ICP 2-Pole Definite Purpose Contactor for RGS121HRAB0AAAA — 30A/40A 24V Coil | Ships Today

Overview

This OEM 2-pole definite purpose contactor is the electrically-controlled switch that energizes the compressor and condenser fan circuits in your ICP RGS121HRAB0AAAA system. When the thermostat calls for cooling, the 24V control coil pulls the contacts closed, sending line voltage to the high-amperage components. ICP supplies this assembly in both 30A (P/N 1178074) and 40A (P/N 1178211) ratings. A failing contactor is one of the most common HVAC service calls — symptoms include a system that won't start, an audible buzzing or chattering from the contactor, pitted or welded contacts, or a unit that runs continuously because the contacts have fused closed.

Specifications

Compatibility

Engineered for the ICP/Heil/Tempstar RGS121HRAB0AAAA gas furnace and condensing unit family. Confirm the amperage rating stamped on your existing contactor before ordering. Definite purpose contactors of matching pole count, coil voltage, and equal-or-greater amp rating are interchangeable.

Installation Guide

1. Safety First — Disconnect power at the breaker and service disconnect, then verify zero voltage with a multimeter.
2. Access — Remove the unit service panel.
3. Document — Photograph all line, load, and coil wiring before disconnecting.
4. Remove — Note terminal positions, disconnect leads, and unscrew the old contactor from its mounting plate.
5. Install — Mount the new contactor and reconnect each wire exactly per your photo.
6. Test — Restore power, call for cooling, and confirm the contacts pull in cleanly with no chatter.

Signs You Need a Replacement

• System fails to start when the thermostat calls for cooling
• Loud buzzing, humming, or chattering at the contactor
• Visibly pitted, burned, or welded contacts
• Compressor or fan runs continuously and won't shut off

Shipping & Returns

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