What are the specs for this Transformer?

The correct replacement for ICP model WFMR090C048B3 — 40VA 120/24V Furnace Control | 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 WFMR090C048B3 — 40VA 120/24V Furnace Control | Ships Today.

ICP

ICP Transformer for WFMR090C048B3 — 40VA 120/24V Furnace Control | Ships Today

Name: ICP Transformer for WFMR090C048B3 — 40VA 120/24V Furnace Control | Ships Today
Brand: ICP
SKU: 1177217
Price: 36.40 USD
Availability: InStock

SKU: 1177217 Brand: ICP

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Overview

This OEM control transformer (part 1177217) steps the 120V line voltage down to 24V to power the low-voltage control circuit on the ICP Tempstar Heil WFMR090C048B3 furnace. It is a 40VA, 120-24V transformer that feeds the thermostat, control board, gas valve, and relays. When a transformer fails — often from a shorted thermostat wire or overloaded control circuit — the furnace goes completely dead with no 24V at the board. Replacing it restores control power and brings the system back online.

Specifications

Spec	Value
Part Number	1177217
Type	Control Transformer
Rating	40 VA
Primary Voltage	120V
Secondary Voltage	24V
Brand	ICP / Tempstar / Heil
Application	Furnace Control Circuit

Compatibility

Engineered for the ICP Tempstar Heil WFMR090C048B3 furnace and platform models using a 40VA 120-24V control transformer. Confirm primary voltage, VA rating, and terminal configuration against your existing transformer before installing.

Installation Guide

Safety First — Disconnect power at the service switch and verify zero voltage with a multimeter.
Access — Remove the control/electrical compartment panel.
Document — Photograph the primary (line) and secondary (24V) lead connections before disconnecting.
Remove — Disconnect the leads, unbolt the transformer from its bracket, and lift it out.
Install — Mount the new transformer, wire the 120V primary and 24V secondary per your photo, and secure all connections.
Test — Restore power and confirm 24V across the secondary terminals and normal control operation.

Signs You Need a Replacement

Furnace is completely dead with no thermostat response
No 24V measured at the control board or gas valve
Repeatedly blown low-voltage fuse on the board
Burnt smell or visibly scorched transformer windings

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 WFMR090C048B...

$36.40

Frequently Asked Questions

Does this Transformer fit my ICP WFMR090C048B3 — 40VA 120/24V Furnace Control | Ships Today?

Yes. This is the factory-specified OEM transformer for the ICP WFMR090C048B3 — 40VA 120/24V Furnace Control | 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 WFMR090C048B3 — 40VA 120/24V Furnace Control | 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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