Tempstar 40VA Transformer for TCA960GKA200 — 208/230V to 24V | Ships Today
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Overview
This OEM control transformer (part number 1170676) supplies the 24-volt control power for the Tempstar TCA960GKA200. It steps the incoming 208/230V line voltage down to 24V and delivers up to 40VA — enough to energize the contactor coil, control board, and low-voltage circuit. The transformer is the heart of the control circuit: without it, the thermostat and contactor have no power and the unit will not respond to a call for cooling. A burned-out or shorted transformer typically results from a control-side short or a stuck contactor drawing excessive current. Symptoms include a completely dead control circuit, a tripped low-voltage fuse, or a faint burnt smell from the control box. Replacing it restores stable 24V power across the system.
Specifications
| Spec | Value |
|---|---|
| Part Number | 1170676 |
| Type | Step-Down Control Transformer |
| Brand | Tempstar (ICP / Heil) |
| Primary Voltage | 208/230V |
| Secondary Voltage | 24V |
| Rating | 40VA |
| Fits Model | TCA960GKA200 |
Compatibility
A direct-fit OEM replacement for the Tempstar TCA960GKA200. The 1170676 transformer is used across equivalent ICP-family equipment — Tempstar, Heil, Comfortmaker, Arcoaire, and ICP — running a 208/230V primary and 24V/40VA secondary. Confirm the primary/secondary voltages and VA rating against your existing transformer before ordering.
Installation Guide
- Safety First — Disconnect power at the disconnect and breaker, then verify zero voltage with a multimeter.
- Access — Remove the service panel to expose the control box.
- Document — Photograph the primary and secondary wire connections before disconnecting.
- Remove — Disconnect the primary (line) and secondary (24V) leads, then unbolt the transformer from the mounting bracket.
- Install — Mount the new transformer, matching the primary tap to your incoming voltage, and reconnect the secondary leads per your photo.
- Test — Restore power and confirm 24V across the secondary terminals with a multimeter.
Signs You Need a Replacement
- No 24V at the thermostat or contactor coil.
- Repeatedly blown low-voltage fuse.
- Burnt smell or discoloration on the transformer housing.
- Control circuit completely dead with line voltage present.
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