What are the specs for this Transformer?

The correct replacement for ICP model RGS240HSAA0AAAA — 120/24V | 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 RGS240HSAA0AAAA — 120/24V | Ships Today.

ICP

ICP 40VA Control Transformer for RGS240HSAA0AAAA — 120/24V | Ships Today

Name: ICP 40VA Control Transformer for RGS240HSAA0AAAA — 120/24V | Ships Today
Brand: ICP
SKU: 1183814-GEN
Price: 34.00 USD
Availability: InStock

SKU: 1183814-GEN Brand: ICP

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Overview

This OEM control transformer assembly supplies the low-voltage 24V power that runs the entire control circuit on your ICP / Tempstar / Heil RGS240HSAA0AAAA gas furnace. It steps line voltage (120V) down to 24V and feeds the relays, gas valve, igniter circuit, and thermostat. Included OEM relays — part 1183814 (24V DPDT, T92S11A22-24) and 1178205 (24V DPST, T92P7A22-24) — switch the blower and inducer loads on command from the control board. When the transformer or its companion relays fail, the furnace goes completely dead: no blower, no ignition sequence, and a thermostat that simply will not call. A buzzing transformer, blown low-voltage fuse, or burnt relay contacts are the classic failure symptoms. Replacing with the correct OEM 40VA part restores reliable, code-compliant operation.

Specifications

Spec	Value
Part Numbers	1183814 (Relay 24V DPDT), 1178205 (Relay 24V DPST)
Type	Control Transformer / Relay Set
Brand	ICP (Tempstar / Heil)
Primary Voltage	120V
Secondary Voltage	24V
Rating	40VA
Relay Config	DPDT (T92S11A22-24) & DPST (T92P7A22-24)

Compatibility

Engineered for the ICP RGS240HSAA0AAAA gas furnace and shared across many Tempstar, Heil, Comfortmaker, and Arcoaire RGS-series models that use the same 24V control architecture. Always confirm the OEM part number on your existing component before ordering.

Installation Guide

Safety First — Disconnect power at the furnace switch and breaker, verify zero voltage with a multimeter.
Access — Remove the furnace control/burner service panel.
Document — Photograph all primary and secondary wire connections before disconnecting.
Remove — Unplug the low-voltage leads, release the transformer/relay mounting screws, and lift the old component out.
Install — Mount the new transformer and relays, reconnect each lead exactly per your photo.
Test — Restore power, confirm 24V at the secondary and a normal heat call sequence.

Signs You Need a Replacement

Furnace is completely unresponsive — no blower, no ignition.
Repeatedly blown 3-amp low-voltage control fuse.
Audible buzzing or burning smell from the control area.
Relay contacts pitted, stuck, or chattering.

Shipping & Returns

Ships same day before 3 PM CST. 30-day returns. 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 40VA Control Transformer for...

$34.00

Frequently Asked Questions

Does this Transformer fit my ICP RGS240HSAA0AAAA — 120/24V | Ships Today?

Yes. This is the factory-specified OEM transformer for the ICP RGS240HSAA0AAAA — 120/24V | 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 RGS240HSAA0AAAA — 120/24V | 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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