What are the specs for this Transformer?

The correct replacement for ICP model WPG4484115LKB1 — 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 WPG4484115LKB1 — 208/230V to 24V | Ships Today.

ICP

ICP 40VA Transformer for WPG4484115LKB1 — 208/230V to 24V | Ships Today

Name: ICP 40VA Transformer for WPG4484115LKB1 — 208/230V to 24V | Ships Today
Brand: ICP
SKU: 1178431-GEN
Price: 32.95 USD
Availability: InStock

SKU: 1178431-GEN Brand: ICP

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Overview

This genuine OEM 40VA control transformer (part 1173691) steps 208/230V line voltage down to the 24V control voltage that powers the thermostat, gas valve, contactor coil, and control board on your ICP Tempstar/Heil WPG4484115LKB1 unit. It ships with the matching 24V barrier/cover (part 1178431). The transformer is the heart of the low-voltage control circuit — without a clean 24V output, nothing in the control sequence can energize. A 40VA rating provides the current needed to pull in the system's relays and valves without overheating.

Specifications

Spec	Value
Part Number	1173691 (transformer), 1178431 (24V barrier)
Type	Control / Class 2 Step-Down Transformer
Brand	ICP / Tempstar / Heil
Rating	40 VA
Primary Voltage	208/230V
Secondary Voltage	24V

Compatibility

Direct-fit replacement for the ICP Tempstar Heil WPG4484115LKB1 and related packaged units using OEM transformer 1173691 with barrier 1178431. Confirm your existing primary tap (208 vs 230) and secondary voltage before installing.

Installation Guide

Safety First — Disconnect power and verify zero voltage with a multimeter.
Access — Remove the service/control panel.
Document — Photograph the primary and secondary wiring before disconnecting.
Remove — Disconnect the line- and low-voltage leads and unbolt the old transformer.
Install — Mount the new transformer with its 24V barrier, then wire the primary taps and 24V secondary per your photo.
Test — Restore power and confirm a steady 24V across the secondary terminals.

Signs You Need a Replacement

No 24V at the thermostat, gas valve, or contactor
Blown low-voltage fuse that recurs after reset
Burnt smell or visibly charred transformer windings
System completely dead while line voltage is confirmed present

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 WPG4484...

$32.95

Frequently Asked Questions

Does this Transformer fit my ICP WPG4484115LKB1 — 208/230V to 24V | Ships Today?

Yes. This is the factory-specified OEM transformer for the ICP WPG4484115LKB1 — 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 WPG4484115LKB1 — 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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