replacing the VR20 circuit board is the standard corrective action

Key Benefits for the Contractor Direct Swap Compatibility: Engineered as the factory-authorized replacement for the ZF18K4E-TF5-931

Facilitates in-situ valve retrofitting

When integrating this electrode probe holder into your system

or position-indication lights in economizer circuits

Mitsubishi Electric E22C34307 Thermistor 320734-701 replacing the VR20 circuit boardThe Mitsubishi Electric E22C34307 Thermistor is a critical OEM replacement heat exchanger temperature sensor designed for precision monitoring in Mitsubishi ductless mini split systems and multi zone heat pumps. As a genuine HVAC temperature sensor, this component provides real time resistance feedback to the main control board, ensuring the system maintains optimal refrigerant cycles and prevents freeze ups or overheating of the coil. When