Tempstar 40VA Transformer 208/230V to 24V for TCA760GKA200 — Ships Today

Overview

This is a genuine OEM control transformer (part #1170676) for the Tempstar TCA760GKA200. It steps 208/230V line voltage down to the 24V used by the thermostat, contactor coil, control board, and safety switches, and is rated at 40VA to supply the full low-voltage control load. When a transformer fails — often from a shorted thermostat wire or a stuck contactor coil overloading it — the entire 24V control circuit goes dead. Symptoms include a blank thermostat, a system that won't respond to any call for heating or cooling, a blown low-voltage fuse, or a transformer that is hot, buzzing, or has a burnt smell.

Specifications

Compatibility

Designed for the Tempstar TCA760GKA200 and shared across ICP / Tempstar / Heil / Comfortmaker units specifying a 40VA 208/230V-to-24V control transformer. Verify VA rating and primary/secondary voltages against your existing transformer before ordering.

Installation Guide

1. Safety First — Disconnect power at the disconnect and breaker and verify zero voltage with a multimeter.
2. Access — Remove the service panel to reach the transformer and control wiring.
3. Document — Photograph the primary (line) and secondary (24V) leads before disconnecting.
4. Remove — Disconnect all leads and unbolt the old transformer from its bracket.
5. Install — Mount the new transformer and reconnect primary and secondary leads exactly per your photo.
6. Test — Restore power and confirm 24V at the secondary and normal thermostat/control operation.

Signs You Need a Replacement

• Blank thermostat or completely dead control circuit
• No response to any heating or cooling call
• Blown low-voltage fuse or no 24V at the secondary
• Transformer is hot, buzzing, or smells burnt

Shipping & Returns

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