AC Maintenance in Cambridge, MD
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 Dorchester County will get in touch.
Tell us about the job
It takes about a minute.
Four months of heat, then eight months of sitting
Your air conditioner in Cambridge earns its keep from June through September, with afternoons averaging 86°F. That is a short, hard season. The unit runs close to flat out for four months, then sits idle the other eight.
That kind of stop and start hides problems. A tune-up before the season checks the refrigerant charge, cleans the coil, and makes sure the capacitor and contactor are still doing their job after months of doing nothing. It is also worth checking the unit over after a bad storm. Dorchester County has logged 58 damaging wind events and 8 hail events in the last ten years, and a unit sitting outside takes the weather straight on.
- 4 months
- June through September, your air conditioner is on duty
- 86°F
- the average summer afternoon it cools against
- 8 hail events
- in ten years, and hail bends the fins on outdoor coils
- 58 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
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- Dec
A tune-up checks the refrigerant charge, cleans the coils, tests the capacitor and tightens the electrical connections.
Maryland requires HVAC contractors to hold a state license.
Maryland licenses HVAC contractors through the Board of Heating, Ventilation, Air Conditioning, and Refrigeration Contractors. The license is issued to the contractor, not to each job, so the same license that covers a full installation is what covers a company sending someone out to maintain your air conditioner.
Maintaining an air conditioner usually means checking refrigerant charge or looking for a leak, and that work needs its own credential on top of the state license. Any technician who opens the refrigerant side of a system, in Maryland or anywhere else, has to hold EPA Section 608 certification. The Maryland license accounts for the business doing the work. The 608 certification accounts for the person handling the refrigerant itself.
Sources: Maryland General Assembly · Maryland Department of Labor
- What does AC maintenance include?
- A technician cleans the condenser coil, checks the refrigerant charge, and tests the capacitor and contactor in the outdoor unit. Inside, they check the coil and the drain line, since a clogged drain line is one of the more common causes of a shutdown in the middle of summer. They also check that the thermostat is calling for cooling correctly and that airflow across the coil is right. Anyone opening the refrigerant side of the system has to hold EPA Section 608 certification, so that part of the check is never optional.
- How often does an air conditioner need maintenance?
- Once a year, before cooling season starts. Cambridge only needs cooling from June through September, so having it checked in spring gives a contractor time to order a part if something needs replacing before the heat sets in. Summer afternoons here average 86°F, and a system that has been skipped a year or two tends to struggle most on the hottest days, right when you need it.
- Is AC maintenance worth it?
- Yes, because most of what causes a system to fail during cooling season is something a technician can catch beforehand. A dirty coil, a weak capacitor, a clogged drain line, these are cheap to deal with ahead of time and expensive to deal with as an emergency call. Cambridge homes only need cooling for about four months of the year, so a single yearly check covers the whole stretch a system has to work.