What are the specs for this Transformer?

The correct replacement for ICP model WFMR070A024B2 — OEM 1177217 | 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 WFMR070A024B2 — OEM 1177217 | Ships Today.

ICP

ICP 40VA Transformer 120V to 24V for WFMR070A024B2 — OEM 1177217 | Ships Today

Name: ICP 40VA Transformer 120V to 24V for WFMR070A024B2 — OEM 1177217 | Ships Today
Brand: ICP
SKU: 1177217-GEN
Price: 29.00 USD
Availability: InStock

SKU: 1177217-GEN Brand: ICP

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Overview

This OEM 40VA control transformer (part 1177217) steps the furnace's 120V line voltage down to the 24V control voltage used by the thermostat, gas valve, control board, and relays on the ICP / Tempstar / Heil WFMR070A024B2. Rated at 40VA with a 120V primary and 24V secondary, it supplies the low-voltage control circuit that runs the entire sequence of operation. When a transformer fails — usually from a shorted control wire, a stuck contactor, or simple age — you lose all 24V control power: a blank thermostat, no response on a call for heat, or a repeatedly blown low-voltage fuse. Replacing it restores control power and brings the furnace back online.

Specifications

Spec	Value
Part Number	1177217
Type	Control Transformer
Rating	40 VA
Primary Voltage	120V
Secondary Voltage	24V
Brand	ICP / Tempstar / Heil
Fits Model	WFMR070A024B2

Compatibility

Direct OEM fit for the ICP-family WFMR070A024B2 furnace and its Tempstar, Heil, and Comfortmaker badge equivalents. Confirm 40VA rating and 120V/24V configuration against your existing transformer before installing.

Installation Guide

Safety First — Disconnect power at the furnace switch and breaker and verify zero voltage with a multimeter.
Access — Remove the control-compartment service panel.
Document — Photograph all primary (line) and secondary (24V) leads before disconnecting.
Remove — Disconnect the primary and secondary leads, then unbolt the transformer from its mount.
Install — Mount the new transformer, connect the 120V primary and 24V secondary leads per your photo, and check for any shorted control wiring that may have caused the failure.
Test — Restore power, confirm 24V at the secondary with a meter, and verify the thermostat powers up and the furnace responds to a call for heat.

Signs You Need a Replacement

Thermostat display is blank with no battery issue
No response from the furnace on a call for heat
Low-voltage fuse blows repeatedly
No 24V reading at the transformer secondary

Shipping & Returns

Ships same day on orders placed before 3 PM CST. 30-day hassle-free 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 120V to 24V...

$29.00

Frequently Asked Questions

Does this Transformer fit my ICP WFMR070A024B2 — OEM 1177217 | Ships Today?

Yes. This is the factory-specified OEM transformer for the ICP WFMR070A024B2 — OEM 1177217 | 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 WFMR070A024B2 — OEM 1177217 | 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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