Nicholas P Warwick , RI July 19, 2014 Appliance: Frigidaire Gas Range PLCS389ACA Frigidaire Range Plcs389aca: Low temperature. How to replace Clock/Timer, Electronic , Black. I posted a question to the forum about the temperature problem my range was having. i received a reply the next morning. i replaced the control unit after the probe and element checked out ok. with the new control unit the oven heats to and maintains the correct temperature. the project took about ten minutes. only needed to remove six screws. Do-It-Yourself Rating: Repair Time Estimate: Less than 15 minutes