ICP 40VA Transformer for WPH3422000RKA1 — 24V Control Circuit | Ships Today

Overview

This OEM transformer supplies the 24-volt control power that runs the contactor coil, reversing-valve solenoid, and low-voltage relays on your ICP/Tempstar/Heil WPH3422000RKA1 heat pump. It steps the incoming line voltage down to a stable 24V, 40VA secondary output that energizes the entire control circuit. When a transformer fails, the system goes completely dead at the thermostat — no cooling, no heating, no contactor pull-in — even though high-voltage power is still present at the unit. A buzzing, scorched, or open-winding transformer is a common and inexpensive failure that mimics far more serious faults.

Specifications

Compatibility

Engineered for the ICP WPH3422000RKA1 heat pump and shared across many Tempstar, Heil, and Comfortmaker units built on the same low-voltage control platform. Always confirm your secondary VA and voltage match before installing.

Installation Guide

1. Safety First — Disconnect power at the breaker and verify zero voltage with a multimeter.
2. Access — Remove the control-panel service cover.
3. Document — Photograph all primary and secondary wire connections before disconnecting.
4. Remove — Disconnect the line-voltage primary leads and 24V secondary leads, then unbolt the failed transformer from the panel.
5. Install — Mount the new transformer, reconnect primary and secondary wiring per your photo.
6. Test — Restore power and confirm a steady 24V reading at the secondary terminals.

Signs You Need a Replacement

• System is completely unresponsive at the thermostat
• Contactor will not pull in despite a cooling call
• Audible buzzing from the control transformer
• No 24V reading across the secondary terminals

Shipping & Returns

Ships same day before 3 PM CST. 30-day returns. Backed by the National HVAC Parts fitment guarantee.