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This OEM 40VA step-down transformer (part number 1177217) supplies the low-voltage 24V control power for your ICP / Tempstar / Heil WFAR080C060B1 furnace. It converts the incoming 120V line voltage down to the 24V needed by the control board, thermostat, gas valve, and relays. A failed transformer leaves the entire control circuit dead — the thermostat goes blank and the furnace will not respond to any call for heat or fan. Transformers commonly fail from a low-voltage short, a seized gas valve drawing excess current, or simple age-related winding breakdown. Replacing it with a genuine 40VA OEM unit restores reliable control power across the system.
| Spec | Value |
|---|---|
| Part Number | 1177217 |
| Type | Step-Down Control Transformer |
| Brand | ICP / Tempstar / Heil |
| Rating | 40 VA |
| Primary Voltage | 120 V |
| Secondary Voltage | 24 V |
| Fit | OEM direct replacement |
Direct-fit replacement for the ICP Tempstar Heil WFAR080C060B1 gas furnace and other ICP-family furnaces using the 40VA 1177217 transformer. Verify the VA rating and part number on your existing transformer before ordering.
Ships same day before 3 PM CST. 30-day returns. Backed by the National HVAC Parts fitment guarantee.