What are the specs for this Transformer?

The correct replacement for ICP model WFAR120D066B1 — OEM 120V to 24V Control Transformer | 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 WFAR120D066B1 — OEM 120V to 24V Control Transformer | Ships Today.

ICP

ICP 40VA Transformer for WFAR120D066B1 — OEM 120V to 24V Control Transformer | Ships Today

Name: ICP 40VA Transformer for WFAR120D066B1 — OEM 120V to 24V Control Transformer | 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, part number 1177217, steps down line voltage from 120V to 24V to power the low-voltage control circuit on the ICP Tempstar Heil WFAR120D066B1 furnace. The 24V output drives the thermostat, control board logic, gas valve, and relays. When a transformer fails — usually from a short in the control circuit or simple age — the furnace goes completely dead with no thermostat response and no ignition sequence. A blown transformer is a frequent cause of a totally unresponsive furnace, and replacing it restores 24V control power throughout the system.

Specifications

Spec	Value
Part Number	1177217
Type	Control Transformer
Rating	40VA
Primary Voltage	120V
Secondary Voltage	24V
Brand	ICP / Tempstar / Heil
Fits Model	WFAR120D066B1
Fit	OEM Direct Replacement

Compatibility

Built for the ICP Tempstar Heil WFAR120D066B1 furnace and compatible across ICP-family brands (Comfortmaker, Heil, Tempstar, Arcoaire) using a 40VA 120V-24V control transformer. Verify the VA rating and voltage taps on your existing transformer before ordering.

Installation Guide

Safety First — Disconnect power at the furnace switch and breaker, and verify zero voltage with a multimeter.
Access — Remove the furnace control compartment service panel.
Document — Photograph the primary (120V) and secondary (24V) wiring before disconnecting.
Remove — Disconnect the leads, remove the transformer mounting screws, and take out the old transformer.
Install — Mount the new transformer, connect the 120V primary and 24V secondary leads per your photo, and confirm correct tap selection.
Test — Restore power and use a multimeter to verify 24V at the secondary, then run a heat cycle.

Signs You Need a Replacement

Furnace is completely dead with no thermostat response
No 24V reading at the control board secondary terminals
Burnt smell or visibly scorched transformer housing
Repeated control-fuse failures after a short is cleared

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 WFAR120...

$28.95

Frequently Asked Questions

Does this Transformer fit my ICP WFAR120D066B1 — OEM 120V to 24V Control Transformer | Ships Today?

Yes. This is the factory-specified OEM transformer for the ICP WFAR120D066B1 — OEM 120V to 24V Control Transformer | 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 WFAR120D066B1 — OEM 120V to 24V Control Transformer | 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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