Peter H Des Plaines , IL June 07, 2017 Appliance: Frigidaire Electric Range GLEF378CSD Frigidaire Range Glef378csd: Oven temp was varying + or 25f. How to replace Probe. Replaced oven temp sensor. Connector on new probe was different from original; had to splice old connector onto new probe using ceramic wire nuts. Do-It-Yourself Rating: Repair Time Estimate: 15-30 minutes