ICP Transformer for WAHT244A1 — 40VA 208/230V to 24V | Ships Today

Overview

This OEM 40VA control transformer (part number 1172028) is the low-voltage power source for your ICP/Tempstar/Heil WAHT244A1 air handler. It steps the 208/230V line voltage down to the 24V control voltage that powers the thermostat, control board, relays, and contactor coil. When a transformer fails — usually from a shorted control wire, a stuck contactor, or simple age — the entire 24V control circuit goes dead. The result is a system that will not respond to the thermostat at all: no blower, no call for cool or heat, and a blank or unpowered thermostat. A clicking or buzzing transformer, a blown low-voltage fuse that keeps failing, or 0 volts across the secondary terminals are all classic signs this part needs replacement.

Specifications

Compatibility

Direct OEM fit for the ICP WAHT244A1 air handler and other ICP-family equipment (Tempstar, Heil, Comfortmaker, Arcoaire) that uses the 1172028 40VA transformer. Always confirm your existing transformer is rated 208/230V primary / 24V secondary at 40VA before ordering.

Installation Guide

1. Safety First — Disconnect power at the breaker and verify zero voltage with a multimeter at both line and secondary terminals.
2. Access — Remove the air handler's electrical/service panel to expose the control area.
3. Document — Photograph all primary (line) and secondary (24V) wire connections before disconnecting.
4. Remove — Disconnect the primary and secondary leads, then unbolt the failed transformer from the mounting bracket.
5. Install — Mount the new 1172028 transformer, match the primary taps to your supply voltage, and reconnect every wire exactly per your photo.
6. Test — Restore power and confirm 24V across the secondary terminals, then verify the thermostat and blower respond.

Signs You Need a Replacement

• Thermostat is blank or unresponsive (no 24V power)
• System will not start on any call for heat or cool
• Low-voltage fuse blows repeatedly or transformer is hot/buzzing
• 0 volts measured across the 24V secondary terminals

Shipping & Returns

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