ICP 40VA Transformer for WPH3364000RKC1 — 24V Control Circuit | Ships Today

Overview

This OEM transformer delivers the 24-volt control power that operates the contactor coil, reversing-valve solenoid, and low-voltage relays on your ICP/Tempstar/Heil WPH3364000RKC1 heat pump. It steps line voltage down to a stable 24V, 40VA secondary output that feeds the entire control circuit. A failed transformer leaves the system completely dead at the thermostat — no cooling, no heating, and no contactor engagement — even though high-voltage power remains present. Buzzing, a burnt smell, or an open secondary winding are classic, low-cost transformer failures that can masquerade as much larger problems.

Specifications

Compatibility

Engineered for the ICP WPH3364000RKC1 heat pump and shared across many Tempstar, Heil, and Comfortmaker units on the same low-voltage control platform. Confirm 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.
5. Install — Mount the new transformer and 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 energize on a cooling or heating call
• Audible buzzing from the control transformer
• No 24V output measured across the secondary terminals

Shipping & Returns

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