Tempstar 40VA Transformer for TCA724GKA200 — 208/230V to 24V | Ships Today
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Overview
This OEM control transformer (part number 1170676) steps the incoming 208/230V line voltage down to 24V to power the low-voltage control circuit on your Tempstar TCA724GKA200 condensing unit. Rated at 40VA, it supplies the contactor coil, thermostat, and safety switches. When a transformer fails, the entire control circuit goes dead — the unit will not respond to a thermostat call, the contactor will not pull in, and the compressor and condenser fan stay off even though line power is present. A blown internal fuse link, a shorted secondary, or an overheated winding are the most common failure modes.
Specifications
| Spec | Value |
|---|---|
| Part Number | 1170676 |
| Type | Control / Step-Down Transformer |
| Brand | Tempstar |
| Primary Voltage | 208/230V |
| Secondary Voltage | 24V |
| Rating | 40VA |
| Fit | OEM |
Compatibility
Designed as the factory transformer for the Tempstar TCA724GKA200 condensing unit. The same 208/230V-to-24V 40VA transformer is shared across many ICP-family air conditioners and heat pumps sold under the Tempstar, Heil, Comfortmaker, and Carrier/Bryant ICP-build labels. Always confirm the part number against your existing component before ordering.
Installation Guide
- Safety First — Disconnect power at the disconnect and breaker, then verify zero voltage with a multimeter.
- Access — Remove the unit's control-box service panel.
- Document — Photograph all primary and secondary wire connections before disconnecting.
- Remove — Label and disconnect the primary (line) and secondary (24V) leads, then unbolt the old transformer from its mounting bracket.
- Install — Mount the new transformer, reconnect primary and secondary leads exactly per your photo, matching the 208/230V tap.
- Test — Restore power and confirm 24V at the secondary and that the contactor pulls in on a thermostat call.
Signs You Need a Replacement
- No 24V at the secondary terminals while line power is present.
- Contactor never energizes and the unit ignores the thermostat.
- Repeatedly blown control fuse or tripped low-voltage circuit.
- Visible scorching, swelling, or a burnt-electrical smell at the transformer.
Shipping & Returns
Ships same day before 3 PM CST. 30-day 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