ICP 2-Pole 30A 24V Contactor for RGS121STAA0AAAA — 30 Amp | Ships Today

Overview

This is the genuine OEM ICP 2-pole, 30-amp contactor with a 24-volt coil, part number 1178074, for the RGS121STAA0AAAA system. The contactor is an electrically controlled switch: when the 24V coil energizes on a call from the control board, it pulls in two sets of line-voltage contacts to power the connected load. A contactor lives a hard life of constant make/break cycles, so its contacts eventually pit, burn, or weld. Symptoms of failure include a unit that won't start, a humming or chattering contactor, contacts that stay stuck closed so the load runs continuously, or visibly burnt and corroded terminals. Replacing a worn contactor restores reliable switching and protects downstream components.

Specifications

Compatibility

Fits the ICP/Tempstar/Heil RGS121STAA0AAAA and other ICP-family units specifying a 2-pole 30A contactor with a 24V coil. Match poles, amp rating, and coil voltage to your original before ordering.

Installation Guide

1. Safety First — Disconnect power at the disconnect and breaker; verify zero voltage with a multimeter.
2. Access — Remove the electrical/service panel to reach the contactor.
3. Document — Photograph all line, load, and coil wiring before disconnecting.
4. Remove — Transfer wires one at a time or label each, then unscrew the old contactor from its base.
5. Install — Mount the new 1178074 contactor and reconnect every wire per your photo, torquing terminals snug.
6. Test — Restore power and confirm the contactor pulls in cleanly and the load starts and stops on demand.

Signs You Need a Replacement

• Unit won't start or starts intermittently.
• Loud humming or chattering from the contactor.
• Contacts stuck closed so the load runs nonstop.
• Burnt, pitted, or corroded contacts and terminals.

Shipping & Returns

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