This model is designed to fit into a 4

or the unit failing to fire even when the system is fully bled of air

the S1-1TVM4J1 is specifically calibrated and charged for R410A systems and cannot be used with other refrigerants

check for restricted airflow

130367) for simplified maintenance without removing the entire socket assembly

Venstar VST1010 Prog Tstat THPU32HP7Y This model is designed toThe Venstar VST1010 is a commercial grade 1 day programmable thermostat engineered for precise 2 stage heating and 2 stage cooling applications. As a veteran preferred 2H 2C digital thermostat, it serves as the direct drop in replacement for legacy models including the 33CSSN2 WC, P474 0100, and P474 1010. This unit is compatible with 24V gas electric systems, heat pumps, and hydronic heating, ensuring versatile field utility. The Thermoglow backlit