Zonefirst TTS 7 Day Program Heat/Cool Stat Touch Screen Els PW 17895 The green spring

The green spring

or the furnace control board flashing a pressure switch lockout code

This sequencer relay ensures stable terminal connections and helps maintain HVAC system efficiency by reducing the high inrush current typically associated with simultaneous multi-stage element activation

While it is often found in systems with similar nominal voltages

Zonefirst TTS 7 Day Program Heat/Cool Stat Touch Screen Els PW 17895 The green springThe 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