What are the specs for this Transformer?

The correct replacement for ICP model WFML070A024B3 - 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 WFML070A024B3 - 40VA 120/24V | Ships Today.

ICP

ICP Control Transformer for WFML070A024B3 - 40VA 120/24V | Ships Today

Name: ICP Control Transformer for WFML070A024B3 - 40VA 120/24V | Ships Today
Brand: ICP
SKU: 1177217
Price: 41.60 USD
Availability: InStock

SKU: 1177217 Brand: ICP

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Overview

This OEM control transformer (part number 1177217) supplies low-voltage 24V control power for your ICP WFML070A024B3 gas furnace. Rated at 40VA, it steps the 120V line voltage down to the 24V required by the thermostat, gas valve, igniter circuit, and control board. When a transformer fails, the entire 24V control circuit goes dead: the thermostat screen may go blank, the furnace will not respond to a call for heat, and the control board shows no power. A buzzing, overheated, or visibly scorched transformer is a clear sign of failure, often caused by a shorted control wire or a failed contactor coil drawing excessive current.

Specifications

Spec	Value
Part Number	1177217
Type	Control / Step-Down Transformer
Brand	ICP (Tempstar / Heil)
Rating	40 VA
Primary Voltage	120 V
Secondary Voltage	24 V

Compatibility

Designed as a direct OEM fit for the ICP / Tempstar / Heil WFML070A024B3 furnace. The 40VA 120/24V rating is shared across many ICP-family furnaces and air handlers, making this a common replacement across the WFML platform.

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 compartment service panel.
Document - Photograph all primary and secondary wire connections before disconnecting.
Remove - Disconnect the 120V primary and 24V secondary leads, then unbolt the transformer from the mounting bracket.
Install - Mount the new transformer, reconnect the primary and secondary leads exactly per your photo.
Test - Restore power and confirm 24V across the secondary terminals and a normal call for heat.

Signs You Need a Replacement

Blank or unpowered thermostat with the furnace breaker on
No 24V control voltage at the board or gas valve
Buzzing, humming, or overheated transformer body
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 Control Transformer for WFML...

$41.60

Frequently Asked Questions

Does this Transformer fit my ICP WFML070A024B3 - 40VA 120/24V | Ships Today?

Yes. This is the factory-specified OEM transformer for the ICP WFML070A024B3 - 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 WFML070A024B3 - 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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