checked bottom Vulcan convection oven. fan not shutting off with door opened. cannot shut oven down due to customer cooking. only have this oven right now with top oven down. also, left door handle broken. must replaced as a set. this original handle is no longer available. Will obtain necessary parts, return and replace. QWP authorized by Thane Gehret. 6/12/19 arrived on site to repair bottom Vulcan Hart convection oven. proceeded and replaced both door handles and door micro switch. brought oven into operation. customer mentioned that they were having trouble with oven heating prior. checked and found power level potentiometer going bad. disconnected plug on temperature control board for power level. customer said that they always leave the power level on 10 all the time. customer does not want this feature repair at this time. brought oven into operation and checked door switch operation okay. with door open, fan now shuts down. oven heating fine. oven in service.