ICP 40VA Transformer 208/230V to 24V for WJA330000KTP0A1 — OEM 1173691 w/ Barrier | Ships Today

Overview

This OEM control transformer kit, primary OEM part number 1173691 (TRANS 208/230>24 40VA) with the matching OEM 1176032 24V barrier, powers the 24-volt low-voltage control circuit on the ICP/Tempstar/Heil WJA330000KTP0A1 system. The transformer steps 208/230V line power down to 24V to drive the contactor coil, control board, and thermostat circuit; the barrier provides required low-voltage separation and terminal protection. When the transformer fails you lose all 24V control — no contactor pull-in, a dead thermostat, and a system that simply won't start even though line voltage is present.

Specifications

Compatibility

Built for the ICP/Tempstar/Heil model WJA330000KTP0A1 and related WJA-series units using a 40VA 208/230V-to-24V control transformer. Confirm your existing transformer is rated 40VA with a 208/230V primary before installing.

Installation Guide

1. Safety First — Disconnect power at the breaker and verify zero voltage at the line terminals with a multimeter.
2. Access — Remove the control-box / electrical service panel.
3. Document — Photograph all primary and secondary leads and the barrier position before disconnecting.
4. Remove — Disconnect the primary and 24V secondary wiring and unfasten the old transformer and barrier.
5. Install — Mount the new transformer and barrier, match the primary tap to your supply voltage, and reconnect the secondary per your photo.
6. Test — Restore power and confirm ~24V across the secondary and proper contactor/control operation.

Signs You Need a Replacement

• No 24V output measured across the secondary terminals.
• Contactor will not pull in and thermostat is unresponsive.
• Transformer is hot, buzzing, or visibly burned/discolored.
• Blown low-voltage fuse or repeated control-circuit faults.

Shipping & Returns

Ships same day on orders placed before 3 PM CST. 30-day returns on uninstalled parts. Backed by the National HVAC Parts fitment guarantee.