ICP 2-Pole 30A 24V Contactor for RGS121STBB0AAAA — OEM Definite Purpose Contactor | Ships Today

Overview

This is a genuine OEM 2-pole, 30-amp definite purpose contactor with a 24V coil, ICP part number 1178074. The contactor is the electrical switch that powers the compressor and condenser fan motor on and off. When the thermostat calls for cooling, 24 volts energizes the contactor coil, pulling the contacts closed and sending line voltage to the outdoor unit; when the call ends, the coil releases and the contacts open. As a high-cycle component, the contacts erode over time and the coil can fail. A bad contactor is one of the most common causes of an outdoor unit that won't start, hums without running, or won't shut off. Replacing it restores reliable switching and protects the compressor from chatter and low-voltage damage.

Specifications

Compatibility

Direct-fit OEM replacement for the ICP / Tempstar / Heil model RGS121STBB0AAAA and platform units using a 2-pole 30A 24V-coil contactor. Confirm pole count, amp rating, and 24V coil match your existing contactor before installing.

Installation Guide

1. Safety First — Disconnect power at the unit disconnect and breaker, then verify zero voltage with a multimeter.
2. Access — Remove the electrical access panel on the unit.
3. Document — Photograph every wire and terminal position before disconnecting.
4. Remove — Transfer wires one at a time or label them, then unscrew the old contactor from the bracket.
5. Install — Mount the new contactor and reconnect line, load, and 24V coil leads per your photo.
6. Test — Restore power, call for cooling, and confirm the contacts pull in and the unit starts cleanly.

Signs You Need a Replacement

• Outdoor unit hums but the compressor/fan won't start
• Contacts are pitted, burned, or welded together
• Unit won't shut off when the call ends
• Chattering or buzzing at the contactor

Shipping & Returns

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