What are the specs for this Transformer?

The correct replacement for ICP model RGS240HRAA0AAAA — 40VA 24V Control | 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 RGS240HRAA0AAAA — 40VA 24V Control | Ships Today.

ICP

ICP Transformer for RGS240HRAA0AAAA — 40VA 24V Control | Ships Today

Name: ICP Transformer for RGS240HRAA0AAAA — 40VA 24V Control | Ships Today
Brand: ICP
SKU: 1183814
Price: 32.44 USD
Availability: InStock

SKU: 1183814 Brand: ICP

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Overview

This OEM 24-volt control assembly supplies low-voltage power to the control circuit of your ICP / Tempstar / Heil RGS240HRAA0AAAA rooftop gas-electric unit. The 40VA transformer steps the 208/240V line voltage down to the 24V secondary that powers the thermostat, ignition control, and switching relays. Included in this control group are the 24V switching relays (OEM 1183814 DPDT and 1178205 DPST) that energize the blower and auxiliary loads on a call for heat or cool. When a transformer or relay fails, the entire low-voltage circuit goes dead — the unit will not respond to the thermostat, the contactor will not pull in, and you will read 0 volts across the R and C terminals.

Specifications

Spec	Value
OEM Part Numbers	1183814 (Relay 24V DPDT T92S11A22-24), 1178205 (Relay 24V DPST T92P7A22-24)
Type	Control Transformer / 24V Switching Relays
Brand	ICP (Tempstar / Heil / Comfortmaker)
Rating	40 VA
Primary Voltage	208/240V
Secondary Voltage	24V

Compatibility

Engineered for the ICP / Tempstar / Heil RGS240HRAA0AAAA rooftop gas-electric package unit and other RGS240-series cabinets that use the same 24V control architecture. Always confirm your existing part number before ordering.

Installation Guide

Safety First — Disconnect power at the unit disconnect and verify zero voltage with a multimeter.
Access — Remove the control-access service panel.
Document — Photograph every low-voltage wire and terminal before disconnecting.
Remove — Label and pull the leads from the failed transformer/relay, then unscrew it from the mounting bracket.
Install — Mount the new component and reconnect each lead exactly per your photo.
Test — Restore power and confirm 24V across R–C and proper relay pull-in on a thermostat call.

Signs You Need a Replacement

No 24V at the thermostat or control board (0V across R and C)
Unit completely unresponsive to thermostat calls
Contactor or blower relay will not energize
Buzzing, scorched, or visibly burned transformer/relay housing

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 Transformer for RGS240HRAA0A...

$32.44

Frequently Asked Questions

Does this Transformer fit my ICP RGS240HRAA0AAAA — 40VA 24V Control | Ships Today?

Yes. This is the factory-specified OEM transformer for the ICP RGS240HRAA0AAAA — 40VA 24V Control | 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 RGS240HRAA0AAAA — 40VA 24V Control | 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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