How much does it cost to replace an AC contactor?
How much does it cost to replace an AC contactor?
$200 – $450 average total cost (part + labor)
AC contactor replacement cost
AC contactor replacement costs $200 to $450 on average, including the part and labor. Prices for the part alone range from $20 to $100+, depending on the brand and capacity. The contactor controls the flow of electricity to specific components in the system, switching the air conditioner on or off based on signals from the thermostat.
| Factor | Average cost |
|---|---|
| AC contactor part | $20 – $100 |
| Labor | $180 – $350 |
| Total cost | $200 – $450 |
AC contactor replacement cost factors
The following factors impact the cost to replace a faulty AC contactor:
AC unit size: Replacement parts for larger AC units typically cost more.
Brand vs. generic: Generic replacement parts cost less than brand-name parts but may void the manufacturer's warranty.
Warranty: The manufacturer's warranty may cover the cost of the replacement AC contactor part. However, most warranties do not cover labor costs.
Home warranty plan: Some home warranties cover the HVAC system, but you may be responsible for paying a service call fee.
Season: AC repairs are often cheaper in the early spring or late fall when demand is lower.
Other parts & repairs: Additional HVAC repairs cost $150 to $450 on average, depending on the part and location.
Labor cost to replace an AC contactor
The average labor cost to replace an AC contactor ranges from $180 to $350. Many HVAC companies charge a $75 to $200 service call fee to diagnose the problem, but some companies apply this amount toward the repair cost.
In general, AC repair technicians charge $75 to $150 per hour for labor during regular business hours and $160 to $250+ per hour for emergency repairs on nights, weekends, and holidays.
| Fee type | Average cost |
|---|---|
| AC contactor replacement labor | $180 – $350 |
| Service call / diagnostic fee | $75 – $200 |
| Standard hourly rate | $75 – $150 |
| Emergency hourly rate | $160 – $250+ |
AC contactor failure symptoms
If you notice any of these symptoms, your AC contactor may be failing:
AC condenser unit won't turn on
AC continues to run even when turned off
Chattering noises from the outdoor unit
Buzzing or humming noises from the outdoor unit
Charred, pitted, or melted contactor casing
AC contactor FAQs
What is an AC contactor?
An AC contactor is an electrical component used in heating, ventilation, and air conditioning (HVAC) systems. The contactor acts as a switch to control the flow of electricity to the air conditioner's compressor and condenser. When the thermostat signals for cooling, it energizes the contactor, which then closes its contacts to allow power to flow to these components.
Where can I buy an AC contactor?
You can purchase an AC contactor from HVAC supply stores, home improvement centers like Home Depot or Lowe's, electrical supply stores, online retailers, or directly from HVAC equipment manufacturers.
Are all AC contactors the same?
No, AC contactors are not all the same. They vary in several ways:
Voltage ratings (e.g., 24V, 120V, 240V)
Amperage ratings
Number of poles
Physical size and mounting options
Brand and quality
Additional features like auxiliary contacts
It's important to choose a contactor that matches your specific AC unit's requirements, as using an incorrect contactor can void the warranty and may damage your HVAC system. Check the manufacturer's specifications or hire a professional HVAC technician to handle the replacement.
How long do AC contactors last?
AC contactors last 10 to 15 years on average, depending on the usage, environmental factors, and whether the system receives regular maintenance.
How long does it take to replace an AC contactor?
AC contactor replacement takes about 30 minutes to an hour for a professional HVAC technician. For a homeowner with some electrical experience, it may take 1 to 2 hours. However, it's generally recommended to have a professional handle this task due to the risks associated with working with electrical components.
Getting estimates from AC repair companies
Follow these tips when choosing an AC repair company near you:
Compare quotes from at least three HVAC companies.
Look for a NATE-certified technician with experience repairing air conditioners.
Read AC repair company reviews on HomeGuide and Google.
Select companies that are licensed, insured, and have been in business for 5+ years.
Confirm whether the AC manufacturer's warranty covers replacing the contactor part.
Get a detailed estimate, contract, and warranty in writing.
Questions to ask HVAC repair technicians
Ask HVAC repair techs these important questions to ensure you hire the best company for the job:
How long have you been repairing air conditioners?
Are you NATE certified?
Do you charge a diagnostic or service call fee? If yes, do you apply that fee to the repair cost?
Is the contactor covered under warranty?
Does the estimate include the replacement part and labor?
What other costs should I expect?
How long will the repairs take?
Is the new part also covered by a warranty? If yes, how long is the warranty, and what does it include?
Are you licensed, insured, and bonded?
What is your payment schedule?
Using our proprietary cost database, in-depth research, and collaboration with industry experts, we deliver accurate, up-to-date pricing and insights you can trust, every time.