What are the specs for this Transformer?

The correct replacement for ICP model WFMR090C048B1 — 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 WFMR090C048B1 — Furnace Control | Ships Today.

ICP

ICP 40VA Transformer 120/24V for WFMR090C048B1 — Furnace Control | Ships Today

Name: ICP 40VA Transformer 120/24V for WFMR090C048B1 — Furnace Control | Ships Today
Brand: ICP
SKU: 1177217
Price: 36.34 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 the 24V low-voltage power that runs your ICP/Tempstar/Heil WFMR090C048B1 furnace's control board, thermostat, gas valve, and relays. Rated at 40VA, it supplies ample current for the entire low-voltage circuit. A failed transformer leaves the system completely dead at the thermostat — no heat call, no fan, no display — and is a frequent casualty of shorted thermostat wiring or a seized contactor coil. Installing a fresh OEM transformer restores 24V control power and brings the system back to life.

Specifications

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

Compatibility

Designed for the ICP/Tempstar/Heil WFMR090C048B1 gas furnace and used across the WFMR090 family. Verify your existing transformer is a 120V-to-24V, 40VA unit before installing.

Installation Guide

Safety First — Disconnect power at the switch and breaker, then verify zero voltage with a multimeter.
Access — Remove the control/blower compartment service panel.
Document — Photograph the primary (line) and secondary (24V) wire connections before disconnecting.
Remove — Unscrew the transformer mounting bracket and disconnect all leads.
Install — Mount the new transformer and reconnect the 120V primary and 24V secondary leads exactly as photographed.
Test — Restore power and confirm 24V across the secondary and a normal thermostat call.

Signs You Need a Replacement

Thermostat screen is blank and system is completely unresponsive
No 24V measured at the secondary terminals
Burnt smell or visibly scorched transformer windings
Repeated control-fuse or board 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 40VA Transformer 120/24V for...

$36.34

Frequently Asked Questions

Does this Transformer fit my ICP WFMR090C048B1 — Furnace Control | Ships Today?

Yes. This is the factory-specified OEM transformer for the ICP WFMR090C048B1 — 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 WFMR090C048B1 — 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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