Tempstar 40VA Transformer 208/230V to 24V for TCA760GKB101 — OEM 1170676 | Ships Today
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Overview
This genuine OEM control transformer (part number 1170676) supplies the 24-volt control power for the Tempstar TCA760GKB101 system. It steps the 208/230V line voltage down to 24V at 40VA, energizing the thermostat, contactor coil, and other low-voltage controls. When the transformer fails — usually from a shorted control circuit, a stuck contactor coil, or simple age — the entire low-voltage side goes dead: the thermostat screen may go blank, the contactor won't pull in, and the system won't respond to a cooling call even though high-voltage power is present. A burnt smell, a tripped low-voltage fuse, or 0 volts on the secondary terminals confirms the transformer needs to be replaced.
Specifications
| Spec | Value |
|---|---|
| Part Number | 1170676 |
| Type | Step-Down Control Transformer |
| Brand | Tempstar |
| Primary Voltage | 208/230V |
| Secondary Voltage | 24V |
| Rating | 40 VA |
| Fits Model | TCA760GKB101 |
Compatibility
Direct OEM replacement for the Tempstar TCA760GKB101 air conditioning system. Confirm the primary voltage taps (208/230V), 24V secondary, and 40VA rating match your original transformer before installing.
Installation Guide
- Safety First — Disconnect power at the disconnect and breaker, then verify zero voltage with a multimeter.
- Access — Remove the service panel to reach the transformer in the control compartment.
- Document — Photograph the primary (line) and secondary (24V) wiring before disconnecting.
- Remove — Label and disconnect the primary and secondary leads, then unbolt the old transformer from its mount.
- Install — Mount the new transformer, connect the correct primary tap for your supply voltage, and reconnect the 24V secondary per your photo.
- Test — Restore power and confirm 24V at the secondary and that the controls respond to a cooling call.
Signs You Need a Replacement
- Blank thermostat or completely dead low-voltage controls
- Contactor won't pull in despite line power being present
- 0 volts measured across the 24V secondary terminals
- Burnt smell or repeatedly blown low-voltage fuse
Shipping & Returns
Ships same day on orders placed before 3 PM CST. 30-day returns on unused parts. 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