What are the specs for this Transformer?

The correct replacement for ICP model WJH342000KTP0A2 - 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 WJH342000KTP0A2 - 208/230V to 24V | Ships Today.

ICP

ICP 40VA Transformer for WJH342000KTP0A2 - 208/230V to 24V | Ships Today

Name: ICP 40VA Transformer for WJH342000KTP0A2 - 208/230V to 24V | Ships Today
Brand: ICP
SKU: 1176032-GEN
Price: 34.00 USD
Availability: InStock

SKU: 1176032-GEN Brand: ICP

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Overview

This OEM 40VA control transformer (part number 1173691) supplies the 24V low-voltage power that runs the entire control circuit of the ICP/Heil/Tempstar WJH342000KTP0A2 heat pump. It steps 208/230V line voltage down to 24V to energize the thermostat, contactor coil, reversing-valve coil, and safety controls. When a transformer fails, the system goes completely dead at the low-voltage side: no thermostat display, no contactor pull-in, and no response to a call for heating or cooling. Transformers fail from a shorted control wire, a shorted coil, or sustained overload. This unit is rated at 40VA to carry the full control load of the WJH342000KTP0A2 reversing-valve heat pump system.

Specifications

Spec	Value
OEM Part Number	1173691
Type	Step-Down Control Transformer
Brand	ICP / Heil / Tempstar
Rating	40 VA
Primary Voltage	208/230V
Secondary Voltage	24V
Related OEM Parts	1176032 (24V Barrier), 1172619 (Rev Valve Coil 24V), 1173708 (Reversing Valve w/Coil 24V)

Compatibility

Direct OEM replacement for the ICP/Heil/Tempstar WJH342000KTP0A2 heat pump control circuit. The 208/230V-to-24V, 40VA configuration is a common service transformer across many residential heat pump and air handler boards. Verify primary and secondary voltage and VA rating against the original before installing.

Installation Guide

Safety First - Disconnect power at the breaker and verify zero voltage at the transformer primary leads with a multimeter.
Access - Remove the control/electrical panel to reach the transformer.
Document - Photograph all primary and secondary wire connections before disconnecting.
Remove - Disconnect the line-voltage primary leads and 24V secondary leads; unbolt the old transformer.
Install - Mount the new transformer, match the primary tap to your supply voltage, and reconnect per your photo.
Test - Restore power and confirm 24V at the secondary terminals and normal thermostat/contactor operation.

Signs You Need a Replacement

Thermostat is blank and the system is completely unresponsive.
No 24V reading at the secondary terminals with primary power present.
Repeatedly blown low-voltage fuse or burnt-smelling transformer.
Contactor and reversing valve coils will not energize on a call.

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...

$34.00

Frequently Asked Questions

Does this Transformer fit my ICP WJH342000KTP0A2 - 208/230V to 24V | Ships Today?

Yes. This is the factory-specified OEM transformer for the ICP WJH342000KTP0A2 - 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 WJH342000KTP0A2 - 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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