Tempstar Transformer for TCA924GKA200 — 40VA 208/230 to 24V | Ships Today

Overview

This OEM control transformer (part number 1170676) steps down line voltage to the 24V control signal that runs the contactor, sequencers, and low-voltage circuits on your Tempstar TCA924GKA200 condensing unit. It accepts a 208/230V primary input and delivers a regulated 24V, 40VA secondary output. When a transformer fails, the entire low-voltage control circuit goes dead — the contactor won't pull in, the unit won't respond to a thermostat call, and you may smell burnt insulation or find a blown low-voltage fuse. Replacing it with the correct OEM-rated 40VA unit restores reliable control power without overloading the circuit.

Specifications

Compatibility

Designed for the Tempstar TCA924GKA200 and shared across the ICP / Heil / Comfortmaker family of condensing units and heat pumps that use the same 208/230V-to-24V 40VA control platform. Always confirm your existing transformer's VA rating and voltage taps before installing.

Installation Guide

1. Safety First — Disconnect power at the disconnect and breaker, then verify zero voltage with a multimeter at the unit.
2. Access — Remove the control panel cover to reach the transformer.
3. Document — Photograph every primary and secondary wire connection before disconnecting.
4. Remove — Label and disconnect the primary and secondary leads, then unbolt the old transformer from the panel.
5. Install — Mount the new transformer, match the primary leads to the correct 208 or 230 tap, and reconnect the secondary per your photo.
6. Test — Restore power and confirm 24V at the secondary and proper contactor pull-in on a thermostat call.

Signs You Need a Replacement

• No 24V control power and the contactor won't energize
• Repeatedly blown low-voltage fuse
• Burnt smell or visible scorching on the transformer
• Intermittent operation or weak contactor pull-in

Shipping & Returns

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