Tempstar Transformer for TDE075B12A1 — 115V to 24V 40VA | Ships Today
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Overview
This is a genuine OEM control transformer (part number 1011626) for the Tempstar TDE075B12A1 gas furnace. It steps the incoming 115V line voltage down to the 24V low-voltage control circuit that powers the thermostat, gas valve, ignition control, and relays. Rated at 40VA, it supplies enough current to drive the full control load of the furnace. When a control transformer fails, the furnace goes completely dead at the thermostat — no display, no call for heat, and no 24V at the control board. A buzzing transformer, a tripped low-voltage fuse on the board, or a melted/scorched winding are all classic signs of a failed or shorted transformer.
Specifications
| Spec | Value |
|---|---|
| Part Number | 1011626 |
| Type | Step-Down Control Transformer |
| Brand | Tempstar (ICP / Heil) |
| Primary Voltage | 115V |
| Secondary Voltage | 24V |
| Rating | 40VA |
| Fitment | OEM Replacement |
Compatibility
Engineered as a direct OEM replacement for the Tempstar TDE075B12A1 furnace and other ICP-family models (Tempstar, Heil, Comfortmaker, Arcoaire) that use the 1011626 transformer. Always confirm your primary voltage (115V) and VA rating (40VA) 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 and secondary wire connections before disconnecting.
- Remove — Disconnect the line-voltage primary leads and 24V secondary leads, then unbolt the transformer from its mounting bracket.
- Install — Mount the new transformer, reconnect the 115V primary and 24V secondary leads exactly per your photo.
- Test — Restore power and confirm 24V across the secondary, then verify the furnace responds to a thermostat call for heat.
Signs You Need a Replacement
- No power at the thermostat and no 24V output at the control board.
- Repeatedly blown low-voltage fuse on the control board.
- Audible buzzing or humming from the transformer.
- Visible scorching, melted insulation, or a burnt smell at the windings.
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