If your Thermador oven meat thermometer is not working, the meat probe is the most likely cause. The probe's resistance changes as its temperature changes, and an open circuit during a multimeter test indicates that the probe needs replacement. A failed control board is the next likely problem, especially if the oven probe and probe jack test good but the display does not respond or shows a probe error. Some Thermador ovens also require the door to be closed before the oven thermometer will function. A defective door switch can prevent the control board from recognizing that the door is closed, so test the switch for continuity when actuated. The probe receptacle, also called the probe jack, may be dirty, corroded, damaged, or unable to make solid contact with the probe. If those parts check out, the oven control board may be faulty. Enter your Thermador oven model number to find the exact meat probe, control board, door switch, receptacle, or oven control board replacement part for your specific appliance.
01 - Thermador Range/Stove/Oven Meat Probe
The meat probe resistance changes with the temperature of the probe. If the probe shows an open circuit when tested with a multimeter, the probe is bad and will need to be replaced.
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When the probe is plugged into the jack, the control board monitors the food temperature from the probe. If the temperature probe and jack are good but the control board is not responding, the control board is likely bad.
Some oven meat thermometers will not function properly unless the oven door is closed which activates a door switch to alert the control board that the door is closed. If the door switch is defective, the oven meat thermometer may not work. To determine if the switch is defective, use a multimeter to test it for electrical continuity when actuated. If the door switch does test appropriately for continuity, replace it.
The meat probe jack or receptacle needs to be clean and making good contact with the meat probe. If the receptacle appears corroded or damaged, the component should be replaced.
05 - Thermador Range/Stove/Oven Oven Control Board
When the probe is plugged into the jack, the oven control board monitors the food temperature from the probe. If the temperature probe and jack are good but the control board is not responding, the control board is likely bad.