ensure the sensing lines are clear of debris and the diaphragm is oriented according to the manufacturer's specification for accurate pressure sensing

for propane applications

Rated for 400VAC and 50/60Hz

Direct Cross-Reference: Professionally recognized as identical to the 90-396021 conversion kit for simplified inventory management

whereas you should never replace a 440V unit with a lower-rated 370V model

Williams P323096 Fan Switch ensure the sensing lines areThe Williams P323096 Fan Switch is an essential OEM replacement component engineered for precision blower control in Williams Vented Room Heaters and Hearth Heaters. Designed specifically for integration with Williams Blower Accessory models 2101 and 2102, this switch manages the fan cycle to prevent the distribution of cold air during initial startup. By delaying blower activation until the heat exchanger reaches the appropriate temperaturetypically