job
It takes about a minute.
Four months of heat, every year, on the same system
Herndon summers push cooling systems hard from June through September. Afternoons average 86°F, and that is the stretch when your air conditioner runs longest and most often. It is also when a weak part is most likely to give out.
A tune-up checks what that heat load stresses most. The refrigerant charge, the condenser coil, and the electrical connections that keep the compressor cycling correctly. Catching a low charge or a dirty coil now means finding it before a hot afternoon does.
- 4 months
- June through September, your air conditioner is on duty
- 86°F
- the average summer afternoon it cools against
- 51 hail events
- in ten years, and hail bends the fins on outdoor coils
- 387 wind events
- in ten years, and wind drives debris into outdoor units
NOAA nClimDiv, 1991–2020 normals
Book your AC tune-up in May, before homes here start needing cooling in June.
- Jan
- Feb
- Mar
- Apr
- May
- Jun
- Jul
- Aug
- Sep
- Oct
- Nov
- Dec
A tune-up checks the refrigerant charge, cleans the coils, tests the capacitor and tightens the electrical connections.
Virginia requires HVAC contractors to hold a state license.
Virginia's Board for Contractors tests the contractor before issuing that license, and the license belongs to the business, not to any single visit. It stays on record with the state across every job the company takes on. Virginia also sets a threshold for small jobs. Work under $1,000 does not require a licensed contractor, so a routine maintenance visit can fall under that line depending on what it ends up costing.
A maintenance visit on an air conditioner often involves checking the refrigerant charge, and any technician who opens the refrigerant side of the system needs EPA Section 608 certification. That rule comes from the federal government. It applies in every state, and it holds whether or not the job needs a Virginia contractor's license.
Sources: Virginia General Assembly · Virginia Department of Professional and Occupational Regulation
- What does AC maintenance include?
- A technician cleans the outdoor coil, checks the refrigerant charge, and tests the capacitor and contactor. They also check airflow across the indoor coil and make sure the condensate drain is clear, since a clogged drain backs up and can shut the system down. Opening the refrigerant side of the system requires EPA 608 certification, so this stays a job for a licensed contractor.
- How often does an air conditioner need maintenance?
- Once a year, in spring before the heat sets in. Here that means getting it done before June, since the system runs hard from June through September with afternoons averaging 86°F. A yearly check catches a weak capacitor or a low charge before it fails on the first hot week.
- Is AC maintenance worth it?
- Yes. Most AC failures trace back to something a technician would have caught, a failing capacitor, a dirty coil, a low charge. Skipping maintenance doesn't spare the system any wear, it just means those problems get found when the air stops blowing cold instead of before. A contractor can look at the specific system and price the visit.