What are the specs for this Transformer?

The correct replacement for ICP model SUP23M2401BIA — 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 SUP23M2401BIA — OEM | Ships Today.

ICP

ICP 40VA 120V to 24V Transformer for SUP23M2401BIA — OEM | Ships Today

Name: ICP 40VA 120V to 24V Transformer for SUP23M2401BIA — OEM | Ships Today
Brand: ICP
SKU: L01H009-GEN
Price: 38.95 USD
Availability: InStock

SKU: L01H009-GEN Brand: ICP

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Overview

This OEM control assembly for the ICP/Tempstar/Heil SUP23M2401BIA includes the 40VA step-down transformer (L01F009, TRANS 120>24 40VA) and the matching 24VAC control relay (L01H009, AG90-23242-024W). The transformer converts 120VAC line power to the 24VAC the thermostat and control circuit require, while the relay switches the high-voltage load on a control call. A failed transformer leaves the system completely dead with no 24V at the thermostat; a failed relay prevents the load from energizing. Genuine OEM parts restore the correct 40VA secondary supply and reliable 24VAC switching.

Specifications

Spec	Value
Part Numbers	L01F009 (Transformer), L01H009 (Relay)
Type	Step-Down Control Transformer / 24VAC Relay
Brand	ICP / Tempstar / Heil
Primary Voltage	120VAC
Secondary Voltage	24VAC
VA Rating	40VA
Relay	24VAC (AG90-23242-024W)
Fits Model	SUP23M2401BIA
Fit	OEM Direct Replacement

Compatibility

Direct-fit replacement for the ICP/Tempstar/Heil SUP23M2401BIA. Verify your existing transformer's primary (120VAC), secondary (24VAC), and 40VA rating before installing.

Installation Guide

Safety First — Disconnect power at the disconnect and breaker, then verify zero voltage with a multimeter.
Access — Remove the service panel to reach the control box.
Document — Photograph the transformer and relay wiring before disconnecting.
Remove — Label and disconnect the primary and secondary leads, unbolt the failed component, and remove it.
Install — Mount the new transformer/relay, reconnect each lead per your photo, and confirm tight terminals.
Test — Restore power and verify 24VAC at the secondary and that the relay pulls in on a control call.

Signs You Need a Replacement

No 24V at the thermostat — system completely dead
Blown low-voltage fuse or burnt transformer smell
Chattering or non-latching control relay
Intermittent loss of control power

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 120V to 24V Transformer...

$38.95

Frequently Asked Questions

Does this Transformer fit my ICP SUP23M2401BIA — OEM | Ships Today?

Yes. This is the factory-specified OEM transformer for the ICP SUP23M2401BIA — 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 SUP23M2401BIA — 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.

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