ICP Control Transformer for ZAEB010CSA1 — 24V 40VA OEM | Ships Today

Overview

This OEM 24-volt control transformer (part number 1053004) powers the low-voltage control circuit of your ICP ZAEB010CSA1 package unit. It converts incoming line voltage to a stable 24V that drives the thermostat, contactor coil, relays, and safety controls. Rated at 40VA, it supplies enough capacity to run multiple control devices at once without overheating. When the transformer fails, the low-voltage system goes completely dead — the thermostat screen blanks out, the contactor won't pull in, and the unit makes no heat or cool even with line voltage present. Buzzing, a repeatedly blown control fuse, or a scorched and discolored case are clear signs the original transformer has shorted and needs replacing.

Specifications

Compatibility

Direct factory replacement for the ICP/Tempstar/Heil ZAEB010CSA1 package system. Verify the secondary voltage and VA rating against your unit's wiring diagram before installation.

Installation Guide

1. Safety First — Disconnect power at the breaker and unit disconnect, then verify zero voltage with a multimeter.
2. Access — Remove the control-panel service cover.
3. Document — Photograph all primary and secondary wire connections before disconnecting.
4. Remove — Label and disconnect the leads, then unbolt the failed transformer from its bracket.
5. Install — Mount the new transformer, matching primary taps to your supply voltage, and reconnect each lead per your photo.
6. Test — Restore power and confirm a steady 24V reading across the secondary terminals.

Signs You Need a Replacement

• Blank thermostat or no response to a heating/cooling call
• Contactor and relays fail to energize despite line power
• Repeatedly blown low-voltage control fuse
• Burnt smell, buzzing, or discolored transformer housing

Shipping & Returns

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