Heavy-Duty, UL-Certified HVAC Replacement Parts.
Industrial-grade capacitors, contactors, and transformers designed for peak performance. Built for the professional, accessible to the dedicated homeowner.
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The Coralvolt Standard
Engineered for the demands of modern infrastructure.
Military Grade Specs
Premium Capacitors and Contactors engineered for extreme US weather. Tested in real-world scenarios to ensure zero-fail performance.
UL Certified Safety
Every component meets rigorous UL standards for safety and reliability in high-voltage HVAC applications.
Field-Tested Durability
Trusted by technicians as the go-to for emergency replacements. Built to withstand 24/7 commercial duty cycles.
Rapid US Shipping
Fast Local US Shipping — No Jobsite Delays. We maintain massive inventory levels to ensure you stay on schedule.
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CORALVOLT 24V 40VA HVAC Transformer, Multi-Tap 120/208/240V Input – Pack of 3
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CORALVOLT 30 Amp 3-Pole Definite Purpose Contactor 24V Coil – Pack of 3
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CORALVOLT 40 Amp 1/1.5-Pole Definite Purpose Contactor 24V Coil – Pack of 3
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CORALVOLT 40 Amp 3-Pole Definite Purpose Contactor 24V Coil – Pack of 3
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CORALVOLT 30 Amp 2-Pole Definite Purpose Contactor 24V Coil – Pack of 3
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CORALVOLT 30 Amp 1/1.5-Pole Definite Purpose Contactor 24V Coil – Pack of 3
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CORALVOLT 5+5 µF Dual Run Oval HVAC Capacitor – 370/440V AC | CBB65, UL Rated – Multi-Pack
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CORALVOLT 10+5 µF Dual Run Oval HVAC Capacitor – 370/440V AC | CBB65, UL Rated – Multi-Pack
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From the workbench
HVAC repair guides
How to Safely Discharge an AC Capacitor Before Replacing It
The Power Is Off. The Capacitor Isn't. A run capacitor's whole job is to store a charge, and it keeps doing that...
Read the guide Sep 08, 2026What the 24V Transformer Does in Your Furnace or AC (And How to Tell It's Failed)
The Part That Powers Everything That Thinks Your air conditioner and furnace run on 120 V or 240 V. Your thermostat, the...
Read the guide Sep 08, 2026Why Your AC Contactor Is Buzzing or Chattering (And What to Do About It)
That Buzz Is Telling You Something A healthy contactor makes one sound: a single click when the thermostat calls, and another when...
Read the guide