ICP Transformer for WFMR070A024A1 — 40VA 120/24V Step-Down | Ships Today

Overview

This OEM 40VA control transformer (part #1176944) supplies the low-voltage 24V power that runs the thermostat, gas valve, relays, and control board in your ICP/Tempstar/Heil WFMR070A024A1 system. It steps the incoming 120V line down to 24V. When a transformer fails, the entire control circuit goes dead — the thermostat screen blanks, the furnace will not respond to a call for heat or cool, and you may smell burnt insulation or find a blown low-voltage fuse. A transformer that hums loudly or runs hot is also on its way out.

Specifications

Compatibility

Direct OEM fit for the ICP/Tempstar/Heil WFMR070A024A1 furnace. The 40VA 120-24V rating is common across many ICP-family models — verify your existing transformer's VA and voltage ratings match before installing.

Installation Guide

1. Safety First — Disconnect power at the breaker and verify zero voltage with a multimeter at both the line and control terminals.
2. Access — Remove the furnace service panel to expose the control compartment.
3. Document — Photograph all primary and secondary wire connections before disconnecting.
4. Remove — Disconnect the 120V primary leads and the 24V secondary leads, then unbolt the failed transformer from the mounting bracket.
5. Install — Mount the new transformer, reconnect the primary and secondary wiring exactly per your photo.
6. Test — Restore power and confirm 24V across the secondary terminals and normal system operation.

Signs You Need a Replacement

• Thermostat is completely blank with no 24V power
• Furnace will not respond to any call for heat or cool
• Repeatedly blown low-voltage control fuse
• Transformer hums loudly, runs very hot, or smells burnt

Shipping & Returns

Ships same day before 3 PM CST. 30-day returns. Backed by the National HVAC Parts fitment guarantee.