What are the specs for this Transformer?

The correct replacement for ICP model WAMA24004AT2 — 24V 40VA Class II | 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 WAMA24004AT2 — 24V 40VA Class II | Ships Today.

ICP

ICP Transformer for WAMA24004AT2 — 24V 40VA Class II | Ships Today

Name: ICP Transformer for WAMA24004AT2 — 24V 40VA Class II | Ships Today
Brand: ICP
SKU: 202300900212
Price: 32.44 USD
Availability: InStock

SKU: 202300900212 Brand: ICP

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Overview

This OEM 24-volt control transformer (Part No. 202300900212) is the low-voltage power source for the control circuit of your ICP / Tempstar / Heil WAMA24004AT2 unit. It steps line voltage down to the 24V class II signal that powers the thermostat, contactor coil, control board, and safety switches. Rated at 40VA, it delivers stable, consistent power to every low-voltage component in the system. Transformers fail from a shorted secondary, an overloaded control circuit, or age-related winding breakdown. When one fails the entire control side goes dead — a blank or unresponsive thermostat, a contactor that won't pull in, no call for heating or cooling, and often a blown low-voltage fuse on the control board.

Specifications

Spec	Value
OEM Part Number	202300900212
Description	Transformer 24V
Type	Class II Step-Down Control Transformer
Brand	ICP / Tempstar / Heil
Secondary Voltage	24V
Rating	40VA
Fits Model	WAMA24004AT2

Compatibility

Direct OEM-fit replacement for the ICP / Tempstar / Heil WAMA24004AT2. The same 24V control transformer is shared across many units in the WAMA family. Confirm the part number against your existing transformer before installing.

Installation Guide

Safety First — Disconnect power at the breaker/disconnect and verify zero voltage with a multimeter before touching any wiring.
Access — Remove the service/control panel to expose the control compartment.
Document — Photograph all primary and secondary leads before disconnecting.
Remove — Label and disconnect the line-voltage primary and 24V secondary leads, then unbolt the old transformer.
Install — Mount the new transformer, match the primary tap to your supply voltage, and reconnect each lead per your photo.
Test — Restore power and confirm 24V across the secondary terminals and normal system operation.

Signs You Need a Replacement

Thermostat is blank or completely unresponsive.
Contactor will not energize and the system never starts.
Repeatedly blown low-voltage control fuse.
No measurable 24V at the secondary terminals.

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 WAMA24004AT2...

$32.44

Frequently Asked Questions

Does this Transformer fit my ICP WAMA24004AT2 — 24V 40VA Class II | Ships Today?

Yes. This is the factory-specified OEM transformer for the ICP WAMA24004AT2 — 24V 40VA Class II | 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 WAMA24004AT2 — 24V 40VA Class II | 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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