Tempstar Transformer for TCA760GKA100 — 40VA 208/230V to 24V | Ships Today
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Overview
This genuine OEM control transformer (part number 1170676) supplies low-voltage power for the Tempstar TCA760GKA100. It steps the 208/230-volt line voltage down to 24 volts at 40 VA to drive the contactor coil, control board, safety switches, and thermostat circuit. The transformer is the heart of the control system — when it fails, the entire low-voltage side goes dead. Typical failure symptoms include a completely unresponsive unit, a thermostat with no power, a contactor that won't pull in, or a transformer that has overheated, buzzed, or burned open after a control-side short. A 40 VA rating provides ample capacity for the unit's control loads. Replacing it with the correct OEM 208/230-to-24V transformer restores stable control voltage and reliable operation.
Specifications
| Spec | Value |
|---|---|
| Part Number | 1170676 |
| Type | Step-Down Control Transformer |
| Brand | Tempstar (ICP/Heil) |
| Rating | 40 VA |
| Primary Voltage | 208/230 VAC |
| Secondary Voltage | 24 VAC |
| Fits Model | TCA760GKA100 |
Compatibility
Built as the factory replacement for the Tempstar TCA760GKA100 condensing unit. The identical 40VA 208/230-to-24V transformer is shared across matching ICP, Heil, and Comfortmaker condensers on this platform. Confirm VA rating, primary taps, and secondary voltage against your original part before installing.
Installation Guide
- Safety First — Disconnect power at the breaker and disconnect, then verify zero voltage with a multimeter.
- Access — Remove the service panel to reach the control compartment.
- Document — Photograph the primary and secondary lead connections before removing anything.
- Remove — Disconnect the line-voltage primary leads and 24V secondary leads, then unbolt the transformer from its bracket.
- Install — Mount the new transformer and reconnect each lead per your photo, matching the correct primary tap for your supply voltage.
- Test — Restore power and confirm 24V at the secondary and proper control operation.
Signs You Need a Replacement
- No power to the thermostat or control board.
- Contactor will not energize on a cooling call.
- Burnt smell, buzzing, or discolored transformer housing.
- No 24V reading at the secondary terminals.
Shipping & Returns
Ships same day on orders placed before 3 PM CST. 30-day hassle-free returns. Backed by the National HVAC Parts fitment guarantee.
Shipping Information
- Orders placed before 3PM CST ship same business day
- Standard delivery: 2-5 business days
- Express shipping available at checkout
- Free shipping on orders over $75
- Tracking number emailed upon shipment
Return Policy
- 30-day returns on unused parts in original packaging
- Electrical parts (capacitors, contactors, control boards) are final sale once installed
- Email info@nationalhvacparts.com to initiate a return
- Refunds processed within 5-7 business days