Trane TRR03252 24V Secondary HVAC Control Transformer OEM Replacement

The Trane TRR03252 is a genuine OEM control transformer designed to step down incoming line voltage to a 24-volt secondary output, supplying the low-voltage power required by thermostats, relays, gas valves, and other control circuit components in Trane HVAC equipment.

As a factory-original Trane part, this transformer is engineered to meet the precise electrical requirements of the systems it was designed for, ensuring reliable and code-compliant operation. Replacing a failed transformer with the correct OEM part eliminates the guesswork associated with aftermarket alternatives and ensures voltage and VA ratings are properly matched to your system's control circuit load.

Key Features:

• Genuine OEM Trane replacement transformer
• 24V secondary output for low-voltage HVAC control circuits
• Powers thermostats, relay coils, gas valves, and valve actuators
• Designed for use in Trane furnaces, air handlers, and other HVAC equipment
• UL Listed Class 2 transformer construction for safe low-voltage circuit operation
• Direct OEM replacement — matches original voltage and VA specifications

A faulty transformer is one of the most common electrical failures in HVAC service calls. When line voltage is present at the unit but the thermostat shows no power, the control transformer is typically the first component to inspect. Replacing it with the correct Trane OEM part — matched by MPN — restores proper low-voltage control power and protects connected components from voltage irregularities.