ICP 2-Pole 30A Contactor for RGS121LDCA0AAA — OEM 24V Coil Definite Purpose | Ships Today

Overview

This OEM 2-pole, 30-amp definite-purpose contactor (part #1178074) with a 24V coil is the main switching relay for the ICP / Heil / Tempstar RGS121LDCA0AAA. When the thermostat calls, the 24-volt coil pulls in the contacts to send line voltage to the compressor and condenser fan motor. Contactors are a high-wear item — every cycle arcs the contacts, and over years they pit, burn, weld shut, or fail to pull in. Symptoms include a system that won't start, a buzzing or chattering contactor, contacts welded so the compressor won't shut off, or visible pitting and burn marks on the contact pads. Replacing it restores clean, reliable switching and protects the compressor from low-voltage and chatter damage.

Specifications

Compatibility

Fits the ICP/Heil/Tempstar RGS121LDCA0AAA and any system specifying a 2-pole, 30A, 24V definite-purpose contactor. Match poles, amp rating, and coil voltage to your existing contactor before installing.

Installation Guide

1. Safety First — Disconnect power at the disconnect and breaker; verify zero voltage with a multimeter.
2. Access — Remove the control-panel service cover.
3. Document — Photograph all line, load, and 24V coil wire positions before disconnecting.
4. Remove — Label and remove the wires, then unbolt the old contactor from its mount.
5. Install — Mount the new contactor and reconnect each wire to the matching terminal per your photo.
6. Test — Restore power and confirm the contactor pulls in cleanly on a call and the compressor/fan start normally.

Signs You Need a Replacement

• System won't start or starts intermittently
• Loud buzzing, humming, or chattering at the contactor
• Contacts welded closed so the unit won't shut off
• Pitted, burned, or corroded contact pads

Shipping & Returns

Ships same day before 3 PM CST. 30-day returns. Backed by the National HVAC Parts fitment guarantee.