Sparking or Arcing AC Unit, Georgetown TX Emergency
Sparking, arcing, or a burning electrical smell from HVAC equipment is a fire hazard requiring immediate shutdown. Do not operate the system until an HVAC technician has diagnosed the electrical fault. Call us for same-day emergency service. Some callers mention they noticed the smell or sound days earlier and hoped it would pass, with an electrical fault like this, that gap is exactly when the risk is highest.
Flip the AC circuit breaker to OFF at your electrical panel
If sparking or smoke continues, call 911, potential wiring fire
Do not attempt to open the unit or investigate the source yourself
Call ProAir Georgetown at (512) 798-8094 for same-day electrical diagnosis
Frequently Asked Questions
What Makes Sparking a True Emergency
Sparking is different from most AC complaints because the failure mode itself is dangerous, not just the loss of cooling. Electrical arcing happens when current jumps a small gap instead of flowing through the intended conductor, and that jump releases enough heat to ionize the air around it and throw off molten metal. Inside a contactor, this usually starts as pitting on the contact points from years of normal switching, then progresses to visible arcing as the pits deepen and the gap grows unstable. Inside a compressor, arcing means the winding insulation has broken down enough that current is jumping to the steel housing, which is a failure that will not self-correct and will only worsen with continued operation.
Because the outdoor unit sits close to fences, mulch beds, and in many Georgetown yards, wood decking, we treat any sparking report as a same-day dispatch regardless of time of day. Do not spray water on the unit or attempt to inspect it with the breaker on. Wait for a technician with a lockout procedure and the right meters to confirm the circuit is fully de-energized before opening any panel.
Common causes: a failed contactor with arcing contacts, a compressor with shorted windings arcing to ground, a capacitor in the process of failing with internal arcing, loose or deteriorated wiring at the electrical disconnect or contactor terminals. All require immediate diagnosis, arcing that reaches combustible materials causes fires.
Turn the system off at the thermostat immediately. Then flip the AC circuit breaker to OFF at your electrical panel. If sparking continues after the breaker is off, call 911, there may be a wiring fault between the panel and the unit. Do not attempt to open the unit yourself.
Contactor replacement (most common cause): $125-$200. Capacitor replacement: $85-$150. Compressor replacement (if windings shorted): $1,200-$2,500. Wiring repairs: $150-$400. We provide a written estimate after safe diagnosis before any work proceeds.
Yes. Arcing inside the outdoor disconnect or contactor throws molten metal droplets that can ignite dry grass, mulch, or leaf litter around the condenser pad, and arcing inside the unit itself can ignite wire insulation or the compressor's own oil. This is why we treat any report of visible sparking as an immediate shut-it-down call, not a schedule-it-for-tomorrow repair.
Most homeowners policies cover fire and smoke damage regardless of the ignition source, but they typically exclude the cost of repairing or replacing the failed HVAC component itself. Keep our diagnostic report and any parts we replace as documentation if you need to file a claim.