Tempstar 40VA Transformer for TNE075F14A1 — 115V to 24V | Ships Today

Overview

This OEM control transformer, part number 1011626, steps 115V line voltage down to the 24V control voltage that powers the thermostat, gas valve, relays, and control board in your Tempstar TNE075F14A1 furnace. Rated at 40VA, it supplies ample current for the entire low-voltage control circuit. When a transformer fails — often from a shorted secondary, a tripped internal fuse, or burned windings — the furnace goes completely dead at the controls: no thermostat response, no call for heat, and no 24V at the board. Replacing it restores power to the full low-voltage system.

Specifications

Compatibility

A direct OEM fit for the Tempstar TNE075F14A1 furnace and widely shared across ICP-family equipment including Heil, Comfortmaker, and other Tempstar models that use the 1011626 40VA transformer.

Installation Guide

1. Safety First — Disconnect power at the furnace switch and breaker; verify zero voltage with a multimeter.
2. Access — Remove the control-compartment service panel.
3. Document — Photograph all primary and secondary wire connections before disconnecting.
4. Remove — Disconnect the line-voltage and 24V leads, then unbolt the transformer from its mounting bracket.
5. Install — Mount the new transformer and reconnect the primary and secondary leads exactly per your photo.
6. Test — Restore power and confirm 24V across the secondary terminals and normal thermostat operation.

Signs You Need a Replacement

• Furnace is completely unresponsive with no thermostat display or call for heat.
• No 24V measured across the transformer secondary.
• Burnt smell or discolored, melted transformer housing.
• Repeated low-voltage fuse failures on the control board.

Shipping & Returns

Ships same day before 3 PM CST. 30-day returns. Backed by the National HVAC Parts fitment guarantee.