Tempstar Contactor for T4H424GKD100 — 1-Pole 30A 24V Coil w/Shunt | Ships Today
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Overview
This OEM single-pole definite-purpose contactor (part number 1172472) is the high-voltage switch that energizes the compressor and condenser fan in your Tempstar T4H424GKD100 heat pump. When the thermostat calls for cooling or heating, the low-voltage 24V control circuit energizes the contactor coil, pulling the contacts closed and sending line voltage to the outdoor unit. The integrated shunt provides a controlled path that keeps power flowing to the run circuit even when the contacts open. Rated for 30 amps with a 24-volt coil, this 1-pole contactor is a common wear item — the contacts arc and pit every time they open and close, and the coil can burn out over thousands of cycles. A failing contactor is one of the most frequent causes of an outdoor unit that hums but won't start, or that won't shut off when the thermostat is satisfied.
Specifications
| Spec | Value |
|---|---|
| Part Number | 1172472 |
| Type | Definite-Purpose Contactor |
| Brand | Tempstar (ICP / Heil) |
| Poles | 1-Pole |
| Contact Rating | 30 Amps |
| Coil Voltage | 24V |
| Feature | With Shunt |
| Fitment | OEM Replacement |
Compatibility
This contactor is the factory-specified part for the Tempstar T4H424GKD100 heat pump. Because it is shared across the ICP family (Tempstar, Heil, Comfortmaker, Arcoaire), it also services many comparable single-stage condensing and heat-pump units of the same era. Always confirm the existing contactor's pole count, amp rating, and 24V coil before ordering.
Installation Guide
- Safety First — Disconnect power at the outdoor disconnect and the breaker, then verify zero voltage across the line terminals with a multimeter.
- Access — Remove the service panel on the side of the condensing unit.
- Document — Photograph every wire and terminal before disconnecting anything.
- Remove — Label and pull the line, load, and 24V coil leads; unscrew the old contactor from the bracket.
- Install — Mount the new contactor, transfer the wires to the matching terminals per your photo, confirm the shunt connection is correct.
- Test — Restore power and call for cooling; verify the contacts pull in cleanly and the compressor and fan start.
Signs You Need a Replacement
- Outdoor unit hums or buzzes but the compressor won't start.
- Pitted, burned, or welded contacts visible on the old part.
- Unit won't turn off when the thermostat is satisfied (stuck contacts).
- Chattering or intermittent clicking from the contactor coil.
Shipping & Returns
Ships same day before 3 PM CST. 30-day returns. Backed by the National HVAC Parts fitment guarantee.
Shipping Information
- Orders placed before 3PM CST ship same business day
- Standard delivery: 2-5 business days
- Express shipping available at checkout
- Free shipping on orders over $75
- Tracking number emailed upon shipment
Return Policy
- 30-day returns on unused parts in original packaging
- Electrical parts (capacitors, contactors, control boards) are final sale once installed
- Email info@nationalhvacparts.com to initiate a return
- Refunds processed within 5-7 business days