What are the specs for this Transformer?

The correct replacement for ICP model WAHA36074A1 — 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 WAHA36074A1 — 208/230V to 24V | Ships Today.

ICP

ICP 40VA Transformer for WAHA36074A1 — 208/230V to 24V | Ships Today

Name: ICP 40VA Transformer for WAHA36074A1 — 208/230V to 24V | Ships Today
Brand: ICP
SKU: 1173844-GEN
Price: 26.00 USD
Availability: InStock

SKU: 1173844-GEN Brand: ICP

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Overview

This OEM low-voltage control transformer (part number 1173844) steps 208/230V line power down to 24V for the control circuit of your ICP WAHA36074A1 air handler. Rated at 40VA, it supplies power to the thermostat, contactor coil, control board, and other 24V components. When the transformer fails, the system loses low-voltage control: the thermostat goes dark, the blower and condenser will not energize, and a low-voltage fuse may blow. A buzzing or overheating transformer is also on its way out. Installing the correct 40VA OEM unit restores stable control power without overloading the circuit.

Specifications

Spec	Value
Part Number	1173844
Type	Step-Down Control Transformer
Brand	ICP
Primary Voltage	208/230V
Secondary Voltage	24V
Rating	40VA

Compatibility

Engineered for the ICP / Tempstar / Heil WAHA36074A1 air handler and other WAHA-series units that share the same 208/230V to 24V, 40VA control transformer. Confirm OEM part number 1173844 against your existing unit before ordering.

Installation Guide

Safety First — Disconnect power at the breaker and verify zero voltage with a multimeter before touching any wiring.
Access — Remove the air handler service panel to reach the control compartment.
Document — Photograph all primary and secondary wire connections before disconnecting anything.
Remove — Disconnect the primary (line) and secondary (24V) leads, then unbolt the failed transformer from the bracket.
Install — Mount the new transformer and reconnect the primary and secondary leads per your photo, matching the 208/230V taps.
Test — Restore power and verify 24V across the secondary terminals and normal system operation.

Signs You Need a Replacement

Thermostat screen is blank and the system will not start
Repeatedly blown 3A/5A low-voltage control fuse
No 24V reading at the secondary terminals under load
Transformer is buzzing, overheating, or smells burnt

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 WAHA360...

$26.00

Frequently Asked Questions

Does this Transformer fit my ICP WAHA36074A1 — 208/230V to 24V | Ships Today?

Yes. This is the factory-specified OEM transformer for the ICP WAHA36074A1 — 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 WAHA36074A1 — 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.

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