AC Repair
AC Repair Guide: Common Problems, Diagnostics, and When to Call
When your air conditioning stops working reliably in Houston's summer heat, every hour matters. This guide covers the most common AC problems, what to check yourself, and the clear signs it is time to bring in a licensed technician.
Common AC Problems Houston Homeowners Face
- AC runs but the house will not cool below a certain temperature — often a refrigerant issue or a dirty evaporator coil
- AC blows warm air — could be a tripped breaker, bad capacitor, or low refrigerant
- AC shuts off after a few minutes — the float switch may have tripped from a condensate clog, or the system is short-cycling due to an oversized unit
- Unusual noises (banging, squealing, rattling) — mechanical issues with the fan, motor, or refrigerant lines that worsen quickly without service
- Ice forming on the coils or refrigerant lines — restricted airflow or low refrigerant charge
What You Can Check Before Calling
- Confirm the thermostat is set to COOL, not FAN or HEAT
- Check the air filter — a completely clogged filter causes most cooling capacity complaints
- Reset the circuit breaker if the outdoor unit has no power
- Clear visible debris from around the outdoor condenser unit
- Check the condensate drain pan under the indoor air handler for standing water
Red Flags That Require a Technician
If any of the following are present, stop troubleshooting and call a pro. Attempting DIY repairs on refrigerant, electrical, or capacitor components can cause further damage or create safety hazards.
- Refrigerant leak suspected — sweet or chemical smell near the unit
- Electrical burning smell
- Capacitor or contactor failure (unit hums but does not start)
- Ice on the system after clearing airflow restrictions
- Multiple failed DIY resets with the same result
The Condensate Line Connection
One of the most commonly missed AC repair issues in Houston is the condensate drain line. A clog in this small pipe causes water backup, mold, and often triggers a safety shutoff. If your AC has stopped for no obvious reason, check this first — and read our full article on condensate line clogs for a complete walkthrough.
Need a hand from a licensed technician?
Prevention Is Cheaper Than Repair
Maintenance Avoids Most Common AC Repairs
The majority of AC repair calls — refrigerant leaks, capacitor failures, dirty coils — are preventable with regular maintenance. A seasonal tune-up costs far less than the average repair call and catches problems in the off-season.
When Repair Becomes Replacement
Knowing When to Stop Repairing
A repair is always worth considering. But when a system is over 12 years old and requires a major component repair, the math often favors replacement. We tell you honestly which situation you are in.
AC not cooling the way it should?
Weatherford Air & Heating provides same-day AC repair across Greater Houston. Licensed technicians, upfront pricing, guaranteed workmanship.