What are the specs for this Transformer?

The correct replacement for ICP model RGS243HEEA0AAAA — 40VA 24V Output | 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 RGS243HEEA0AAAA — 40VA 24V Output | Ships Today.

ICP

ICP Control Transformer for RGS243HEEA0AAAA — 40VA 24V Output | Ships Today

Name: ICP Control Transformer for RGS243HEEA0AAAA — 40VA 24V Output | Ships Today
Brand: ICP
SKU: 1183814
Price: 32.44 USD
Availability: InStock

SKU: 1183814 Brand: ICP

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Overview

This OEM control transformer and 24V relay assembly powers the low-voltage control circuit on your ICP (Heil / Tempstar / Comfortmaker) RGS243HEEA0AAAA packaged gas/electric unit. It steps the 120V line supply down to the 24V required by the thermostat, contactor coil, gas valve, and control board. The kit covers OEM relays 1183814 (24V DPDT) and 1178205 (24V DPST) used in the control sequence. When the transformer or its relays fail, the entire system loses 24V control power — the unit goes completely dead, the thermostat blanks out, or the blower and condenser fail to energize on a call.

Specifications

Spec	Value
OEM Part Numbers	1183814, 1178205
Type	Control transformer / 24V relay
Brand	ICP (Heil / Tempstar / Comfortmaker)
Rating	40 VA
Primary Voltage	120V
Secondary Voltage	24V
Relays	DPDT (T92S11A22-24), DPST (T92P7A22-24)

Compatibility

Engineered for the ICP RGS243HEEA0AAAA and matching RGS243-series packaged units across the Heil, Tempstar, Comfortmaker, and Arcoaire family. Always confirm your existing transformer VA rating and relay pole configuration before ordering.

Installation Guide

Safety First — Disconnect power at the unit and breaker, then verify zero voltage with a multimeter.
Access — Remove the control-section service panel.
Document — Photograph all primary and secondary wiring before disconnecting.
Remove — Label and disconnect the transformer leads and relay terminals, then unbolt the old components from the mounting plate.
Install — Mount the new transformer and relays, reconnect each lead exactly per your photo.
Test — Restore power and verify a steady 24V across the secondary on a thermostat call.

Signs You Need a Replacement

System completely dead with no 24V at the control board
Blank thermostat or repeatedly tripped low-voltage fuse
Burnt smell or visibly scorched transformer windings
Contactor or relays chattering or failing to pull in

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 Control Transformer for RGS2...

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Frequently Asked Questions

Does this Transformer fit my ICP RGS243HEEA0AAAA — 40VA 24V Output | Ships Today?

Yes. This is the factory-specified OEM transformer for the ICP RGS243HEEA0AAAA — 40VA 24V Output | 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 transformer on my ICP RGS243HEEA0AAAA — 40VA 24V Output | Ships Today?

Difficulty: Medium (30–45 min)
Step 1: Turn off breaker. Step 2: Photo wiring connections. Step 3: Disconnect wires from old transformer. Step 4: Remove mounting hardware. Step 5: Install new transformer, reconnect wires matching voltage ratings. Step 6: Verify 24V output with multimeter.

My thermostat has no power. What failed?

Thermostat with no display = failed 24V transformer (or blown control board fuse). Check the 3A/5A fuse on the control board first ($1–$5 fix). If fuse is good but no 24V output from transformer, replace transformer.

Is this transformer 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 transformer?

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.

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