What amp contactor do I need for my ICP system?

The correct replacement for ICP model RGS121HTBA0AAAA — 30A/40A 24V Coil | Ships Today is this exact part. It is the factory-specified replacement with exact OEM specifications. Using a part with different specifications can cause equipment damage or void your warranty. You can verify this by checking the data plate on your ICP equipment which lists the model number RGS121HTBA0AAAA — 30A/40A 24V Coil | Ships Today.

My AC clicks but the compressor does not turn on. What is wrong?

Clicking from the outdoor unit without the compressor starting usually means a worn contactor. The contactor is the relay that sends power to the compressor. When its contacts are pitted or worn, it clicks but cannot establish a solid electrical connection. Other symptoms: visible pitting or burn marks on the contactor face, AC works intermittently, or buzzing from the contactor.

ICP

ICP 2-Pole Contactor for RGS121HTBA0AAAA — 30A/40A 24V Coil | Ships Today

Name: ICP 2-Pole Contactor for RGS121HTBA0AAAA — 30A/40A 24V Coil | Ships Today
Brand: ICP
SKU: 1178074-GEN
Price: 26.95 USD
Availability: InStock

SKU: 1178074-GEN Brand: ICP

OEM Guaranteed

Same-Day Ship

30-Day Returns

Secure Checkout

Texas CMBL #19328542014

SAM.gov Registered

Govt POs Accepted

Overview

This is a genuine OEM 2-pole definite-purpose contactor for the ICP Tempstar Heil RGS121HTBA0AAAA condensing unit. The contactor is the electrically operated switch that energizes the compressor and condenser fan motor on every cooling call. When the 24V control coil is energized by the thermostat, the contactor pulls in and closes its line-voltage contacts to power the outdoor unit. This listing covers the OEM-specified 2-pole contactor in 30A (part 1178074) and 40A (part 1178211) ratings with a 24-volt coil. Common failure symptoms include pitted or welded contacts, a buzzing or chattering coil, an outdoor unit that hums but won't start, or a compressor that won't shut off because the contacts have fused closed.

Specifications

Spec	Value
OEM Part Numbers	1178074 (30A), 1178211 (40A)
Type	Definite Purpose Contactor
Brand	ICP / Tempstar / Heil
Poles	2-Pole
Contact Rating	30A / 40A
Coil Voltage	24V

Compatibility

Engineered for the ICP Tempstar Heil RGS121HTBA0AAAA and other ICP-family condensing units using a 2-pole 24V-coil contactor. Confirm your existing contactor's amp rating (30A or 40A) and coil voltage before ordering for an exact fit.

Installation Guide

Safety First — Disconnect power at the disconnect and breaker, then verify zero voltage with a multimeter.
Access — Remove the service panel on the condensing unit.
Document — Photograph all wires before disconnecting.
Remove — Note line, load, and 24V coil wire positions, remove the old contactor from its bracket, and transfer wiring one terminal at a time.
Install — Mount the new contactor, reconnect each wire per your photo, and confirm the coil leads land on the 24V terminals.
Test — Restore power and call for cooling; verify the contactor pulls in cleanly and the unit runs.

Signs You Need a Replacement

Outdoor unit hums but won't start
Burnt, pitted, or welded contacts
Loud chattering or buzzing from the contactor
Compressor that won't shut off after the call ends

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

ICP 2-Pole Contactor for RGS121H...

$26.95

Frequently Asked Questions

Does this Contactor fit my ICP RGS121HTBA0AAAA — 30A/40A 24V Coil | Ships Today?

Yes. This is the factory-specified OEM contactor for the ICP RGS121HTBA0AAAA — 30A/40A 24V Coil | Ships Today. It is a direct drop-in replacement that fits without modification. Always verify the model number on your equipment nameplate before ordering.

How do I replace the contactor on my ICP RGS121HTBA0AAAA — 30A/40A 24V Coil | Ships Today?

Difficulty: Medium (30–45 min)
Step 1: Turn off breaker. Step 2: Open condensing unit panel. Step 3: Photograph ALL wiring on the contactor. Step 4: Label each wire with tape. Step 5: Disconnect wires and remove old contactor. Step 6: Mount new contactor, reconnect wires matching your photo. Step 7: Restore power and test.

My AC clicks but the compressor won’t turn on. What’s wrong?

Clicking from the outdoor unit without the compressor starting = worn contactor. The contactor sends power to the compressor. When its contacts are pitted, it clicks but can’t make solid contact. Look for: visible pitting/burn marks on the contactor face, intermittent operation, or buzzing.

Is this contactor compatible with Bryant or Payne too?

Many ICP parts are cross-compatible with Bryant and Payne since all three brands are manufactured by Carrier Global Corporation. The same physical part is often used across brand labels with different model numbers. To verify: check your Bryant or Payne equipment service manual for cross-compatible part numbers, or email info@nationalhvacparts.com with your model number.

Should I use OEM or aftermarket for my ICP contactor?

OEM recommended for reliability and warranty compatibility. OEM parts match exact factory specifications for proper fit, performance, and safety. While aftermarket alternatives cost less upfront, the risk of improper fit and reduced lifespan usually makes OEM the better value long-term.

How fast does National HVAC Parts ship?

Orders placed before 3:00 PM CST ship the same business day. Standard delivery is 2–5 business days anywhere in the continental United States. Express shipping available at checkout. We ship from Houston, TX to all 50 states. 30-day return policy on all parts.

Menu