ICP 40VA Transformer for VNK075F14B1 — 115V to 24V Control Transformer | Ships Today

Overview

This OEM control transformer (part number 1011626, TRANS 115>24 40VA S) steps down 115-volt line power to the 24-volt control voltage your ICP Tempstar Heil VNK075F14B1 furnace needs to operate the thermostat, gas valve, control board, and relays. Rated at 40VA, it supplies enough current to drive the full low-voltage control circuit. When a transformer fails — usually from a shorted control wire, a stuck contactor, or simple age — the entire 24V system goes dead: the thermostat screen blanks, the furnace will not respond to a call for heat, and nothing energizes even though line power is present. A buzzing, scorched, or hot-to-the-touch transformer is a classic sign of impending failure or an upstream short that should be corrected before installing the replacement.

Specifications

Compatibility

Direct OEM replacement for the ICP Tempstar Heil VNK075F14B1 furnace. The 115V-to-24V 40VA transformer is a common control component shared across many ICP-family gas furnaces (Tempstar, Heil, Comfortmaker). Confirm your primary voltage and VA rating before ordering.

Installation Guide

1. Safety First — Disconnect power at the furnace switch and breaker. Verify zero voltage with a multimeter before proceeding.
2. Access — Remove the furnace control-compartment service panel.
3. Document — Photograph all primary (line) and secondary (24V) wire connections before disconnecting.
4. Remove — Disconnect the leads, remove the transformer mounting screw(s), and take out the old transformer.
5. Install — Mount the new transformer, then reconnect the primary and secondary leads exactly per your photo.
6. Test — Restore power and confirm 24V across the secondary terminals and normal furnace operation on a call for heat.

Signs You Need a Replacement

• Thermostat is blank and the furnace is completely unresponsive.
• No 24V measured at the secondary terminals with line power present.
• Transformer is buzzing, hot, or has a burnt smell.
• Repeated blown fuses on the control board after a short.

Shipping & Returns

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