What are the specs for this Transformer?

The correct replacement for ICP model WPG4604115RKB1 — 208/230 to 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 WPG4604115RKB1 — 208/230 to 24V | Ships Today.

ICP

ICP 40VA Transformer for WPG4604115RKB1 — 208/230 to 24V | Ships Today

Name: ICP 40VA Transformer for WPG4604115RKB1 — 208/230 to 24V | Ships Today
Brand: ICP
SKU: 1178431-GEN
Price: 29.95 USD
Availability: InStock

SKU: 1178431-GEN Brand: ICP

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Overview

This OEM 40VA control transformer (ICP parts #1173691 transformer and #1178431 24V barrier) steps line voltage down to the 24-volt control power that runs the thermostat, contactor coil, gas valve, and control board on your ICP / Tempstar / Heil WPG4604115RKB1 package unit. Rated at 40VA with a 208/230V primary and 24V secondary, it supplies the low-voltage circuit the entire system depends on. When the transformer fails — often from a shorted thermostat wire or a stuck contactor drawing too much current — the unit goes completely dead with no response at the thermostat. This direct-fit replacement restores 24V control power.

Specifications

Spec	Value
Part Numbers	1173691 (Transformer), 1178431 (24V Barrier)
Type	Step-Down Control Transformer
Brand	ICP (Tempstar / Heil / Comfortmaker)
Rating	40 VA
Primary Voltage	208/230 VAC
Secondary Voltage	24 VAC

Compatibility

Direct OEM fit for the ICP/Tempstar/Heil WPG4604115RKB1 package gas/electric unit and interchangeable across ICP-family furnaces, condensers, and package units using a 40VA, 208/230-to-24V control transformer. Confirm VA rating and primary/secondary voltages against the original before installing.

Installation Guide

Safety First — Disconnect power at the breaker and disconnect, then verify zero voltage with a multimeter.
Access — Remove the control compartment service panel.
Document — Photograph the primary and secondary wiring before disconnecting; correct any shorted low-voltage wiring that caused the failure.
Remove — Disconnect the leads and unbolt the old transformer from its bracket.
Install — Mount the new transformer, reconnect primary and secondary leads per your photo, and verify the 24V barrier is in place.
Test — Restore power and confirm 24 VAC at the secondary and normal thermostat operation.

Signs You Need a Replacement

System completely dead — no thermostat display or response
No 24V control power measured at the secondary
Burnt smell or visibly charred transformer windings
Repeated control-fuse blowing or tripping

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 40VA Transformer for WPG4604...

$29.95

Frequently Asked Questions

Does this Transformer fit my ICP WPG4604115RKB1 — 208/230 to 24V | Ships Today?

Yes. This is the factory-specified OEM transformer for the ICP WPG4604115RKB1 — 208/230 to 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 WPG4604115RKB1 — 208/230 to 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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