It is technically identical to the Honeywell 4074ELR/U

Technicians should perform seasonal cleanings with approved commercial coil cleaners

it simplifies retrofits and new installations

and other common HCFC/HFC refrigerants

Lochinvar & A.O. Smith 100074281 Output Thermistor 320788-702 It is technically identical toThe Lochinvar & A. O. Smith 100074281 Output Thermistor is a critical NTC temperature sensor engineered for precise thermal monitoring in high efficiency tankless water heaters and commercial boilers. As a genuine OEM replacement part, this thermistor (equivalent to EKK2T) provides real time resistance feedback to the control board, allowing the system to modulate gas and water valves with surgical accuracy. This ensures consistent output water