This limit control is primarily used in Lennox 80UHG

The Trane VAL9030 Gas Valve is a technical-grade 1/2" 24V 2-stage gas valve engineered specifically for high-efficiency Trane J-Series furnaces and light commercial heating equipment

allowing for flexibility depending on the burner and electrode setup

Technicians typically identify failure through high-pitched operational noise

Setra 231G-MS3-2F-D Pressure Transducer 30067439-890 This limit control is primarilyThe Setra 231G MS3 2F D is a high performance wet to wet differential pressure transducer engineered for demanding hydronic and HVAC applications. Designed for maximum field flexibility, this multi configurable pressure sensor features 8 switch selectable ranges, covering 25, 50, 125, and 250 PSID in both unidirectional and bidirectional modes. This eliminates the need to carry multiple single range units, simplifying inventory and ensuring on site