What are the specs for this Transformer?

The correct replacement for ICP model WFAR120D066B2 — 40VA 120/24V OEM | 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 WFAR120D066B2 — 40VA 120/24V OEM | Ships Today.

ICP

ICP Transformer for WFAR120D066B2 — 40VA 120/24V OEM | Ships Today

Name: ICP Transformer for WFAR120D066B2 — 40VA 120/24V OEM | Ships Today
Brand: ICP
SKU: 1177217
Price: 37.70 USD
Availability: InStock

SKU: 1177217 Brand: ICP

OEM Guaranteed

Same-Day Ship

30-Day Returns

Secure Checkout

Texas CMBL #19328542014

SAM.gov Registered

Govt POs Accepted

Overview

This 40VA control transformer (OEM part number 1177217) is the factory replacement for the ICP/Tempstar/Heil WFAR120D066B2 furnace. The transformer steps line voltage (120V) down to the 24V control voltage that powers the thermostat, control board, gas valve, igniter circuit, and relays. When it fails, the entire low-voltage control system goes dead — the thermostat blanks, the board loses 24V, and the furnace will not respond to a heat call. Transformers typically burn out from a 24V short, a seized load drawing excess current, or a voltage surge. This OEM-spec unit is rated at 40VA with a 120V primary and 24V secondary to match the original equipment exactly.

Specifications

Spec	Value
Part Number	1177217
Type	Control Transformer
Brand	ICP (Tempstar / Heil)
Rating	40 VA
Primary Voltage	120V
Secondary Voltage	24V
Fits Model	WFAR120D066B2

Compatibility

Engineered as the OEM replacement for the ICP/Tempstar/Heil WFAR120D066B2 furnace. Verify the primary voltage (120V), secondary voltage (24V), and 40VA rating against your existing transformer before installing. This is the factory-matched control transformer for that model.

Installation Guide

Safety First — Disconnect power at the breaker and verify zero voltage with a multimeter on both primary and secondary leads.
Access — Remove the control compartment service panel.
Document — Photograph the primary and secondary wire connections before disconnecting.
Remove — Disconnect the leads, then unscrew or unclip the transformer from its mounting bracket.
Install — Mount the new transformer, land the 120V primary and 24V secondary leads exactly per your photo, and confirm no bare conductors contact the cabinet.
Test — Restore power and confirm 24V across the secondary and a live thermostat display.

Signs You Need a Replacement

Blank thermostat or fully dead low-voltage controls
No 24V reading across the secondary terminals
Burnt smell or scorched transformer housing
Control circuit fails again after a short was 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 Transformer for WFAR120D066B...

$37.70

Frequently Asked Questions

Does this Transformer fit my ICP WFAR120D066B2 — 40VA 120/24V OEM | Ships Today?

Yes. This is the factory-specified OEM transformer for the ICP WFAR120D066B2 — 40VA 120/24V OEM | 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 WFAR120D066B2 — 40VA 120/24V OEM | 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.

Menu