ICP 2-Pole 30A Contactor for RGS121LFAA0AAAA — 24V Coil | Ships Today

Overview

This OEM 2-pole, 30-amp contactor (part #1178074) is the switching relay that controls power to the high-draw components in your ICP Tempstar Heil RGS121LFAA0AAAA system. When the 24V control circuit energizes the coil, the contactor closes and routes line voltage to the compressor and condenser fan motor. Constant arcing eventually pits, burns, or welds the contact points, and the coil can fail open. Typical symptoms include a system that won't start, buzzing or chattering at the contactor, a humming unit that never engages, or contacts that stick closed and run the system nonstop. Swapping a worn contactor is one of the most common and affordable HVAC repairs.

Specifications

Compatibility

Direct-fit OEM replacement for the ICP Tempstar Heil RGS121LFAA0AAAA and related RGS-series equipment using OEM part 1178074. Always confirm the original contactor's amp rating, pole count, and 24V coil before installing.

Installation Guide

1. Safety First — Disconnect power at the breaker and the unit disconnect, then verify zero voltage with a multimeter.
2. Access — Remove the service/electrical panel to expose the contactor.
3. Document — Photograph every wire and terminal before disconnecting anything.
4. Remove — Label and disconnect the line, load, and 24V coil leads, then unscrew the old contactor from its bracket.
5. Install — Mount the new contactor and reconnect each wire to the matching terminal per your photo.
6. Test — Restore power and verify the contactor pulls in cleanly with no chatter and the system runs.

Signs You Need a Replacement

• Loud buzzing, chattering, or humming at the contactor
• Burned, pitted, or welded contact points
• System won't start or only starts intermittently
• Unit runs continuously because contacts are stuck closed

Shipping & Returns

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