What are the specs for this Transformer?

The correct replacement for ICP model WFAR100C048B1 — 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 WFAR100C048B1 — 120-24V | Ships Today.

ICP

ICP 40VA Transformer for WFAR100C048B1 — 120-24V | Ships Today

Name: ICP 40VA Transformer for WFAR100C048B1 — 120-24V | Ships Today
Brand: ICP
SKU: 1177217
Price: 36.34 USD
Availability: InStock

SKU: 1177217 Brand: ICP

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Overview

This is a genuine OEM 40VA control transformer (part number 1177217) for the ICP/Tempstar/Heil WFAR100C048B1. It steps the 120-volt line voltage down to the 24-volt control voltage that powers the thermostat, control board, gas valve, igniter circuit, and relays. A failed transformer is one of the most common causes of a completely dead control system: no thermostat display, no call for heat or cool, and no 24V at the board. The 40VA rating provides the current capacity needed to drive multiple control loads simultaneously. Replacing a shorted or open transformer restores low-voltage power and brings the system back online.

Specifications

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

Compatibility

Direct-fit replacement for the ICP/Tempstar/Heil WFAR100C048B1 and other ICP-family furnaces and air handlers using a 120V-to-24V, 40VA control transformer. Verify primary voltage and VA rating against your original before installing.

Installation Guide

Safety First — Disconnect power at the breaker and verify zero voltage with a multimeter.
Access — Remove the control/junction box cover.
Document — Photograph the primary (line) and secondary (24V) wiring before disconnecting.
Remove — Disconnect leads, unbolt the transformer from its bracket, and lift it out.
Install — Mount the new transformer, reconnect the 120V primary and 24V secondary leads per your photo.
Test — Restore power and confirm 24V across the secondary terminals.

Signs You Need a Replacement

Blank thermostat with no 24V at the board
System completely unresponsive to any call
Burnt smell or visibly charred transformer windings
Repeatedly blown low-voltage fuse after wiring is verified

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 for WFAR100...

$36.34

Frequently Asked Questions

Does this Transformer fit my ICP WFAR100C048B1 — 120-24V | Ships Today?

Yes. This is the factory-specified OEM transformer for the ICP WFAR100C048B1 — 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 WFAR100C048B1 — 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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