Tempstar 40VA Transformer for TCH960GKA200 — 208/230V to 24V | Ships Today

Overview

This OEM control transformer (part number 1170676) steps 208/230V line power down to the 24V control voltage that runs the thermostat, relays, gas valve, and control board on your Tempstar TCH960GKA200. Rated at 40VA, it supplies enough current for the full low-voltage circuit including a typical accessory load. When a transformer fails — usually from a shorted thermostat wire, a stuck contactor coil, or simple age — the entire 24V system goes dead: no thermostat display, no cooling or heating call, and no contactor pull-in. Replacing it with the correct OEM 40VA unit restores reliable control power.

Specifications

Compatibility

Built for the Tempstar TCH960GKA200 and shared across ICP-platform equipment from Tempstar, Heil, Comfortmaker, and Carrier that uses a 208/230V primary, 40VA, 24V secondary transformer. Verify your primary tap voltage and VA rating before installing.

Installation Guide

1. Safety First — Disconnect power at the breaker and verify zero voltage with a multimeter on the primary leads.
2. Access — Remove the service panel to reach the control box.
3. Document — Photograph the primary tap wiring and the 24V secondary connections.
4. Remove — Disconnect the primary and secondary leads, then unbolt the transformer from the panel.
5. Install — Mount the new transformer and connect the correct primary tap (208 vs 230V) and the 24V secondary per your photo.
6. Test — Restore power and confirm 24V across the secondary and a normal call to the contactor or board.

Signs You Need a Replacement

• Completely dead thermostat with no 24V control power
• System won't respond to heating or cooling calls
• Burned smell or scorched transformer windings
• No 24V reading on the secondary with line voltage present on the primary

Shipping & Returns

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