ICP 1-Pole 40A Contactor for WPG4484090LKA1 — 24V Coil | Ships Today

Overview

This is a genuine OEM single-pole (1-pole) 40 amp contactor with a 24V coil (part number 1173690) for the ICP Tempstar Heil WPG4484090LKA1. The contactor is the high-voltage relay that switches line power to the compressor and condenser fan motor. When the thermostat calls for cooling, 24V energizes the coil, pulling the contacts closed to send line voltage to the outdoor unit. Over time the contacts pit, burn, and weld from arcing, while the coil can fail open. Symptoms of a bad contactor include a humming or chattering outdoor unit, a compressor that won't start, or contacts that stick closed so the unit runs continuously.

Specifications

Compatibility

Direct-fit OEM replacement for the ICP Tempstar Heil WPG4484090LKA1 and equivalent ICP-built Tempstar, Heil, Comfortmaker, and Arcoaire units that use the 1-pole 40A 24V contactor 1173690. Confirm pole count, 40A rating, and 24V coil on the existing contactor before ordering.

Installation Guide

1. Safety First — Disconnect power at the disconnect and breaker and verify zero voltage with a multimeter across the contactor terminals.
2. Access — Remove the service panel to expose the contactor in the control area.
3. Document — Photograph every line, load, and 24V coil wire before disconnecting.
4. Remove — Transfer wires one at a time or label them, then unbolt the old contactor from the bracket.
5. Install — Mount the new contactor and reconnect line, load, and coil wiring exactly per your photos.
6. Test — Restore power, call for cooling, and confirm the coil pulls the contacts in and the compressor/fan start.

Signs You Need a Replacement

• Outdoor unit hums or buzzes but won't start.
• Burned, pitted, or welded contacts.
• Contacts stick closed and the unit runs nonstop.
• 24V coil reads open or fails to pull the contacts in.

Shipping & Returns

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