Steve S Hull , MA December 19, 2020 Appliance: Frigidaire Gas Range FGFLZ87GCF Frigidaire Range Fgflz87gcf: Oven wouldn't maintain heat once it came up to temperature. How to replace Oven Probe. I watched a video on YouTube and was able to replace the temperature probe without too much of a problem. The hardest part was diagnosing what needed fixing and then accessing the back of the oven (it's in a tight spot) Do-It-Yourself Rating: Repair Time Estimate: 30-60 minutes