Tempstar Transformer for TCH924GKA100 — 40VA 208/230V to 24V | Ships Today
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Overview
This genuine OEM 40VA control transformer (part number 1170676) steps line voltage of 208/230V down to the 24V control voltage that powers the Tempstar TCH924GKA100 heat pump's contactor, reversing valve coil, and low-voltage controls. The transformer is the heart of the 24V control circuit — without it, the thermostat cannot energize the contactor and the system will not run. This listing covers the transformer along with the matching reversing-valve coil (1172574) and reversing valve assembly with coil (1175621) used in the same control circuit, so you can restore full heat-pump operation in one service call. When a transformer fails from overload or a shorted secondary, you get no cooling, no heating, and a dead thermostat display.
Specifications
| Spec | Value |
|---|---|
| Part Numbers | 1170676, 1172574, 1175621 |
| Type | Step-Down Control Transformer |
| Brand | Tempstar (ICP / Heil) |
| Rating | 40 VA |
| Primary Voltage | 208 / 230 VAC |
| Secondary Voltage | 24 VAC |
| Fits Model | TCH924GKA100 |
Compatibility
Built as the factory replacement for the Tempstar TCH924GKA100 heat pump. This 40VA, 208/230-to-24V transformer is a common service part across ICP-family heat pumps and air conditioners sold under the Heil, Comfortmaker, and Tempstar brands. Confirm your primary voltage and the 40VA rating before installing.
Installation Guide
- Safety First — Disconnect power at the disconnect and breaker. Verify zero voltage with a multimeter on both the line and 24V sides.
- Access — Remove the control-panel service cover to reach the transformer and low-voltage terminal block.
- Document — Photograph the primary and secondary wiring before disconnecting.
- Remove — Disconnect the primary and 24V leads and unbolt the transformer from the panel.
- Install — Mount the new transformer, matching the primary taps to your line voltage, and reconnect the secondary per your photo.
- Test — Restore power and confirm 24V across the secondary and proper contactor pull-in.
Signs You Need a Replacement
- No 24V output measured at the secondary terminals.
- Thermostat is blank and the contactor never engages.
- Repeated blown low-voltage fuses or a burnt-smelling transformer.
- System runs intermittently or drops out under load.
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