Daniel L Jacksonville , FL January 10, 2015 Appliance: Maytag 30" Electric Built-In Downdraft Cooktop JED8430BDB18 Maytag Cooktop Jed8430bdb18: The fan switch not working. How to replace Fan Control Switch. To replace the switch you have to disconnect all the wiring and take out the cooktop. Open up the bottom support case to take the switch out. The switch cannot be taken out from the top. It was much harder than I thought. Put the new switch in and the fan was working again. Do-It-Yourself Rating: Repair Time Estimate: 30-60 minutes