ICP 40VA Transformer for X8MPV075F14A3 — 115V to 24V Control | Ships Today
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Overview
This OEM 40VA control transformer (part 1012722) steps the furnace's 115 VAC line voltage down to the 24 VAC low-voltage control circuit on the ICP / Tempstar / Heil X8MPV075F14A3 two-stage gas furnace. Every low-voltage control on the system — the thermostat, two-stage gas valve, igniter circuit through the control board, and blower relays — depends on a clean, stable 24V supply from this transformer. When it fails, the furnace goes completely dead on the control side: no thermostat response, no ignition sequence, and often a blown low-voltage fuse on the board. Transformers fail from age, shorted secondary wiring, or a stuck gas valve drawing excess current that overheats the windings. Replacing a marginal or burned-out transformer restores reliable 24V control power to the entire system.
Specifications
| Spec | Value |
|---|---|
| Part Number | 1012722 (TRANS 115>24 40VA) |
| Type | Step-down control transformer |
| Brand | ICP / Tempstar / Heil |
| Primary Voltage | 115 VAC |
| Secondary Voltage | 24 VAC |
| Rating | 40 VA |
| Fits Model | X8MPV075F14A3 |
Compatibility
Direct OEM replacement transformer for the ICP/Tempstar/Heil X8MPV075F14A3 furnace control circuit. Confirm the 115V primary / 24V secondary rating and the 40 VA size, and compare the mounting bracket and terminal layout to the original before installing.
Installation Guide
- Safety First — Disconnect power at the furnace switch and breaker and verify zero voltage with a multimeter.
- Access — Remove the furnace control-compartment service panel.
- Document — Photograph the primary (line) and secondary (24V) leads and their terminal positions before disconnecting.
- Remove — Disconnect the four leads, then remove the transformer mounting screws or bracket.
- Install — Mount the new transformer, then reconnect the 115V primary and 24V secondary leads exactly per your photo.
- Test — Restore power, confirm 24 VAC across the secondary with a meter, and run a full heat cycle.
Signs You Need a Replacement
- Furnace is completely unresponsive to the thermostat (no ignition sequence).
- No 24 VAC measured at the transformer secondary.
- Repeatedly blown low-voltage control fuse on the board.
- Burnt smell or visibly scorched / swollen transformer body.
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