What are the specs for this Transformer?

The correct replacement for ICP model WFAR040A030C1 — 120V to 24V 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 WFAR040A030C1 — 120V to 24V Control | Ships Today.

ICP

ICP 40VA Transformer for WFAR040A030C1 — 120V to 24V Control | Ships Today

Name: ICP 40VA Transformer for WFAR040A030C1 — 120V to 24V Control | Ships Today
Brand: ICP
SKU: 1177217
Price: 37.70 USD
Availability: InStock

SKU: 1177217 Brand: ICP

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Overview

This OEM 40VA control transformer (OEM 1177217) steps the incoming 120V line voltage down to the 24V low-voltage power that runs the control circuit on your ICP / Tempstar / Heil WFAR040A030C1 furnace. The 24V output energizes the thermostat, gas valve, control board, and relays — without it, none of the control logic operates. A failed transformer is a common cause of a completely dead furnace: no thermostat display power, no response to a heat call, and no blower. Transformers fail from overload (a shorted gas valve or pinched thermostat wire), age, or a power surge.

Specifications

Spec	Value
Part Number	1177217
Type	Control Transformer
Rating	40VA
Primary Voltage	120V
Secondary Voltage	24V
Brand	ICP / Tempstar / Heil / Comfortmaker
Fits Model	WFAR040A030C1

Compatibility

Built for the ICP family WFAR040A030C1 furnace and the shared Tempstar, Heil, and Comfortmaker control circuits requiring a 40VA 120V-to-24V transformer. Confirm primary and secondary voltages and VA rating against your original before installing.

Installation Guide

Safety First — Disconnect power at the switch and breaker; verify zero voltage with a multimeter.
Access — Remove the control panel to reach the transformer.
Document — Photograph the primary (line) and secondary (24V) lead connections before disconnecting.
Remove — Disconnect all leads and unbolt the transformer from its bracket.
Install — Mount the new transformer and reconnect primary and secondary leads exactly per your photo.
Test — Restore power, measure 24V on the secondary, and confirm the thermostat and control board power up.

Signs You Need a Replacement

Furnace completely dead — no thermostat power
No 24V output measured on the secondary terminals
Burnt smell or visible scorching on the transformer
Repeated blown low-voltage fuse after ruling out shorts

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 WFAR040...

$37.70

Frequently Asked Questions

Does this Transformer fit my ICP WFAR040A030C1 — 120V to 24V Control | Ships Today?

Yes. This is the factory-specified OEM transformer for the ICP WFAR040A030C1 — 120V to 24V 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 WFAR040A030C1 — 120V to 24V 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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