Tempstar 40VA Transformer for TCH936GKA100 — 208/230V to 24V | Ships Today
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Overview
This genuine OEM control transformer (part number 1170676) supplies the 24V control power for the Tempstar TCH936GKA100 heat pump. It is a 40VA step-down transformer that converts the 208/230V line voltage into the 24V low-voltage power used by the thermostat, contactor coil, defrost board, and safety circuits. When a transformer fails — usually from a control-circuit short, voltage surge, or age — the entire low-voltage system goes dead: no thermostat display, no call for heating or cooling, and an unresponsive contactor. Replacing it with the correct 40VA OEM transformer restores full control-circuit power.
Specifications
| Spec | Value |
|---|---|
| Part Number | 1170676 |
| Type | Step-down control transformer |
| Brand | Tempstar (ICP / Heil family) |
| Rating | 40 VA |
| Primary Voltage | 208/230V |
| Secondary Voltage | 24V |
| Fit | OEM direct replacement |
Compatibility
A direct-fit replacement for the Tempstar TCH936GKA100. The shared ICP/Tempstar/Heil/Comfortmaker platform means this 40VA 208/230V-to-24V transformer also serves numerous equivalent models across those brands. Confirm part number 1170676 and your existing primary voltage tap before ordering.
Installation Guide
- Safety First — Disconnect power at the disconnect and breaker, and verify zero voltage with a multimeter.
- Access — Remove the control/service panel to expose the transformer and wiring.
- Document — Photograph the primary and secondary wire connections and the voltage tap in use.
- Remove — Disconnect the primary and secondary leads, then unbolt the transformer from its mounting bracket.
- Install — Mount the new transformer, land the primary on the matching 208 or 230V tap, and reconnect the 24V secondary per your photo.
- Test — Restore power and confirm ~24V across the secondary and a working thermostat/contactor call.
Signs You Need a Replacement
- Dead thermostat with no 24V control power present
- System will not respond to any heating or cooling call
- Repeated blown low-voltage fuse or burnt transformer smell
- Measured 0V on the secondary with proper line voltage on the primary
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