Model #JES9800AAS, this slide in range had recently been serviced by a local service company for the convection fan not working. The tech determined the fan was the problem and returned to replace it, but that didn’t resolve the problem. Thinking the control board must now be the issue, the technician again returned to replace the range electronic oven control, but still the convection fan was not working. Frustrated, the customer asked me to take a look at the range to see if I could resolve this problem
Convention fans are used in ovens to help move heated air around the oven cavity and the food within. This airflow creates a more consistent temperature throughout the oven allowing you to cook more items together and at lower temperatures. Many people like the benefits of convection cooking for things such as cookies because more can be cooked on each of the racks, and they bake very evenly.
The problem on this range was as simple as the fan was not working. A very simple electrical circuit if you look at the tech sheet, but the original technician was not able to get things working. This was most likely due to a poor troubleshooting process and not an overly complex failure.
When the first technician arrived to look at the range, he made a logical choice to replace the fan as it is the likely failure. A simple voltage check at the motor with a good multimeter would verify the fan as the problem, which I understand he did, but replacing the fan didn’t resolve the issue. At this point the technician decided to replace the control board, even though he verified it was working properly. This is why it is important to do accurate checks with your multimeter, and then verify your checks another way if possible. Let me explain.
When I arrived at the home, I removed the convection fan to begin some electrical checks with my meter. With the oven door switch closed, this is important because most ovens will turn off the fan when the door is opened, I was reading 117 volts AC at the fan connector. This proves the board as being good and most likely, the fan is the problem. A good rule of thumb is if you have voltage to an electrical load and it doesn’t work, replace the component. But seeing the first tech already did this, I figured I wanted to continue with my checks.
Next I did a resistance check of the motor to verify both the coils were complete circuits. This motor uses two windings to allow for high and low speed operations so it is possible for one to fail but the other to still work. But when I checked with my meter, I was reading both circuits as open which means this new motor was not going to work. Some further investigating of the motor connectors found the common connector for both coils had a broken wire. An odd failure right out of the box, but as you can see, entirely possible.
I replaced the convection fan motor with a new one, after first verifying both coils were working, and then installed it to the oven back panel. After beginning a test cycle, the fan started right up once the door was closed. The customer was happy to finally have the oven fully functional, and I was glad I could help.
Just a note about this particular problem. The first technician did the right thing by testing the circuit and replacing the motor. But a second check was not made to confirm the failure and once the new motor didn’t work, he slipped into what I call superstition mode. Meaning instead of trusting his judgement and checks, he started to throw parts at the problem. This is why I always suggest to verify electrical failures two ways, because it’s always better to KNOW what the problem is and not HOPE you know what the problem is.
Presented by – All Tech Appliance Service, your Portland Oregon appliance repair company. We service many brands of refrigerators, washers, dryers, ranges, dishwashers, freezers, ovens and microwaves including popular brands like Whirlpool, Kenmore, Maytag, Frigidaire, Amana, GE, Jenn Air, Ikea, Sears, Estate, Roper, Electrolux, KitchenAid, Fisher & Paykel and more. We also provide preventative appliance maintenance, dryer vent cleaning, replacement appliance installation, and property management appliance service. Visit us online at www.AllTechAppliance.com