What is the difference between the 93 and the 93-M

It is a factory-authorized direct substitute for older part numbers

protecting internal components from environmental contaminants in outdoor units

reducing the risk of pan sagging or cracking under the weight of accumulated condensate

verifying the fan blade rotation and pitch is critical to restoring factory-rated cooling capacity

Lochinvar & A.O. Smith 100110731 Sensor Assembly R-22 What is the difference betweenWhen you're troubleshooting erratic temperature readings or ignition lockout codes on Lochinvar Knight or A. O. Smith residential gas water heaters, the Lochinvar & A. O. Smith 100110731 Sensor Assembly is often the critical point of failure. This OEM water heater temperature sensor is engineered as a high precision resistance type device, specifically designed to provide the control board with real time thermal data required for internal modulation