Resideo C7189U1005 Indoor Sensor

The Resideo C7189U1005 Remote Indoor Sensor is a critical component for achieving precise climate control when a thermostat is mounted in a suboptimal location, such as near a drafty entrance or in direct sunlight. This wall-mounted 10k ohm NTC sensor is engineered as a direct replacement for the 41-25090-27 and integrates seamlessly with VisionPRO and VisionPRO IAQ series thermostats. By providing accurate temperature readings from up to 200 feet away using standard 18/2 thermostat wire, it ensures the HVAC system responds to the actual conditions of the occupied space rather than the hallway where the main control may be located.

For large-scale or multi-room applications, multiple honeywell home remote sensors can be wired in series-parallel configurations to provide temperature averaging, delivering a balanced thermal profile across the zone. The unit is factory-calibrated with an accuracy of +/- 1.5°F at 70°F, eliminating the need for complex field adjustments. Its compact, Premier White housing is designed to blend into any professional or residential interior. When using the C7189U1005, the internal thermostat sensor is typically disabled, allowing the remote data to drive the heating and cooling cycles via the S1 and S2 terminals.

Key Benefits

• System Accuracy: Relocates temperature sensing to the "living zone," correcting for short-cycling caused by poor thermostat placement.
• Averaging Capabilities: Supports multiple-sensor networks to eliminate hot or cold spots in large open-plan offices or residential suites.
• Simplified Installation: Simple two-wire lead connection with included mounting hardware for rapid deployment.
• Universal Modern Finish: The neutral Premier White color and small footprint ensure the device remains unobtrusive on finished walls.
• Wide Compatibility: Specifically optimized for TH8000 Series and VisionPRO IAQ controls to maintain high-integrity resistance signals.

Common Questions

How many sensors can be used for temperature averaging?
Standard configurations often use four sensors (two in series, then those pairs in parallel) to maintain the required 10k ohm resistance for the thermostat logic.

Can this be used as an outdoor sensor?
No, this model is designed strictly for indoor applications with an operating range of 45°F to 88°F. For outdoor sensing, use the C7089U series.

What wire size is recommended for the 200-foot run?
Standard 18AWG thermostat wire is sufficient for most runs; however, keep wiring at least one foot away from high-voltage lines to prevent electromagnetic interference.

Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.