Hi @wildwest1 ,
Check if the [https://www.partselect.com/Models/PLHS237ZDB3/Sections/SYSTEM/?ModelID=1015545&ModelNum=PLHS237ZDB3&mfgModelNum=&ManufactureID=4&Selected=PXWR34SS&Position=10&mfg=Frigidaire&Type=Washer&Mark=10|defrost heater] (system parts #F14) is OK and if so if then check if the [https://www.partselect.com/PS469522-Frigidaire-5303918214-Defrost-Thermostat-Kit.htm?SourceCode=22&SearchTerm=&ModelNum=PLHS237ZDB3&sSearchTerm=Fridge-too-warm|defrost thermostat] (system parts #21) is OK.