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AC Won't Turn On
in Garland, TX
When your AC does nothing when you turn it on, the problem is somewhere in the electrical path from the thermostat to the outdoor unit. This happens more in Garland during the first heat wave of the year, usually in late April or May, when systems that sat idle all winter try to start up under full load. Some causes are simple fixes and some mean a major component has failed.
Quick Answer
An AC that won't start in Garland is often a tripped breaker, a dead capacitor, or a failed thermostat. Check the breaker first. If it tripped, reset it once. If it trips again, stop and call (361) 338-5229 because something in the system is pulling too much power. Do not keep resetting a breaker that keeps tripping.
Telltale Signs
Warning Signs to Watch For
- Thermostat shows a call for cooling but nothing happens
- Outdoor unit is completely silent
- Breaker for the AC is tripped in the electrical panel
- Thermostat screen is blank or unresponsive
- Indoor fan runs but outdoor unit does not start
Root Causes
What Causes AC Won't Turn On?
Failed Run Capacitor
The run capacitor gives the compressor and fan motors the extra push they need to start up. When it fails, the motors hum but cannot turn over. Capacitors fail faster in heat, and Garland's outdoor temperatures above 95°F for 60 or more days a summer shorten their lifespan noticeably.
The Fix
Capacitor Replacement
A technician tests the capacitor with a meter and replaces it if it is out of spec. It is a straightforward swap that takes less than 30 minutes and gets the unit running again.
Tripped Breaker or Blown Fuse
The AC draws a large amount of current when it starts, and if the compressor is struggling or there is a wiring fault, the breaker trips to protect the circuit. In older Garland homes built before 1985, electrical panels sometimes have undersized breakers that trip under normal AC load during peak summer demand.
The Fix
Electrical Inspection and Breaker Repair
The technician finds the reason the breaker tripped before resetting anything. If the panel or wiring is undersized, that gets corrected so the problem does not repeat.
Dead Thermostat or Wiring Fault
If the thermostat loses power or a wire comes loose at the control board, the signal never reaches the outdoor unit. Battery-powered thermostats in Garland homes sometimes simply need new batteries, but low-voltage wiring faults are also common in houses where the thermostat wiring runs through attics that hit 140°F in the summer.
The Fix
Thermostat Replacement or Wiring Repair
The technician checks the low-voltage wiring at the air handler and outdoor unit before replacing the thermostat. A loose wire gets secured. A failed thermostat gets replaced with a compatible unit.
Self-Diagnosis
Which Cause Applies to You?
Check the signs you're observing to narrow down the likely root cause before your inspection.
| What You're Seeing | Failed Run Capacitor | Tripped Breaker or Blown Fuse | Dead Thermostat or Wiring Fault |
|---|---|---|---|
| Outdoor unit hums but doesn't spin | |||
| Breaker was tripped when you checked the panel | |||
| Thermostat screen is blank | |||
| Indoor fan runs but nothing happens outside | |||
| Breaker trips again within minutes of reset |
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