What are the specs for this Transformer?

The correct replacement for ICP model WJH330000K000A1 — 208/230V to 24V Heat Pump Control | 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 WJH330000K000A1 — 208/230V to 24V Heat Pump Control | Ships Today.

ICP

ICP 40VA Transformer for WJH330000K000A1 — 208/230V to 24V Heat Pump Control | Ships Today

Name: ICP 40VA Transformer for WJH330000K000A1 — 208/230V to 24V Heat Pump Control | Ships Today
Brand: ICP
SKU: 1176032
Price: 32.44 USD
Availability: InStock

SKU: 1176032 Brand: ICP

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Overview

This is the OEM 40VA control transformer (part #1173691) for the ICP/Heil/Tempstar WJH330000K000A1 heat pump. The transformer steps line voltage (208/230V) down to the 24V control voltage that powers the thermostat circuit, contactor coil, reversing valve solenoid, and defrost board. When a control transformer fails, the entire low-voltage control system goes dead — the system will not respond to the thermostat even though line power is present. Common failure signs include a no-call/no-response system, a tripped 24V fuse, a buzzing or scorched transformer, or 0 volts across the secondary (R to C) terminals. This 40VA rating provides enough VA headroom for the reversing-valve coil and contactor loads found in this heat pump.

Specifications

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

Compatibility

Fits the ICP/Heil/Tempstar/Comfortmaker WJH330000K000A1 heat pump and other units in this platform using a 208/230V-to-24V 40VA control transformer. Always confirm the primary/secondary voltage and VA rating against the unit you are servicing.

Installation Guide

Safety First — Disconnect power at the disconnect and breaker; verify zero voltage with a multimeter.
Access — Remove the control-panel service panel.
Document — Photograph all primary and secondary wire connections before disconnecting.
Remove — Disconnect the line-voltage primary leads and the 24V secondary leads, then unbolt the failed transformer from the bracket.
Install — Mount the new transformer, connect primary leads to the matching line voltage (208/230V) and secondary leads to the 24V control terminals per your photo.
Test — Restore power and confirm 24–28V across the R and C terminals; verify the system responds to a thermostat call.

Signs You Need a Replacement

No 24V control power / system completely unresponsive to the thermostat
Repeatedly blown 24V control fuse
Buzzing, overheating, or a burnt-smelling transformer
0V measured across the secondary (R–C) with line voltage present at the primary

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 WJH3300...

$32.44

Frequently Asked Questions

Does this Transformer fit my ICP WJH330000K000A1 — 208/230V to 24V Heat Pump Control | Ships Today?

Yes. This is the factory-specified OEM transformer for the ICP WJH330000K000A1 — 208/230V to 24V Heat Pump Control | 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 WJH330000K000A1 — 208/230V to 24V Heat Pump Control | 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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