1. A method of monitoring a sealed compressor comprising: providing a sealed compressor canister housing a motor and compressor into a refrigerant system, and providing a charge of refrigerant within said refrigerant system; placing a sensor adjacent a discharge end of said compressor to monitor a condition of the compressor indicative of the amount of refrigerant charge within said system said sensor being provided by a heat fusible link; sending a signal to a control to stop operation of said motor should said sensor determine that there is an inadequate supply of refrigerant within said compressor system said heat fusible link melting when a predetermined temperature is reached to send said signal; and stopping operation of said motor until a service call is made.