Tempstar Transformer for TCK100J16B1 — 40VA 115V to 24V | Ships Today

Overview

This OEM control transformer (part #1011626) converts 115V line voltage to the 24V control voltage that operates your Tempstar TCK100J16B1 furnace. Rated at 40VA, it supplies the thermostat, gas valve, control board, and relays through every heating cycle. A failed transformer kills the entire low-voltage circuit: the thermostat goes blank, the igniter and blower never energize, and the furnace ignores any call for heat. Telltale symptoms include a humming transformer, a 3-amp control fuse that blows repeatedly, or a scorched, discolored transformer housing from an internal short or overload.

Specifications

Compatibility

Direct-fit replacement for the Tempstar TCK100J16B1 gas furnace. This 40VA 115-to-24V transformer is shared across many ICP-family units (Heil, Comfortmaker, Tempstar) on the same control platform. Verify your existing transformer's VA rating and voltage taps before installing.

Installation Guide

1. Safety First — Disconnect power at the furnace switch and breaker, then verify zero voltage with a multimeter.
2. Access — Remove the furnace control/blower service panel.
3. Document — Photograph the primary and secondary wiring before disconnecting.
4. Remove — Disconnect the line-voltage primary and 24V secondary leads, then unbolt the transformer from its bracket.
5. Install — Mount the new transformer and reconnect primary and secondary leads per your photo, using the correct voltage tap.
6. Test — Restore power, confirm 24V across the secondary, and verify a normal heating cycle.

Signs You Need a Replacement

• Blank thermostat and a completely unresponsive furnace.
• Control fuse blows again shortly after replacement.
• Buzzing or humming from the transformer.
• No 24V at the secondary terminals with line power present.

Shipping & Returns

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