What are the specs for this Transformer?

The correct replacement for ICP model WPG4604090RKA1 — 208/230V 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 WPG4604090RKA1 — 208/230V to 24V | Ships Today.

ICP

ICP 40VA Transformer for WPG4604090RKA1 — 208/230V to 24V | Ships Today

Name: ICP 40VA Transformer for WPG4604090RKA1 — 208/230V to 24V | Ships Today
Brand: ICP
SKU: WPG4604090RKA1-GEN
Price: 29.00 USD
Availability: InStock

SKU: WPG4604090RKA1-GEN Brand: ICP

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Overview

This OEM 40VA control transformer (part 1173691, with 24V barrier 1178431) supplies the low-voltage control circuit on the ICP/Tempstar/Heil WPG4604090RKA1 packaged unit. It steps line voltage (208/230V) down to 24V to power the control board, thermostat, gas valve, contactor coil, and safety switches. A failed transformer means a completely dead control system — no thermostat response, no ignition sequence, and no cooling or heating. Transformers usually fail from a shorted 24V circuit, a seized contactor coil, or age-related winding breakdown, so inspect the load circuit before reinstalling power.

Specifications

Spec	Value
Part Numbers	1173691, 1178431
Type	Control Transformer
Rating	40 VA
Primary Voltage	208/230V
Secondary Voltage	24V
Brand	ICP / Tempstar / Heil
Fits Model	WPG4604090RKA1

Compatibility

Built for the ICP WPG4604090RKA1 packaged gas/electric unit and matching Tempstar, Heil, and Comfortmaker WPG-series equipment using a 208/230V-to-24V 40VA control transformer. Confirm primary/secondary voltage and VA rating before installing.

Installation Guide

Safety First — Disconnect power at the unit disconnect and verify zero voltage with a multimeter.
Access — Remove the control compartment service panel.
Document — Photo every primary and secondary lead and its terminal before disconnecting.
Remove — Label and disconnect the leads, then unbolt the old transformer from its mount.
Install — Mount the new transformer, wire the matching primary taps (208 vs 230V) and 24V secondary per your photo.
Test — Restore power and confirm 24V across the secondary and normal control operation.

Signs You Need a Replacement

Completely unresponsive thermostat and controls
No 24V reading on the secondary terminals
Burnt smell or visibly charred transformer housing
Repeatedly blown low-voltage fuse on the control board

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...

$29.00

Frequently Asked Questions

Does this Transformer fit my ICP WPG4604090RKA1 — 208/230V to 24V | Ships Today?

Yes. This is the factory-specified OEM transformer for the ICP WPG4604090RKA1 — 208/230V 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 WPG4604090RKA1 — 208/230V 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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