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You need Contactor HN51KC024 if you're having trouble with the compressor or fan motor on your air conditioner, furnace, heat pump, or air handler. This genuine OEM single-pole, 24-volt coil contactor has a full load amps (FLA) rating of 30 amps and a locked rotor amps (LRA) rating of 150 amps.

Contactor, 25 amp, 1-pole, 24 vac 60/50 hz coil

Contactor, 2 pole, 30 amp, 24 vac **Special Note** This may replace single pole contactor and require a technican to install (based on model #)

Fan relay, 24v coil, 50-60hz, spst-no/nc

Contactor with shunt, 1 pole, 30 amps, 24 volts

Contactor 24 volt coil, 30 FLA, Two Pole

Contactor, 24 volts, 30 amps, 1pole

Pressure Switch, 2 stage

Pressure Switch

Safety float switch

Rollout switch, 210f

Switch-interlock

24 Volt 1 Pole 40 Amp

Fan rly dpdt, 24 vac coil

Pressure switch -.65" wc spst 1/4" barb connection
Air conditioner switches—including contactors, thermostats, selector switches, and power switches—are the backbone of your cooling system's electrical control. When your unit won't power on, won't respond to thermostat changes, or cycles erratically, a faulty switch is often the problem. These switches handle high electrical loads and wear out over time, especially in units running during peak summer heat.
We stock genuine replacement switches for Carrier, Bryant, Payne, Goodman, Samsung, LG, Frigidaire, and every other major brand in our catalog. Browse our air conditioner switch parts to find the exact contactor, selector, or thermostat switch your model requires.
Find your part: Enter your air conditioner model number above to locate the correct switch assembly.
Switches control everything from power delivery to temperature sensing. Here's what you need to know.
A contactor is an electrical relay that turns the compressor and condenser fan motor on and off based on signals from your thermostat. A selector switch lets you choose between cooling, heating (if available), and off modes. Both can fail independently, but a faulty contactor is more likely to prevent your AC from starting entirely.
Listen for a clicking sound when you adjust the thermostat—this indicates the contactor is trying to engage. If you hear repeated clicking with no compressor start, the contactor coil is weak or the contacts are burned. A humming unit that won't cool suggests a stuck selector switch preventing the compressor from receiving power. Visual inspection may show pitting or burned contacts inside the switch housing.
While some switches share similar specifications across brands, most air conditioners use model-specific or brand-specific switch assemblies with unique mounting brackets, voltage ratings, and connector types. Installing a wrong switch can cause electrical damage or complete system failure. Always match your replacement to your exact model number and part specification.
Switch replacement often involves working with high-voltage circuits, which carries real electrical hazard. If you're experienced with AC repair and comfortable working with 240V systems, you can attempt it—but most homeowners should hire a licensed HVAC technician. The cost of professional service is worth the safety and warranty protection you gain.


Ensure your air conditioner's reliable operation with genuine switch replacement parts. Whether you're a homeowner or a professional technician, ordering air conditioner switch parts online is simple and convenient. Use our model number or part number lookup to quickly find the exact replacement you need. Plus, Our same-day shipping ensures you get your parts fast, minimizing any downtime. For more repair guidance, visit our Air Conditioner Repair Help page. Find reliable switch replacements and other Air Conditioner parts to keep your cooling system running smoothly.
When it comes to air conditioner switch parts, knowing your unit's model number is key for finding the right replacement. Typically, the model number can be found on the data plate or sticker inside the unit, often behind the grille or on the side panel. Once located, use this number to perform a precise part lookup and ensure a seamless ordering process online. Whether you're a homeowner or a technician, accessing the correct air conditioner parts is simpler with the right model number. For other air conditioner replacement needs, find Air Conditioner Parts Online.

Finding the correct Air Conditioner switch parts Use your model number to get the right part. Our dedicated support team is available seven days a week to help you with any questions or concerns. Utilize our live chat for quick assistance, or browse our online resources to easily search for the exact model or part number you need. We offer genuine OEM parts to ensure quality and reliability, backed by a price match guarantee and no-hassle 365-day returns. If your Air Conditioner is not cooling properly, a clogged air filter or dirty coils might be the cause. Regular maintenance can prevent these issues. For a fan that's not working, check the fan motor or capacitor. With expert troubleshooting advice and DIY repair guides, you can confidently resolve common issues and keep your A/C running smoothly. Trust Repair Clinic to support your repair journey and confidence. Rely on us for a seamless online ordering experience and prompt support whenever you need it.

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