System Longevity: Prevents long-term thermal stress on the blower motor and internal wiring by enforcing strict temperature limits

the Johnson Controls T-4000-119 is the standard Allen head adjustment tool required for the precise calibration and maintenance of T-4000 series pneumatic thermostats

protecting the compressor from high discharge heat

maintaining the thermal efficiency of the refrigerant line set

allowing for versatile sensor placement within the evaporator or cabinet environment

Trane VAL9478 TXV 320788-703 System Longevity: Prevents long-term thermalThe Trane VAL9478 is an OEM grade thermostatic expansion valve (TXV) engineered specifically for 4 ton cooling applications. Designed for high pressure R410A refrigerant, this component features a 3 8" ODF inlet and a 1 2" ODF outlet, ensuring low restriction sweat connections in residential and light commercial air conditioning systems. The 5 foot capillary tube provides the necessary reach for precise bulb placement on the suction line, allowing for