What are the specs for this Transformer?

The correct replacement for ICP model RHS048S0BA0AAAA — 40VA Class II | 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 RHS048S0BA0AAAA — 40VA Class II | Ships Today.

ICP

ICP 24V Control Transformer for RHS048S0BA0AAAA — 40VA Class II | Ships Today

Name: ICP 24V Control Transformer for RHS048S0BA0AAAA — 40VA Class II | Ships Today
Brand: ICP
SKU: 1178205
Price: 39.00 USD
Availability: InStock

SKU: 1178205 Brand: ICP

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Overview

This OEM 24V control transformer package supplies low-voltage power to the control circuit on the ICP Tempstar Heil RHS048S0BA0AAAA heat pump. Rated 40VA with a 24V Class II secondary, it energizes the DPST control relay (P/N 1178205, T92P7A22-24) and the reversing valve with coil (P/N 1175367) that switches the system between heating and cooling. When the transformer degrades or opens, the 24V circuit drops out — the thermostat goes unresponsive, the relay won't pull in, and the reversing valve can't shift, leaving the heat pump stuck in one mode or completely dead.

Specifications

Spec	Value
Part Numbers	1178205, 1175367
Type	Control Transformer / 24V Circuit
Brand	ICP (Tempstar / Heil)
Rating	40VA
Secondary Voltage	24V Class II
Relay	DPST, 24V (T92P7A22-24)

Compatibility

Engineered for the ICP / Tempstar / Heil RHS048S0BA0AAAA heat pump and other RHS048-series units sharing the same low-voltage control package. Confirm your model and part number before ordering.

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 wiring before disconnecting.
Remove — Label and disconnect the primary and 24V secondary leads, then unbolt the failed transformer/relay.
Install — Mount the new component and reconnect each lead per your photo.
Test — Restore power and confirm 24V at the secondary and proper reversing-valve operation.

Signs You Need a Replacement

No 24V at the control terminals (dead thermostat)
Relay will not pull in or chatters
Reversing valve fails to shift between heat and cool
Visible scorching or a blown low-voltage fuse

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 for ...

$39.00

Frequently Asked Questions

Does this Transformer fit my ICP RHS048S0BA0AAAA — 40VA Class II | Ships Today?

Yes. This is the factory-specified OEM transformer for the ICP RHS048S0BA0AAAA — 40VA Class II | 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 RHS048S0BA0AAAA — 40VA Class II | 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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