Lennox 27P25 HVAC Control Transformer 208/240V to 24V 70VA

The Lennox 27P25 is a genuine OEM control transformer designed for Lennox heating and air conditioning systems. This transformer steps down high-voltage power from 208/240 volts primary to a safe 24 volts secondary, providing the proper voltage for thermostats and control circuits.

Key Specifications:

• Primary Voltage: 208/240V AC
• Secondary Voltage: 24V AC
• Power Rating: 70 VA
• Frequency: 60 Hz
• OEM Part Number: 51M4401
• Genuine Lennox replacement part

This transformer is essential for proper operation of your HVAC system's control circuits. It reduces utility voltage to a manageable level that safely powers thermostats, relays, and other low-voltage control components. Transformers are not universal parts due to varying voltage and VA ratings, so using the correct OEM replacement ensures reliable performance and system compatibility.

Common Signs of Transformer Failure: Thermostat not responding, HVAC system not turning on, or unusual buzzing or humming sounds from the unit. When a transformer fails, control devices will not receive proper voltage and the system becomes non-operational.