Instant Re-start: Voltage-sensing technology allows the system to cycle back on immediately after a brief power interruption

ensuring peak thermal efficiency in steam heating systems

two-wire non-communicating zone sensor engineered for precise temperature monitoring in commercial and residential Zoned HVAC systems

Durable 5-foot capillary tube supports optimal bulb positioning for sensitive thermal response

To ensure reliable performance

Johnson Controls MR4PMUHV-12 Control THPU32HP7Y Instant Re-start: Voltage-sensing technology allowsThe Johnson Controls MR4PMUHV 12 is a professional grade, multi function refrigeration defrost control designed for precise temperature management in commercial walk in coolers and freezers. As a primary digital defrost timer replacement, this unit integrates four critical functions into a single HVACR control module: a high accuracy thermostat, a defrost cycle timer, a digital readout, and a defrost termination switch. It supports both electric heat