ICP Transformer for WAPM604A1 — 40VA 208/230V to 24V | Ships Today
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Overview
This OEM transformer (part number 1172028) supplies the low-voltage 24V control power for your ICP / Tempstar / Heil WAPM604A1 system. It steps a 208/230V primary line down to a 24V secondary at a 40VA rating, feeding the control board, contactor coil, thermostat circuit, and safety switches. When a control transformer fails, the entire 24V control circuit goes dead — the system will not start, the thermostat display may go blank, and no call for heating or cooling will be answered. Transformers commonly fail from a shorted secondary, an overloaded VA draw, or age-related winding breakdown.
Specifications
| Spec | Value |
|---|---|
| Part Number | 1172028 |
| Type | Control Transformer |
| Brand | ICP (Tempstar / Heil) |
| Rating | 40 VA |
| Primary Voltage | 208/230V |
| Secondary Voltage | 24V |
| Fit | OEM Direct Replacement |
Compatibility
Engineered as a direct OEM replacement for the ICP WAPM604A1 and shared across ICP, Tempstar, Heil, Comfortmaker, and Arcoaire equipment families that use the 208/230V-to-24V 40VA control transformer. Always confirm the part number on your existing transformer before ordering.
Installation Guide
- Safety First — Disconnect power at the breaker and verify zero voltage with a multimeter before touching any wiring.
- Access — Remove the unit's service panel to expose the control box.
- Document — Photograph all primary and secondary wire connections before disconnecting anything.
- Remove — Disconnect the primary (line) and secondary (24V) leads, then unbolt the failed transformer from its mounting bracket.
- Install — Mount the new transformer, reconnect the primary to the matching 208/230V tap and the secondary to the 24V circuit per your photo.
- Test — Restore power and confirm 24V across the secondary terminals and normal system startup.
Signs You Need a Replacement
- System completely dead with no response to the thermostat
- Blank thermostat display or no 24V at the control board
- Burning smell or visibly scorched transformer housing
- Repeatedly blown low-voltage fuse on the control board
Shipping & Returns
Ships same day on orders placed before 3 PM CST. 30-day hassle-free 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