Trane CTR2579 Contactor

The Trane CTR2579 is a rugged, 1-pole, 30-amp magnetic contactor designed as a reliable field swap for problematic switches in residential and light commercial condensers. Operating on a standard 24V coil, this high-performance component manages electrical flow to the compressor and fan motor with 30 FLA (Full Load Amps) capacity. When troubleshooting an air conditioner not cooling, a pitted or welded contactor is often the culprit behind high-voltage circuit failure. As a direct OEM replacement contactor, the CTR2579 drops into existing mounting patterns found in Trane and American Standard units, superseding older part numbers like CTR1143 and CTR02579. For technicians performing emergency AC repair, this single pole contactor offers a clean installation with a 30-amp rating that meets or exceeds legacy 25-amp and 30-amp specifications. Its covered plunger design helps mitigate debris infiltration, ensuring consistent snap-action connectivity even in harsh outdoor environments.

• Direct Compatibility: Seamlessly replaces legacy part numbers CTR1143, CTR01143, and CTR02579 without bracket modification.
• High Load Rating: Engineered for 30-amp HVAC contactor requirements, providing reliable switching for inductive loads like compressors and condenser fan motors.
• Standard 24V Control: Integrates perfectly with common 24-volt thermostat control circuits for quick diagnosing and HVAC repair.
• Durable Construction: Features a robust single-pole design focused on longevity and minimizing arcing across points during high-cycle operation.

Is the Trane CTR2579 compatible with American Standard units?
Yes. As an OEM component, this contactor is the standard replacement for 1-pole, 30V/24V coil applications across both Trane and American Standard residential equipment lines.

Can I use this 30-amp contactor to replace a 25-amp part?
Technicians frequently use the CTR2579 to replace 25-amp 1-pole contactors. Moving to a higher amperage rating is a common trade practice that can improve reliability under heavy load conditions.

What are the symptoms of a failing CTR2579 contactor?
If the ac is not turning on despite receiving 24V at the coil, or if you observe visible pitting/burning on the contact points, it is time for a replacement. A failed coil will show open resistance (Infinite Ohms) when tested with a multimeter.

Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.