ICP Single-Pole Contactor for WPG3422090RKB1 — 40A 24V Coil | Ships Today

Overview

This is a genuine OEM single-pole contactor (part number 1173690) for the ICP / Tempstar / Heil WPG3422090RKB1 package unit. The contactor is the high-voltage relay that switches line power to the compressor and condenser fan motor whenever the 24-volt control circuit calls for cooling. This unit is rated at 40 amps with a 24V coil and a single pole, meaning one set of line contacts plus a common leg. When the thermostat energizes the coil, an electromagnet pulls the contacts closed and power flows to the outdoor components; when the call ends, a spring opens the contacts. Because the contacts arc every time they open and close, they slowly pit, corrode, and weld — making the contactor one of the most common failure points in any HVAC system. Typical symptoms of a failing contactor include a unit that won't start, a loud chattering or buzzing hum at the outdoor section, contacts that stick closed so the compressor never shuts off, or visible burning and pitting on the contact points.

Specifications

Compatibility

This contactor is the factory-specified switching relay for the ICP WPG3422090RKB1 package unit and the broader family of Tempstar, Heil, and Comfortmaker units that share International Comfort Products controls. Always confirm the printed part number 1173690 against the contactor in your unit before installing.

Installation Guide

1. Safety First — Disconnect power at the outdoor disconnect and the breaker, then verify zero voltage with a multimeter across the line terminals.
2. Access — Remove the service/control panel on the unit to expose the contactor.
3. Document — Photograph all line and low-voltage wires before disconnecting anything.
4. Remove — Label and disconnect the line leads and the two 24V coil wires, then unscrew the old contactor from the bracket.
5. Install — Mount the new contactor, reconnect each lead to its matching terminal per your photo, and confirm the coil wires land on the coil terminals.
6. Test — Restore power, place a cooling call, and verify the contacts pull in cleanly with no chatter and the compressor and fan energize.

Signs You Need a Replacement

• Outdoor unit hums or buzzes but the compressor won't start.
• Contacts are pitted, blackened, or visibly welded together.
• Compressor runs continuously and won't shut off (stuck-closed contacts).
• Intermittent cooling caused by a chattering coil that won't hold the contacts closed.

Shipping & Returns

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