Contactor Replacement
The contactor is the electrical switch that turns your outdoor unit on and off — when it fails, the whole system can go dead even though the thermostat is calling for cooling.
Signs you need this repair
If you're seeing any of these, it's a strong indicator this is the fix your system needs.
How it's fixed
What a technician actually does during a contactor replacement visit.
Confirm the control signal
The technician verifies that the correct 24-volt signal from the thermostat is actually reaching the contactor coil.
Inspect the contact points
The physical contacts are checked for pitting, burning, or corrosion — visible damage here confirms the contactor is failing.
Test continuity
A continuity test confirms whether the contactor is actually completing the circuit when energized.
Install a matched contactor
The replacement is matched to your system's amperage and coil voltage, wired in, and tested through a full on/off cycle.
Why this is common in Las Vegas
Because Las Vegas AC units cycle on and off constantly during peak summer — often running 12+ hours a day — the contactor's internal contacts endure far more arcing over a season than they would almost anywhere else in the country. Each cycle causes microscopic pitting, and it adds up fast.
Common questions
What's the difference between a contactor and a capacitor problem?
A capacitor issue usually shows up as a fan that hums but won't spin. A contactor issue usually means the outdoor unit doesn't respond at all, or buzzes without starting.
Is a buzzing sound always the contactor?
Not always, but it's one of the most common causes. A technician can confirm it directly rather than guessing from the sound alone.
How long does a contactor typically last in Las Vegas?
Contacts can wear out in as little as 3–5 years in high-cycling Las Vegas systems, compared to longer in milder climates with less continuous run time.
Available across the Las Vegas Valley
This flat rate applies wherever you are in the valley, including Summerlin, Henderson, Spring Valley, and every neighborhood we serve.
Other common repairs
Book your contactor replacement
Tell us a bit about your system and we'll get a technician out — usually same day.
Request received
We'll call you shortly to confirm your appointment window.
Need it sooner? Call 702-335-7141 directly.