ICP 40VA Transformer for VNE125J20A1 — 115V to 24V | Ships Today

Overview

This OEM control transformer (part 1011626, TRANS 115>24 40VA S) provides the 24V low-voltage power that runs your ICP Tempstar Heil VNE125J20A1 furnace. It steps 115V line voltage down to 24V at 40VA, energizing the control board, gas valve, thermostat circuit, and relays. When this transformer fails the furnace goes completely dead on a heat call — no display, no blower, no ignition — despite normal line power. Common causes are a shorted thermostat wire, a failed gas-valve coil drawing excess current, or age-related winding failure.

Specifications

Compatibility

Designed for the ICP Tempstar Heil VNE125J20A1 furnace and interchangeable across many ICP-family (Comfortmaker, Arcoaire, KeepRite) units using a 115V-to-24V 40VA control transformer. Confirm the primary tap and VA rating against your existing part before installing.

Installation Guide

1. Safety First — Disconnect power at the furnace switch and breaker. Verify zero voltage with a multimeter.
2. Access — Remove the control/blower compartment panel to reach the transformer.
3. Document — Photograph every primary and secondary lead before disconnecting.
4. Remove — Disconnect the wires, remove the mounting screws, and lift out the old transformer.
5. Install — Mount the new transformer, then reconnect 115V primary and 24V secondary leads exactly per your photo.
6. Test — Restore power and confirm 24V at the secondary and normal furnace operation on a heat call.

Signs You Need a Replacement

• Furnace is completely unresponsive despite confirmed 115V line power
• No 24V reading at the control board or thermostat terminals
• Blown low-voltage fuse that re-blows after replacement
• Burnt smell or discolored windings at the transformer

Shipping & Returns

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