Use the or Down arrow keys to adjust the hour. Ensure the AM/PM indicator is correct. Press the Clock button again. The minute digits will flash. Use the arrow keys to adjust the minutes.
Check behind the thermostat to see if the hole where the wire bundle enters the wall is sealed. Unsealed holes draw cold or hot air from inside the wall cavity directly over the temperature sensor. If the sensor is clean and sealed but still incorrect, enter the Installer Setup to adjust the temperature calibration offset. Thermostat Says "Cool On" but No Cold Air is Blowing
: Built for ReliaTel-controlled units ranging from 3 to 10 tons.
: Simplified communication wiring to the main HVAC unit. Installation and Wiring
This indicates the main HVAC unit controller has detected a diagnostic fault. trane baysens019c manual
One of the main reasons people search for the is because their unit is acting up. Here are three common issues and what the manual suggests:
: Clear readout of time, temperature, and system status.
Always refer to the latest official Trane documentation for safety, proper installation, and compliance with local electrical codes.
Remove the sensor body and check if air is blowing out of the wall hole behind the subbase. Seal the hole with thermal caulk or insulation foam. Ensure no direct sunlight or appliances are heating the sensor. Diagnostics and Error Codes Use the or Down arrow keys to adjust the hour
The is a wired remote zone sensor designed for use with select Trane commercial HVAC equipment, including packaged rooftop units, heat pumps, and air handlers that support a communicating or conventional thermostat interface. This sensor plays a critical role in monitoring space temperature and enabling proper system control.
To optimize performance and efficiency, here are some tips and tricks:
Some earlier‑production units of the BAYSENS019C did not include a battery backup. If the unit has a battery holder, a CR2032 is used for clock backup only—the sensor draws its primary operating power from the 24 VAC supply lines.
is a non-programmable, wall-mounted sensor. Its primary job is to provide a 10k ohm resistance signal back to the unit Sensor Type: 10 kΩ, Type II thermistor. Temperature Range: 32°F to 122°F (0°C to 50°C). Fits a standard 2" x 4" vertical junction box. UV-protected Polycarbonate/ABS blend. Wiring and Installation BAYSENS019C The minute digits will flash
BAYSENS019C (also identified as ASYSTAT666C ) is a programmable 7-day zone sensor designed for use with commercial HVAC systems, such as Voyager and Precedent units. Core Features and Specifications
: If the displayed temperature seems inaccurate, some Trane models allow for an Indoor Calibration offset via the advanced settings menu. Unlocking the Display
Your specific (e.g., Precedent, Voyager).
Behind doors or in corners where air cannot circulate freely.