What are the specs for this Transformer?

The correct replacement for ICP model WJH342000K000A1 — 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 WJH342000K000A1 — 208/230V to 24V | Ships Today.

ICP

ICP 40VA Transformer for WJH342000K000A1 — 208/230V to 24V | Ships Today

Name: ICP 40VA Transformer for WJH342000K000A1 — 208/230V to 24V | Ships Today
Brand: ICP
SKU: 1176032-GEN
Price: 29.95 USD
Availability: InStock

SKU: 1176032-GEN Brand: ICP

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Overview

This genuine OEM 40VA control transformer (part #1173691) steps the 208/230V line voltage of the ICP/Heil/Tempstar WJH342000K000A1 heat pump down to the 24V needed to power the contactor coil, reversing valve coil, and low-voltage control circuit. The transformer is the heart of the 24V control system — when it fails, the unit goes completely dead on a call because nothing in the low-voltage circuit can be energized. This listing covers the transformer and the associated 24V control components for this model, including the reversing valve coil (#1172619), the reversing valve with coil (#1173708), and the 24V barrier (#1176032). A 40VA rating provides ample capacity for the contactor and reversing valve loads.

Specifications

Spec	Value
Part Number	1173691 (TRANS 208/230>24 40VA)
Related Parts	1176032, 1172619, 1173708
Type	Step-Down Control Transformer
Brand	ICP / Heil / Tempstar
Primary Voltage	208/230V
Secondary Voltage	24V
Rating	40 VA

Compatibility

Factory replacement transformer for the ICP/Heil/Tempstar WJH342000K000A1 and heat pump units using a 208/230V-to-24V 40VA control transformer. Confirm primary voltage and VA rating before installing.

Installation Guide

Safety First — Disconnect power at the outdoor disconnect and verify zero voltage with a multimeter.
Access — Remove the service panel to reach the control box.
Document — Photograph the primary and secondary wiring before disconnecting.
Remove — Disconnect the leads, unscrew the old transformer from its mount.
Install — Mount the new transformer and reconnect primary and secondary wires per your photo.
Test — Restore power and confirm 24V across the secondary and proper contactor/reversing valve operation.

Signs You Need a Replacement

Unit is completely dead on a thermostat call.
No 24V reading across the transformer secondary.
Contactor and reversing valve coil won't energize.
Burnt smell or visible scorching on the transformer windings.

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 WJH3420...

$29.95

Frequently Asked Questions

Does this Transformer fit my ICP WJH342000K000A1 — 208/230V to 24V | Ships Today?

Yes. This is the factory-specified OEM transformer for the ICP WJH342000K000A1 — 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 WJH342000K000A1 — 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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