Laars Heating Systems R0457501 HSI 321142-301 always disassemble the valve and

always disassemble the valve and remove the internal sub-assembly before applying heat

As long as the Sensus gas regulator is rated for LPG and the desired outlet pressure falls within the black spring's 1-4

and incorrect phase sequence

technicians should verify the unit’s cabinet width and coil orientation to ensure a proper seal and slope

The Carrier EA36YP289 Valve Assembly is a high-performance thermostatic expansion valve (TXV) designed to maintain the exact superheat required by the evaporator coil under varying thermal loads

Laars Heating Systems R0457501 HSI 321142-301 always disassemble the valve andThe Laars Heating Systems R0457501 HSI is a high performance silicon carbide hot surface ignitor engineered specifically for Jandy Legacy LRZE and Teledyne Laars pool heaters. For technicians servicing LRZ models 125, 175, 250, 325, and 400, this OEM component is the standard for restoring reliable ignition sequences. Unlike generic alternatives, this pool heater ignitor is designed to handle the high temperature environment of the burner assembly