What are the specs for this Transformer?

The correct replacement for ICP model WFML045A024B2 — 40VA 120/24V | 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 WFML045A024B2 — 40VA 120/24V | Ships Today.

ICP

ICP Transformer for WFML045A024B2 — 40VA 120/24V | Ships Today

Name: ICP Transformer for WFML045A024B2 — 40VA 120/24V | Ships Today
Brand: ICP
SKU: 1177217
Price: 37.64 USD
Availability: InStock

SKU: 1177217 Brand: ICP

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Overview

This OEM transformer (part #1177217) supplies low-voltage control power for the ICP Tempstar Heil WFML045A024B2 furnace. Rated at 40VA, it steps 120V line voltage down to the 24V signal that operates the thermostat, gas valve, igniter circuit, and blower relays. A failed transformer kills the entire low-voltage system, leaving the furnace completely unresponsive. Failures are typically caused by a shorted control wire or a stuck relay drawing excessive current.

Specifications

Spec	Value
Part Number	1177217
Type	Step-Down Transformer
Brand	ICP
Rating	40VA
Primary Voltage	120V
Secondary Voltage	24V

Compatibility

Directly fits the ICP Tempstar Heil WFML045A024B2 furnace and shares the same low-voltage platform as many ICP-family gas furnaces (Tempstar, Heil, Comfortmaker). Confirm the 40VA rating and 120/24V configuration match your existing unit.

Installation Guide

Safety First — Disconnect power at the furnace switch and breaker, then verify zero voltage with a multimeter.
Access — Remove the furnace control/blower access panel.
Document — Photograph all primary and secondary wire connections before disconnecting.
Remove — Disconnect the primary (line) and secondary (24V) leads, then unbolt the transformer from its bracket.
Install — Mount the new transformer and reconnect the primary and secondary leads exactly per your photo.
Test — Restore power and confirm 24V at the secondary terminals and normal thermostat response.

Signs You Need a Replacement

Furnace completely dead — no blower, no ignition, blank thermostat
No 24V reading at the secondary terminals
Scorching, melted housing, or a burnt smell at the transformer
Repeated control-circuit fuse failures

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 Transformer for WFML045A024B...

$37.64

Frequently Asked Questions

Does this Transformer fit my ICP WFML045A024B2 — 40VA 120/24V | Ships Today?

Yes. This is the factory-specified OEM transformer for the ICP WFML045A024B2 — 40VA 120/24V | 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 WFML045A024B2 — 40VA 120/24V | 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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