Tempstar 40VA Transformer for TCH636GKA200 — 208/230V to 24V Control | Ships Today
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Overview
This OEM control transformer (part number 1170676) supplies the 24-volt power that runs the entire low-voltage control system in your Tempstar TCH636GKA200. It steps 208/230V line voltage down to 24V at 40VA, feeding the thermostat, contactor coil, relays, and safety switches. The transformer is the heart of the control circuit — when it fails, the unit goes completely dead on the control side: no thermostat response, no contactor pull-in, and no cooling or heating call. Failures usually come from a shorted control wire, an overloaded coil, or simply age. This 40VA OEM transformer delivers the exact voltage and capacity the TCH636GKA200 was engineered for, restoring full control power without overloading.
Specifications
| Spec | Value |
|---|---|
| Part Number | 1170676 |
| Type | Step-Down Control Transformer |
| Brand | Tempstar (ICP / Heil) |
| Primary Voltage | 208/230V |
| Secondary Voltage | 24V |
| Rating | 40 VA |
| Application | Furnace / Air Handler / Condensing Unit Control |
Compatibility
Factory replacement 40VA transformer for the Tempstar TCH636GKA200. The 1170676 part is common across ICP-family equipment sold under Tempstar, Heil, Comfortmaker, and Arcoaire that uses a 208/230V-to-24V 40VA control transformer. Confirm your primary supply is 208/230V and that 40VA meets your control load before installing.
Installation Guide
- Safety First — Disconnect power at the disconnect and breaker, then verify zero voltage with a multimeter before touching the primary leads.
- Access — Remove the control/electrical access panel to reach the transformer mounting.
- Document — Photograph the primary (line) and secondary (24V) wire connections before disconnecting.
- Remove — Label and disconnect the primary and secondary leads, then unbolt the transformer from its bracket.
- Install — Mount the new transformer, connect the 208/230V leads to the primary and the 24V leads to the secondary exactly per your photo.
- Test — Restore power and confirm 24V across the secondary, then verify the thermostat and contactor respond on a call.
Signs You Need a Replacement
- Completely dead control side — blank thermostat, no response to a call
- No measurable 24V at the transformer secondary
- Burned smell, discolored housing, or melted potting on the old unit
- Repeated control fuse blowing or contactor that won't pull in
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