What are the specs for this Transformer?

The correct replacement for ICP model WFML070A036B1 — Class 2 | 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 WFML070A036B1 — Class 2 | Ships Today.

ICP

ICP 40VA Transformer 120/24V for WFML070A036B1 — Class 2 | Ships Today

Name: ICP 40VA Transformer 120/24V for WFML070A036B1 — Class 2 | Ships Today
Brand: ICP
SKU: 1177217-GEN
Price: 28.95 USD
Availability: InStock

SKU: 1177217-GEN Brand: ICP

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Overview

This OEM 40VA control transformer (OEM 1177217) steps 120V line voltage down to the 24V control voltage that powers the ICP/Tempstar/Heil WFML070A036B1 furnace's low-voltage circuit — thermostat, gas valve, relays, and the integrated furnace control. Rated 40VA at 120 primary / 24V secondary, it is a Class 2 control transformer. When a transformer fails (open winding or a short caused by a downstream fault), the furnace goes completely dead at the thermostat: no display, no call for heat, and no response from the control board. Replacing the transformer restores 24V power to the entire control system.

Specifications

Spec	Value
Part Number	1177217
Type	Control Transformer (Class 2)
Rating	40VA
Voltage	120V Primary / 24V Secondary
Brand	ICP / Tempstar / Heil
Fitment	OEM

Compatibility

Designed for the ICP/Tempstar/Heil WFML070A036B1 furnace and related platform models using a 40VA 120/24V control transformer. Confirm primary voltage and VA rating before ordering.

Installation Guide

Safety First — Disconnect power and verify zero voltage with a multimeter.
Access — Remove the control/junction panel to reach the transformer.
Document — Photograph all primary and secondary wire connections before disconnecting.
Remove — Disconnect the leads, remove the mounting screws, and take out the failed transformer.
Install — Mount the new transformer, wire 120V to the primary and 24V leads to the secondary exactly per your photo.
Test — Restore power and confirm 24V at the secondary and a live thermostat.

Signs You Need a Replacement

Thermostat is blank and the furnace is completely unresponsive.
No 24V reading at the secondary terminals.
Burnt smell or visible scorching on the transformer body.
Repeated blown low-voltage fuse traced to the transformer.

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 120/24V for...

$28.95

Frequently Asked Questions

Does this Transformer fit my ICP WFML070A036B1 — Class 2 | Ships Today?

Yes. This is the factory-specified OEM transformer for the ICP WFML070A036B1 — Class 2 | 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 WFML070A036B1 — Class 2 | 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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