What are the specs for this Transformer?

The correct replacement for ICP model RHS181H0BA0AAAA — 40VA 24-Volt | 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 RHS181H0BA0AAAA — 40VA 24-Volt | Ships Today.

ICP

ICP 24V Control Transformer & Relay Kit for RHS181H0BA0AAAA — 40VA 24-Volt | Ships Today

Name: ICP 24V Control Transformer & Relay Kit for RHS181H0BA0AAAA — 40VA 24-Volt | Ships Today
Brand: ICP
SKU: 1172619
Price: 51.94 USD
Availability: InStock

SKU: 1172619 Brand: ICP

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Overview

This OEM 24-volt control transformer and relay kit supplies low-voltage power to the control circuit of your ICP Tempstar/Heil RHS181H0BA0AAAA heat pump. The 40VA transformer steps incoming line voltage down to the 24V needed by the thermostat, reversing-valve coil, contactor coils, and control board. Included are the reversing valve coil (1172619), a 24V DPDT relay (1183814, T92S11A22-24), and a 24V DPST relay (1178205, T92P7A22-24). When the transformer fails or a relay sticks, the system loses 24V control power — symptoms include a completely dead system, blown low-voltage fuse, chattering contactor, or a heat pump that will not switch between heating and cooling.

Specifications

Spec	Value
OEM Part Numbers	1172619, 1183814, 1178205
Type	24V Control Transformer & Relay Kit
Brand	ICP (Tempstar / Heil)
Rating	40 VA
Voltage	24V
Relays	DPDT (T92S11A22-24), DPST (T92P7A22-24)

Compatibility

Engineered as a direct OEM fit for the ICP Tempstar/Heil RHS181H0BA0AAAA heat pump and related RHS181 series condensing units that use 24V control circuits.

Installation Guide

Safety First — Disconnect power at the breaker and verify zero voltage with a multimeter.
Access — Remove the control-panel service cover.
Document — Photograph all low-voltage wiring before disconnecting.
Remove — Disconnect the transformer/relay leads and unscrew the failed component from its bracket.
Install — Mount the new transformer/relays and reconnect each lead exactly per your photo.
Test — Restore power and confirm a steady 24V at the secondary and proper relay pull-in.

Signs You Need a Replacement

System completely dead with no 24V at the thermostat
Repeatedly blown low-voltage fuse
Chattering or non-engaging contactor relay
Heat pump won't switch between heating and cooling

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 24V Control Transformer & Re...

$51.94

Frequently Asked Questions

Does this Transformer fit my ICP RHS181H0BA0AAAA — 40VA 24-Volt | Ships Today?

Yes. This is the factory-specified OEM transformer for the ICP RHS181H0BA0AAAA — 40VA 24-Volt | 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 RHS181H0BA0AAAA — 40VA 24-Volt | 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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