Tempstar 40VA Transformer for T8MPL075F16A1 — 115V to 24V Control | Ships Today
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Overview
This is the genuine OEM 40VA control transformer (part number 1012722) for the Tempstar T8MPL075F16A1 gas furnace. It converts the 115-volt incoming line voltage to the 24-volt control voltage that drives the thermostat, ignition control board, gas valve, and safety circuits. If this transformer fails, the entire low-voltage control system goes dead and the furnace will not respond to a heat call. Typical failure signs are a blank or unpowered thermostat, a control board with no indicator lights, a recurring blown low-voltage fuse, or a transformer that buzzes loudly or smells burnt. A scorched or overheating transformer should be replaced right away.
Specifications
| Spec | Value |
|---|---|
| Part Number | 1012722 |
| Type | Control Transformer |
| Brand | Tempstar (ICP / Heil) |
| Rating | 40 VA |
| Primary Voltage | 115V |
| Secondary Voltage | 24V |
| Fit | OEM Replacement |
Compatibility
Designed as the factory replacement for the Tempstar T8MPL075F16A1 furnace and interchangeable across ICP-built Tempstar, Heil, and Comfortmaker gas furnaces using a 40VA, 115V-to-24V control transformer. Confirm your existing unit is 40VA with a 115V primary and 24V secondary before ordering.
Installation Guide
- Safety First — Disconnect power at the furnace switch and breaker, then verify zero voltage with a multimeter at the line terminals.
- Access — Remove the furnace control/blower compartment service panel.
- Document — Photograph all primary (line) and secondary (24V) connections before disconnecting.
- Remove — Disconnect the primary and secondary leads and unbolt the transformer from its bracket or junction box.
- Install — Mount the new transformer and reconnect the 115V primary and 24V secondary leads exactly per your photo.
- Test — Restore power, confirm 24V across the secondary with a meter, and run a full heat cycle.
Signs You Need a Replacement
- Dead control board and blank thermostat.
- Low-voltage fuse blows repeatedly.
- No 24V output measured at the secondary terminals.
- Buzzing, overheating, or burnt smell at 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