ICP 40VA Transformer for VNK075F14A1 — 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 required by your ICP Tempstar Heil VNK075F14A1 furnace, powering the thermostat, gas valve, control board, and relays. Its 40VA rating delivers enough current for the complete low-voltage control circuit. When the transformer fails — typically from a shorted control wire, a stuck load, or age — the whole 24V system goes dead: the thermostat blanks, the furnace ignores calls for heat, and nothing energizes despite line power being present. Buzzing, scorching, or a transformer that runs hot signals failure or an upstream short that must be corrected before fitting the replacement.

Specifications

Compatibility

Direct OEM replacement for the ICP Tempstar Heil VNK075F14A1 furnace. The 115V-to-24V 40VA transformer is a common control component 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 and reconnect the primary and secondary leads exactly per your photo.
6. Test — Restore power, confirm 24V across the secondary terminals, and verify normal 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 control-board fuses after a short.

Shipping & Returns

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