How often should an AC be cleaned?
Clean the indoor evaporator coil and the outdoor condenser coil once a year, flush the condensate drain line once a year, and replace the filter every 30 to 60 days in peak season. The blower wheel needs cleaning every 3 to 5 years. In Pearland, the annual spring tune-up covers all of it in one visit.
| Component | How often | Why |
|---|---|---|
| Air filter | Every 30 to 60 days, April to October; 60 to 90 days in winter | Restricted airflow is the first cause of frozen coils |
| Indoor evaporator coil | Once a year | Dust and biofilm cut capacity and breed odor |
| Outdoor condenser coil | Once a year, plus a garden-hose rinse in summer | Grass clippings and cottonwood block heat rejection |
| Condensate drain line | Once a year | Moves 5 to 20 gallons a day in summer; clogs cause water damage |
| Blower wheel | Inspected yearly, cleaned every 3 to 5 years | Caked blades drop airflow and raise amp draw |
| Professional tune-up | Once a year, every spring | Covers every item above with measurements in writing |
Short answer: an AC in Pearland needs a professional cleaning once a year, in the spring before the heat sets in. Each part fouls at its own rate, though, so the schedule depends on which part you mean.
Here is how we break it down, part by part.
Air filter: every 30 to 90 days
Filters load up faster than anything else in the system. A pleated MERV-11 or MERV-13 filter is full in 30 to 60 days during peak cooling season, April to October in Pearland. Off-season, 60 to 90 days is fine. The 1-inch fiberglass filters at the hardware store last longer between changes because they catch less. Everything they miss lands on the indoor coil.
Switch to MERV-11 or MERV-13 media, and change it on a calendar reminder. A clogged filter chokes airflow and wears out everything downstream of it.
Indoor evaporator coil: once a year
In a climate like ours, this is the cleaning that matters most. The evaporator coil sits in cold, wet air every minute the AC runs. Leave it alone and biofilm takes hold within months, and after a couple of years a dirty coil costs you noticeable efficiency.
The spring tune-up takes care of it. The tech measures airflow, applies a no-rinse coil cleaner and lets it work into the fin pack, then measures airflow again. If you skip the full tune-up, standalone coil cleaning runs $150 to $250.
Outdoor condenser coil: once a year minimum
You can see this one get dirty. Grass clippings and leaves collect on the fins, along with pollen, lint from a nearby dryer vent and the grit that washes off South Houston roofs. You can keep this coil mostly clean yourself with a garden hose. Shut the system off first and use low pressure. A pressure washer bends fins permanently. Rinse from the top down.
At the spring tune-up it gets a proper cleaning. We comb out any bent fins, rinse it thoroughly and clear the pad.
Condensate drain line: once a year
Nothing on this list can cost you more if it's skipped. Drain line cleaning takes 30 to 45 minutes and runs $150 to $250 on its own. A clogged drain that backs up into the air handler closet and drips through the ceiling means a drywall repair on top of the AC work.
A yearly flush with an anti-biofilm tablet prevents most clogs. Heat pumps that run year-round do better with drain service twice a year.
Blower wheel: every 3 to 5 years
The blower wheel inside the air handler collects film slowly. Once it's caked it moves a lot less air, but with decent filtration that takes years. The tech inspects it at every annual tune-up and cleans it when it needs it, which in most Pearland homes is around the 3 to 5 year mark.
The full tune-up: once a year, every spring
The annual tune-up covers everything above except filter changes, which you handle between visits, and blower wheel cleaning, which happens when it's due. One 90-minute visit a year keeps the system close to design efficiency. Skip a few years and efficiency slides. Some manufacturer warranties also ask for proof of annual service.
What if my AC has not been cleaned in years?
We see it a lot, especially when someone buys a house and the previous owner's maintenance history is a mystery. Start with a professional AC tune-up with coil cleaning and a drain flush. The tech will tell you whether it needs more (a blower wheel cleaning, a deeper coil treatment) or whether the tune-up brought it back to spec. A system neglected for 3 years can usually be brought back. At 8 years, parts often need replacing.
Coil cleaning, the drain flush and the blower check all happen in one spring visit. Get on the schedule at 281-992-7866 or book online.