ICP 40VA Transformer 208/240V to 24V for PGMB038H075/H100/H125 — Ships Today

Overview

The ICP 58025 is an OEM 40VA control transformer that steps 208/240V line voltage down to 24V to power the control board, gas valve, contactor coil, and thermostat circuit on PGMB038H series package units. As the source of all low-voltage control power, a failed transformer leaves the unit completely dead — no 24V means no response to any heating or cooling call. These transformers most often fail from a shorted secondary caused by a grounded control wire, which overheats the windings until they open. Installing a properly rated 40VA OEM replacement restores stable, on-spec 24V control power.

Specifications

Compatibility

Direct OEM replacement for ICP package units PGMB038H075, PGMB038H100, and PGMB038H125. Confirm your primary voltage and VA rating before installing.

Installation Guide

1. Safety First — Disconnect power at the unit disconnect and verify zero voltage with a multimeter.
2. Access — Remove the control compartment access panel.
3. Document — Photograph all primary and secondary leads before disconnecting.
4. Remove — Disconnect the leads, remove the mounting screws, and pull the old transformer. Inspect the low-voltage wiring for shorts before energizing the new unit.
5. Install — Mount the new transformer, land the primary leads on the 208 or 240V tap to match your supply, and reconnect the 24V secondary per your photo.
6. Test — Restore power, verify 24V at the secondary with a multimeter, and confirm the controls energize.

Signs You Need a Replacement

• Package unit dead with no 24V control power
• Repeatedly blown or tripped low-voltage fuse
• Burnt smell or discolored transformer housing
• No voltage at the secondary terminals under load

Shipping & Returns

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