Tempstar Transformer for TCK050F12A1 — 40VA 115/24V | Ships Today
OEM Guaranteed
Same-Day Ship
30-Day Returns
Secure Checkout
Overview
This is the genuine OEM control transformer (part number 1011626, "TRANS 115>24 40VA") for the Tempstar TCK050F12A1 gas furnace. The transformer steps line voltage (115V) down to the 24V control voltage that powers the thermostat, gas valve, igniter circuit, and control board relays. Rated at 40VA, it supplies enough current to drive the entire low-voltage control circuit. When a transformer fails, the furnace goes completely dead on the control side — the thermostat screen may go blank, the blower and burners never start, and you will often find a blown low-voltage fuse on the control board. A transformer that hums loudly, runs hot, or shows no 24V output between the R and C terminals has failed internally and must be replaced.
Specifications
| Spec | Value |
|---|---|
| OEM Part Number | 1011626 |
| Type | Control / Step-Down Transformer |
| Brand | Tempstar |
| Rating | 40 VA |
| Primary Voltage | 115V |
| Secondary Voltage | 24V |
| Fits Model | TCK050F12A1 |
Compatibility
Designed as a direct-fit OEM replacement for the Tempstar TCK050F12A1 furnace. This 40VA 115/24V transformer is also commonly used across ICP, Heil, Comfortmaker, and other family-brand furnaces that share the same control platform. Always confirm your primary voltage and VA rating against the failed unit before installing.
Installation Guide
- Safety First — Disconnect power at the furnace switch and breaker, then verify zero voltage with a multimeter before touching any wiring.
- Access — Remove the furnace control / blower compartment door to expose the control board and transformer.
- Document — Photograph the transformer wiring (primary line leads and the 24V secondary leads to the board) before disconnecting anything.
- Remove — Disconnect the primary and secondary leads, then unbolt the transformer from its mounting bracket or the control box.
- Install — Mount the new transformer, reconnect the primary (115V) and secondary (24V) leads exactly per your photo, and secure all connections.
- Test — Restore power and confirm 24V across the R and C terminals, then run a full heat cycle.
Signs You Need a Replacement
- Furnace is completely unresponsive and the thermostat is dead.
- Repeatedly blown low-voltage (3A/5A) control fuse.
- No 24V output measured between the secondary terminals.
- Transformer buzzes loudly, smells burnt, or is hot to the touch.
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