II have a Sharp convection microwave oven model R-8340. I found that the temperature thermister has failed in the shorted state causing the cooling fan to run continuously. I am unable to locate a new thermister P/N FHHZ0019WRE0 as everyone says that it is an obsolete item. Can you provide me with the electrical characteristics of this thermistter so I may order the correct one. Thank you. George E. Lynch airbusdtw1@aol.com