A condenser in Fort Bend County works a schedule that national equipment averages were not written for. Describe what the system is doing and get connected with an independent, TDLR-licensed air conditioning contractor working in the county.
Fort Bend County sits in IECC and ASHRAE Climate Zone 2A — hot and humid, and it stayed there through the 2021 IECC remap that moved Dallas–Fort Worth from 3A into 2A. Houston Hobby records an average first 90°F day of 6 May and an average last of 8 October, with roughly 89 days a year at or above 90°F and 27 at or above 95°F. In 2025 the same station logged 4,099 cooling degree days against 961 heating — a warm year against 1991–2020 normals of 3,362 and 1,098, but the ratio is the point.
What that does to equipment is straightforward. A compressor in Richmond or Rosenberg accumulates far more running hours per calendar year than the identical model in a four-season market, and the parts that fail first are the ones that cycle rather than the ones that sit. The national figure of 10 to 15 years for central air conditioning comes from a 2007 NAHB study of home component life expectancy averaged across every US climate. Locally it lands at the short end, and a system that dies at eleven is not defective — it is on schedule.
Humidity does the rest. A Gulf Coast summer keeps an evaporator coil wet for months at a stretch, which is why the condensate side of a system fails about as often as the electrical side. What Fort Bend does not have is salt-air corrosion. That is a Galveston and Bay Area problem; the county is more than fifty miles inland at its closest point. Any diagnosis that leads with coastal corrosion here was written for somewhere else.
The most common summer failure and the cheapest. Heat degrades it, and a weak one shows up as a compressor that hums without starting, or a system that trips its breaker on start-up.
An electromechanical switch that closes every time the system starts. Where a system may start twenty times a day for five months, the contacts pit and burn.
Runs whenever the compressor does. When it stops, head pressure climbs and the compressor is the next casualty, which makes a fan motor an urgent repair rather than a cosmetic one.
Fins packed with grass clippings, cottonwood and construction dust. The unit is already trying to reject heat into 98°F air; a blocked coil takes away what margin it had.
Low charge is a symptom, not a diagnosis. Adding refrigerant without finding the leak means buying it again next season — and on an R-22 system, at reclaimed-stock prices. See refrigerant and system age.
Not a cooling failure at all until a float switch shuts the system down, which is exactly what it is there to do. In a slab-on-grade house the air handler is usually above a finished ceiling.
A system that cools the air but leaves the house clammy, or that runs in short bursts and never quite settles, is usually not broken. It is usually oversized. In a hot-humid climate a system removes moisture only while it is running, so a unit with more capacity than the house needs satisfies the thermostat quickly, shuts off, and never runs long enough to pull the latent load out of the air. The reading on the wall is fine. The house still feels wrong.
That is worth knowing before a repair conversation turns into a replacement conversation, because the natural instinct — buy a bigger one — makes it worse. Sizing and load calculations covers what actually decides it, and why almost nothing in unincorporated Fort Bend County ever checks that the sizing was done.
Neither is a repair and neither needs a license. The filter. A filter that has not been changed since spring restricts airflow enough to freeze an evaporator coil, and a frozen coil produces warm air at the vents — a symptom that looks exactly like a refrigerant failure from the hallway. The breaker. The air handler and the condenser are usually on separate circuits, so a tripped condenser breaker gives a house that blows air and never cools. A breaker that trips again immediately is not a reset problem; leave it off and say so on the call, because it changes what the contractor brings.
If the indoor coil has frozen, running the system on fan only for a couple of hours will thaw it and often restores cooling temporarily. It does not fix why it froze. Restricted airflow and low charge are the two usual causes, and they call for opposite responses.
Two numbers settle it more reliably than any rule of thumb: the age of the system, and the cost of the repair against the cost of a changeout. Under about eight years almost any repair is worth making. Past twelve, a repair costing a third of a new system rarely is, because the rest of the equipment is the same age as the part that just failed. A compressor or refrigerant-circuit failure on an R-22 system is effectively a replacement decision, since R-22 has been available only as reclaimed stock since production ended in 2020.
Because August is when it is asked for the most. A marginal capacitor, a partly blocked coil or a slightly low charge will carry a system through a mild May afternoon and fail on a 99-degree day when the compressor never gets to stop. The failure is usually months old by the time it becomes visible; the heat only exposes it.
The outdoor fan running does not mean the compressor is running, and neither means the refrigerant circuit is intact. Warm air at the vents with the blower working normally points at the refrigerant side or the compressor rather than at airflow. A frozen indoor coil produces the same symptom from the opposite cause, which is why it gets diagnosed on gauges rather than by guessing.
Fort Bend County has not adopted building codes for single-family residential development in its unincorporated areas, and its own permit list has no mechanical trigger — so a repair, and in most cases a full changeout, involves no county mechanical permit and no county inspection. State licensing is unaffected: the contractor still needs a TDLR air conditioning and refrigeration license wherever the property sits. Inside a city the answer changes, sometimes considerably. See AC permits in Fort Bend County.
Common Houston-area repairs run from a low three-figure capacitor or contactor replacement up into four figures for a compressor or an evaporator coil. What varies most is diagnostic and after-hours pricing, so it is worth asking for the diagnostic fee, the hourly or flat rate, and whether the diagnostic is credited against the repair — before anyone is dispatched.
Describe what the system is doing and roughly how old it is. Getting connected with an independent TDLR-licensed contractor working in Fort Bend County takes one call.
Call (346) 623-3250 Request a Quote
Fort Bend