Tempstar 40VA Transformer for TCA936GKA200 — 208/230V to 24V | Ships Today

Overview

This OEM control transformer (part 1170676) supplies the 24-volt control power for the Tempstar TCA936GKA200. It steps the 208/230V line voltage down to 24V at 40VA — enough capacity to drive the contactor coil, control board, and other low-voltage components. When a transformer fails (open primary, shorted winding, or a blown internal fuse link), the entire low-voltage circuit goes dead and the unit will not respond to a cooling call. Installing the correct 40VA OEM-spec transformer restores stable control voltage and protects downstream components.

Specifications

Compatibility

Direct-fit replacement for the Tempstar TCA936GKA200 and shared ICP/Heil/Comfortmaker platforms requiring a 208/230V-to-24V 40VA transformer. Verify primary tap voltage and VA rating before installing.

Installation Guide

1. Safety First — Disconnect power and verify zero voltage with a multimeter.
2. Access — Remove the control compartment / service panel.
3. Document — Photograph the primary and secondary wiring before disconnecting.
4. Remove — Label the leads, disconnect them, and unbolt the old transformer.
5. Install — Mount the new transformer, wire the correct primary tap (208 or 230V) and the 24V secondary per your photo.
6. Test — Restore power and confirm ~24V across the secondary and normal unit operation.

Signs You Need a Replacement

• No 24V at the secondary terminals
• Unit completely unresponsive to thermostat calls
• Burnt smell or visible scorching on the transformer
• Repeated control-fuse blowing tied to the transformer

Shipping & Returns

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