ICP 2-Pole 30A Contactor 24V Coil for RGS150LDCA0AAAA — OEM 1178074 | Ships Today

Overview

This genuine OEM 2-pole, 30-amp contactor with a 24-volt coil (part number 1178074) is the switching relay for the ICP/Tempstar/Heil RGS150LDCA0AAAA. When the thermostat calls for cooling, the 24V control signal energizes the coil, pulling the contacts closed to deliver line voltage to the compressor and condenser fan motor. Contactors are a high-failure wear item: their contacts pit, arc, and weld over thousands of cycles. A failed contactor is one of the most common causes of a no-cool call — either the unit won't start, or it won't shut off because the contacts have welded closed.

Specifications

Compatibility

Direct OEM replacement for the ICP RGS150LDCA0AAAA and other units calling out part 1178074. Verify pole count, amp rating, and 24V coil against your old contactor before installing.

Installation Guide

1. Safety First — Disconnect power at the disconnect and verify zero voltage with a multimeter on both line terminals.
2. Access — Remove the electrical service 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 2-pole contactor, transfer each wire to the matching terminal per your photo, and confirm the coil leads land on the 24V terminals.
6. Test — Restore power, call for cooling, and verify the contacts pull in cleanly and the compressor/fan energize.

Signs You Need a Replacement

• Unit won't start on a cooling call (no click, no pull-in)
• Compressor or fan runs continuously and won't shut off (welded contacts)
• Pitted, blackened, or burned contacts on inspection
• Loud buzzing or chattering from the contactor

Shipping & Returns

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