Zonefirst TTS 7 Day Program Heat/Cool Stat Touch Screen Freon This F135-40F thermostatic switch is

This F135-40F thermostatic switch is designed to regulate blower fan cycling by monitoring heat exchanger temperatures

What does a flashing flame light on the module indicate

check the back of the switch

Universal Input: The 10-30V AC/DC operating range supports both AC and DC control circuits without additional hardware

An integrated manual override crank and enclosed screw terminal strip simplify maintenance and wiring troubleshooting for technicians

Zonefirst TTS 7 Day Program Heat/Cool Stat Touch Screen Freon This F135-40F thermostatic switch isThe Zonefirst TTS is a professional grade 7 day programmable thermostat engineered for precise climate management in residential and light commercial zoning applications. This touchscreen HVAC control features a high contrast backlit interface that simplifies setpoint adjustments and schedule overrides, making it a preferred choice for contractors seeking a Zonefirst digital stat with high reliability. Designed for compatibility with most 24V AC