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the 3821-00 is a "Less Coil" model
this immersion unit is designed specifically for liquid sensing in thermowells
replacing the complete venter blower kit ensures the housing and blower wheel are free of corrosion and stress fractures that cause systemic failure
The 8A18Z-2 control box features an integral transformer that allows for line voltage flexibility
Common Questions How do I configure the CCC-1002 for direct versus reverse action
Lennox 33H78 Limit Switch 320074-702 the 3821-00 is a "LessThe Lennox 33H78 Limit Switch is a critical OEM furnace safety control engineered for precise thermal monitoring in residential and commercial Lennox heating systems. Labeled with an L130 20F temperature rating, this high limit switch is designed to open the electrical circuit at 130F and automatically reset when the temperature drops 20F. As a vital HVAC replacement part, it prevents heat exchanger damage and hazardous conditions by interrupting the
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