Tempstar Transformer for TNE050B12B1 — 40VA 115V to 24V | Ships Today
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Overview
This OEM Tempstar control transformer (part number 1011626) steps 115V line voltage down to 24V to power the low-voltage control circuit of your TNE050B12B1 furnace. Rated at 40VA, it supplies the thermostat, gas valve, ignition control, relays, and contactor coils that run your heating system. When a transformer fails, the entire 24V control side goes dead — your thermostat screen may go blank, the blower and igniter won't energize, and the furnace simply won't respond to a call for heat. A buzzing transformer, a blown low-voltage fuse that keeps failing, or a burnt-smelling control board are all classic signs of a transformer at the end of its life.
Specifications
| Spec | Value |
|---|---|
| OEM Part Number | 1011626 |
| Type | Step-Down Control Transformer |
| Brand | Tempstar (ICP / Heil family) |
| Primary Voltage | 115V |
| Secondary Voltage | 24V |
| Power Rating | 40VA |
| Fitment | OEM Direct Replacement |
Compatibility
Engineered as a direct-fit replacement for the Tempstar TNE050B12B1 furnace. This 115V-to-24V 40VA transformer is also used across many ICP, Heil, Comfortmaker, and related furnace platforms. Always verify your existing transformer's VA rating and voltage match before installing.
Installation Guide
- Safety First — Disconnect power at the furnace switch and breaker, then verify zero voltage with a multimeter.
- Access — Remove the furnace control/blower compartment service panel.
- Document — Photograph all primary (line) and secondary (24V) wire connections before disconnecting.
- Remove — Disconnect the four transformer leads, then unbolt the transformer from its mounting bracket or control panel.
- Install — Mount the new transformer, reconnect primary and secondary leads exactly per your photo.
- Test — Restore power and confirm 24V across the secondary terminals, then verify a normal heat cycle.
Signs You Need a Replacement
- Thermostat is blank or unresponsive with no 24V control power
- Repeatedly blown low-voltage control fuse
- Audible buzzing or humming from the transformer
- Burnt smell or visible scorching on the transformer body
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