ICP Step-Down Transformer 40VA 115V to 24V for X8MPN075B12A1 — OEM 1012722 | Ships Today
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Overview
This is a genuine OEM 40VA step-down control transformer (part number 1012722) for the ICP/Tempstar/Heil X8MPN075B12A1 gas furnace. The transformer reduces the incoming 115V line voltage to the 24V low-voltage control circuit that powers the thermostat, gas valve, igniter circuit, and control board. Rated at 40VA, it supplies enough current for the full low-voltage load of a modern furnace. When a transformer fails, the entire control system goes dead: the thermostat screen may go blank, the furnace will not respond to a heat call, and the unit will appear completely unresponsive even though line power is present. A buzzing transformer, a blown low-voltage fuse on the control board, or a burnt smell near the control area are all classic signs of transformer failure.
Specifications
| Spec | Value |
|---|---|
| Part Number | 1012722 |
| Type | Step-Down Control Transformer |
| Brand | ICP / Tempstar / Heil |
| Primary Voltage | 115V |
| Secondary Voltage | 24V |
| Rating | 40VA |
| Fits Model | X8MPN075B12A1 |
Compatibility
Designed as the factory replacement transformer for the ICP/Tempstar/Heil X8MPN075B12A1 furnace. The 115V-to-24V, 40VA configuration is also common across many ICP-family furnaces — verify your existing transformer is rated 115V primary / 24V secondary / 40VA before ordering.
Installation Guide
- Safety First — Disconnect power at the furnace switch and breaker, then verify zero voltage with a multimeter.
- Access — Remove the furnace control/blower compartment service panel.
- Document — Photograph all primary and secondary wire connections before disconnecting.
- Remove — Disconnect the 115V primary leads and the 24V secondary leads, then unbolt the transformer from its mounting bracket.
- Install — Mount the new transformer, reconnect primary and secondary leads exactly per your photo, and confirm tight terminals.
- Test — Restore power and verify 24V across the secondary terminals and a normal heat-call response.
Signs You Need a Replacement
- Furnace completely unresponsive with no thermostat power
- Blank thermostat display despite good batteries/line power
- Repeatedly blown low-voltage control fuse
- Audible buzzing or a burnt smell from the transformer
Shipping & Returns
Ships same day before 3 PM CST. 30-day returns. Backed by the National HVAC Parts fitment guarantee.
Shipping Information
- Orders placed before 3PM CST ship same business day
- Standard delivery: 2-5 business days
- Express shipping available at checkout
- Free shipping on orders over $75
- Tracking number emailed upon shipment
Return Policy
- 30-day returns on unused parts in original packaging
- Electrical parts (capacitors, contactors, control boards) are final sale once installed
- Email info@nationalhvacparts.com to initiate a return
- Refunds processed within 5-7 business days