Johnson Controls T-4000-3139 Horizontal Thermostat Blank Cover White

The Johnson Controls T-4000-3139 is a horizontal thermostat blank cover designed to provide a clean, finished appearance when covering unused thermostat openings or during thermostat replacement projects. This white plastic cover plate ensures a professional look while protecting the wall surface.

Key Features:

• Horizontal orientation design for standard thermostat wall openings
• Durable white plastic construction with aluminum backing for stability
• Provides clean coverage for unused thermostat locations
• Easy installation over existing wall openings
• Compatible with Johnson Controls thermostat mounting systems

This blank cover is ideal for HVAC contractors, building maintenance professionals, and property managers who need to cover thermostat openings during renovations, system upgrades, or when decommissioning climate control zones. The neutral white finish blends seamlessly with most interior wall colors.