ICP 40VA Transformer for X9MPD075F12B2 — 115V to 24V | Ships Today

Overview

This genuine OEM 40VA control transformer (part number 1012722) powers the 24-volt control circuit on the ICP / Heil / Tempstar X9MPD075F12B2 gas furnace. It steps the incoming 115V line voltage down to 24V to drive the thermostat, control board, gas valve, and relays. When a transformer fails — usually from a shorted secondary, an overloaded control circuit, or age — the furnace goes completely dead: no thermostat response, no blower, and no ignition sequence. A correct 40VA replacement restores full low-voltage control power.

Specifications

Compatibility

Built for the ICP/Heil/Tempstar X9MPD075F12B2 gas furnace and other ICP-family furnaces and air handlers that use a 115V-to-24V 40VA control transformer. Verify your primary voltage tap and VA rating 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-compartment service panel.
3. Document — Photograph all primary and secondary wire connections before disconnecting.
4. Remove — Label and disconnect the wiring, remove the mounting screws, and lift out the failed transformer.
5. Install — Mount the new 40VA transformer, reconnect the 115V primary and 24V secondary leads exactly per your photo.
6. Test — Restore power, confirm 24V at the secondary with a meter, and verify the thermostat and ignition sequence operate.

Signs You Need a Replacement

• Furnace completely unresponsive — no blower, no ignition, dead thermostat
• No 24V reading across the transformer secondary terminals
• Burnt smell, discoloration, or melted housing on the transformer
• Repeated control-fuse blowing tied to the low-voltage circuit

Shipping & Returns

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