What are the specs for this Transformer?

The correct replacement for ICP model WAHT304B1 — 208/230V to 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 WAHT304B1 — 208/230V to 24V | Ships Today.

ICP

ICP 40VA Transformer for WAHT304B1 — 208/230V to 24V | Ships Today

Name: ICP 40VA Transformer for WAHT304B1 — 208/230V to 24V | Ships Today
Brand: ICP
SKU: 1172028
Price: 41.60 USD
Availability: InStock

SKU: 1172028 Brand: ICP

OEM Guaranteed

Same-Day Ship

30-Day Returns

Secure Checkout

Texas CMBL #19328542014

SAM.gov Registered

Govt POs Accepted

Overview

This OEM ICP control transformer (part number 1172028) converts 208/230V line voltage into the 24V low-voltage power that operates the thermostat, control board, and relays on the WAHT304B1 air handler. Rated at 40VA, it feeds the entire low-voltage control circuit. A failed transformer leaves the system completely unresponsive — no thermostat display, no blower, and no reaction to any call for heat or cooling. The usual cause is a shorted thermostat wire or an overloaded secondary that burns out the internal winding. Installing the correct 40VA OEM transformer restores 24V control power and brings the system back online.

Specifications

Spec	Value
Part Number	1172028
Type	Step-Down Control Transformer
Brand	ICP (Tempstar / Heil / Comfortmaker)
Primary Voltage	208/230V
Secondary Voltage	24V
Rating	40VA

Compatibility

Factory replacement for the ICP / Tempstar / Heil WAHT304B1 air handler and equivalent Comfortmaker fan coil units running a 208/230V primary. The 40VA rating matches the original control load. Verify part number 1172028 and the 208/230-to-24V configuration against your existing transformer before installing.

Installation Guide

Safety First — Disconnect power at the breaker and verify zero voltage with a multimeter before handling any leads.
Access — Remove the air handler service panel to reach the transformer.
Document — Photograph the primary and secondary wire connections before disconnecting.
Remove — Disconnect the primary and secondary leads, remove the mounting screws, and take out the failed transformer.
Install — Mount the new transformer, matching the correct primary tap (208 vs 230V), and reconnect leads per your photo.
Test — Restore power and confirm 24V at the secondary and normal thermostat operation.

Signs You Need a Replacement

Completely dead system — no thermostat display and no blower
No 24V reading at the transformer secondary terminals
Burnt smell or discoloration on the transformer body
Low-voltage circuit keeps tripping after a wiring short

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 WAHT304...

$41.60

Frequently Asked Questions

Does this Transformer fit my ICP WAHT304B1 — 208/230V to 24V | Ships Today?

Yes. This is the factory-specified OEM transformer for the ICP WAHT304B1 — 208/230V to 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 WAHT304B1 — 208/230V to 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.

Menu