The most common reasons your oven display is not working are a defective electronic control board, defective control panel or a dead power supply.
One of the top causes of an electronic oven control board failure is power surge damage. An electrical power surge is often caused by a close lightning strike during an electric storm. Power surges can also be caused by power outages, electrical grid overloads, utility service provider load shifting and wind storms.
Control Board
Control boards cost $150 and $300, all-in, to repair. The control board is responsible for all of your oven's key functions.
Leave the oven disconnected for a couple of minutes. Electronic control boards have capacitors that hold charge even after the power is disconnected. Waiting for a few minutes ensures that these capacitors are fully discharged and the control board is reset. After waiting, reconnect the oven to the power source.
If you discover that your oven has broken down and requires an expensive repair, such as replacing the electronic control board or the control panel, it may be time to buy a new one because that oven won't last much longer.
The rule of thumb is that if repair costs exceed 50% of the price to install a new oven, you should buy a new oven instead of replacing it. For example, if your oven costs $2,000 but costs $1,500 to repair, you could use that $1,500 for a new and improved oven.
If the range or oven is receiving power but doesn't work, the unit may have its own fuse or circuit breaker assembly. This assembly is usually located under the cooktop of the range.
Turn the circuit breaker to the OFF position or remove the fuse. Wait one minute, then turn the circuit breaker back to the ON position or install the fuse to reset power to the appliance. This should reset the electronic controls on the Range or Wall Oven.
Longer Cooking Times: If you find that your food is taking longer to cook than usual, it could be an indication that the temperature sensor isn't working properly. This can result in the oven not heating to the desired temperature, causing the food to take longer to cook.
Electrical Surges
Often caused by lightning strikes, power outages, or fluctuations in the power grid, these surges can cause irreparable damage to the electronic components, leading to either immediate or gradual failure of the control board.
Make sure the multimeter is calibrated and then turn the dial to the lowest ohm rating. Place the multimeter on the thermostat. If the thermostat has a reading of zero or as close to zero as possible, it is working fine. However, if it has no reading at all, your oven thermostat is faulty and will need replacing.
If you're experiencing an issue where your oven won't turn on but the stove works, there could be a few possible causes. The reasons may include problems with your power supply, gas supply, gas igniter or electric oven heating elements.
Oven control board replacement costs $150 to $600. A new oven control board costs $60 to $250 for the part alone. The control board regulates the temperature and all functions.
Considering ovens can last 15 years (and sometimes more), it is likely a better idea to repair a 10-year-old oven, assuming the repair won't cost more than 50% of the oven's value. So, for instance, if your oven is worth $1,200 and the repair is only $400, it's a better option to complete the repair.
The life expectancy of an electric oven is around 13 - 15 years. The life expectancy of a gas oven is around 15 years. The life expectancy of a dual-fuel oven is also around 15 years. However, the lifespan of these kitchen appliances depends on how frequently you use them.
Some of the more likely causes are a faded or broken screen, wiring issues, problems between the power supply and the control board, or wear and tear on the screen.
If you see any damage, the control board will need to be replaced. To test the control board, you will need a multimeter. Set the multimeter to the resistance or continuity setting. Touch one probe to a terminal on the control board and the other probe to a ground, such as the metal frame of the oven.
If the repair costs are low, you are better off paying for the repair than replacing it, even if your stove is over twenty years old.