AC Maintenance in Concord, CA
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 Contra Costa County will get in touch.
Tell us about the job
It takes about a minute.
Four months of hard running, then months of sitting idle
Concord asks a lot of an air conditioner for a short stretch each year. From June through September, with afternoons averaging 85°F, the system runs hard and steady, sometimes for hours at a time. That kind of steady load wears on the capacitor, the contactor, the fan motor, the parts that keep the unit cooling at all.
Then it sits for the rest of the year, barely running. Dust settles on the coil during that quiet stretch, and the refrigerant charge can drift without anyone noticing. A tune-up before the season checks the charge, cleans the coil, and tests the capacitor and contactor while they still work, so the first hot week isn't when you find out one of them doesn't.
- 4 months
- June through September, your air conditioner is on duty
- 85°F
- the average summer afternoon it cools against
- 12 hail events
- in ten years, and hail bends the fins on outdoor coils
- 166 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.
California requires HVAC contractors to hold a state license.
The license is issued to the contractor's business, not to the person who shows up at your door or to this specific job. The state tested them at some point and keeps a record of who they are, so a license number is something you can trace back to a real, accountable business.
For a maintenance visit on your air conditioner, that license is what stands behind the work. If the technician opens the refrigerant side of the system, checking the charge or looking for a leak, federal law also requires them to hold EPA Section 608 certification, the same requirement that applies in every state. Between the two, you have a business the state can identify and a technician certified to handle refrigerant without venting it into the air.
Sources: California Legislative Counsel · Contractors State License Board
- 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 evaporator coil and the condensate drain, since a clogged drain is one of the most common reasons an AC stops cooling. They also check the thermostat calls for cooling correctly and look over the electrical connections. You should change or clean the filter yourself between visits, since that's what protects the coil and keeps air moving through the ducts.
- How often does an air conditioner need maintenance?
- Once a year, ideally before the weather turns warm. Concord only needs cooling from June through September, so a spring check catches anything that needs attention before the unit has to work through summer afternoons that average 85°F. Waiting until the first hot week means finding out about a problem after you already need the AC.
- Is AC maintenance worth it?
- Yes, because most of what causes an AC to fail in summer is the kind of thing a technician catches ahead of time. A dirty coil, a weak capacitor, or a clogged drain line all get worse under load, and they tend to show up on the hottest days when the system runs longest. A yearly check is also when a technician would catch coil damage from hail, which matters here since Concord has seen 12 hail events over the past ten years.