What are the specs for this Transformer?

The correct replacement for ICP model WPG4244040LKB1 — 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 WPG4244040LKB1 — 208/230 to 24V | Ships Today.

ICP

ICP 40VA Transformer for WPG4244040LKB1 — 208/230 to 24V | Ships Today

Name: ICP 40VA Transformer for WPG4244040LKB1 — 208/230 to 24V | Ships Today
Brand: ICP
SKU: 1178431
Price: 44.20 USD
Availability: InStock

SKU: 1178431 Brand: ICP

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Overview

This genuine OEM ICP control transformer (part number 1173691) steps 208/230V line voltage down to 24V to power the low-voltage control circuit on your WPG4244040LKB1 packaged unit. It supplies the thermostat, control board, gas valve, contactor coil, and relays — everything the system needs to call for heating or cooling. The included 24V barrier (part number 1178431) keeps the low-voltage wiring properly isolated and organized at the terminals. When the transformer fails or its internal thermal fuse opens, the entire 24V control circuit goes dead: the thermostat loses power and the unit will not respond to any call.

Specifications

Spec	Value
Part Number	1173691 (Transformer), 1178431 (24V Barrier)
Description	Transformer 208/230 to 24V 40VA with Barrier
Type	Control Transformer
Brand	ICP / Tempstar / Heil
Rating	40 VA
Primary Voltage	208/230V
Secondary Voltage	24V
Fitment	OEM Direct Replacement

Compatibility

A direct OEM replacement for the ICP, Tempstar, Heil and Comfortmaker WPG4244040LKB1 packaged unit. Verify primary voltage tap and secondary load (40VA) against your existing transformer before installing.

Installation Guide

Safety First — Disconnect power at the disconnect and breaker, then verify zero voltage with a multimeter.
Access — Remove the control-compartment service panel.
Document — Photograph the primary and secondary wiring and the barrier position before disconnecting.
Remove — Label and disconnect the primary and 24V secondary leads, then unbolt the transformer from its bracket.
Install — Mount the new transformer, install the 24V barrier, and reconnect primary and secondary leads per your photo and the correct voltage tap.
Test — Restore power and confirm 24V at the secondary and a powered thermostat.

Signs You Need a Replacement

Blank or unpowered thermostat with line voltage present
No response to any heating or cooling call
Measured 0V on the 24V secondary terminals
Burnt smell, scorched windings, or a tripped internal 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 40VA Transformer for WPG4244...

$44.20

Frequently Asked Questions

Does this Transformer fit my ICP WPG4244040LKB1 — 208/230 to 24V | Ships Today?

Yes. This is the factory-specified OEM transformer for the ICP WPG4244040LKB1 — 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 WPG4244040LKB1 — 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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