Thermador Range display board not working: Common Causes & How to Fix

Repair Instructions:

The range's LED board typically shows the time, temperature, and settings for the range. If the display only partly shows numbers or is dim, it's likely that the LED board is broken and should be replaced. If the whole display isn't working, the control board is more likely to be the problem.

How to Replace Range/Stove/Oven LED Board

1. Disconnect power. Turn off the breaker or unplug the appliance before accessing internal components.

2. Remove outer covering. Take off any screws or clips securing outer bezels, panels or trim pieces to access LED board.

3. Locate mounting screws. LED boards are usually attached to metal chassis with small screws in a several points.

4. Detach wiring connectors. Gently disconnect any wiring harnesses or cables plugged into the LED board.

5. Remove mounting screws. Using a screwdriver, withdraw screws holding old LED board in its position in unit.

6. Withdraw old board. Lift it out once fully unscrewed and disconnected from power cables.

7. Connect new board wires. Plug matching connectors from replacement into ports on new LED board.

8. Mount replacement board. Align mounting holes and refasten securely using original screws.

9. Refit outer panels. Replace any bezels or covers removed at the start of disassembly.

10. Reconnect power. Plug appliance back in to test lighting with installed LED board.

Repair Instructions:

The main control board gives power to the display board to make it work. If the display board isn't getting power, the main control board is probably broken and will need to be replaced.

How to Replace Range/Stove/Oven Main Control Board

1. Shut off power to the range at the circuit breaker. Turning off power prevents electric shock during the repair.

2. Remove any knobs or control panels by gently lifting straight up. Set hardware aside in a safe place.

3. Locate the control board, usually mounted under or behind the front control area.

4. Disconnect all wire connectors attached to the board by squeezing locking tabs and pulling wires free.

5. Remove mounting screws or brackets securing the board in place. Lift out carefully.

6. Insert the new control board into position and secure with original fasteners.

7. Reconnect all wire harnesses by firmly pushing connectors onto matching terminals.

8. Replace control knobs and panels by pushing or screwing items back into position.

9. Restore power and test features such as bake, broil, timers to ensure proper functioning.

10. Control board replacement is complete. Return range to normal operation.

Repair Instructions:

The oven control board shows the time, temperature, and settings for the range. If the control board has power but the display is not working, missing numbers, or is dim, it will need to be replaced.

How to Replace Range/Stove/Oven Oven Control Board

1. Shut off power to the range by locating the circuit breaker and shutting it off. This prevents electric shock.

2. Remove the control knobs by gently pulling straight up and off of the stems they attach to. Set aside.

3. Remove the control panel of the oven by locating mounting screws around the edges and carefully removing them.

4. Disconnect the wire connectors attached to the control board by squeezing release tabs and gently pulling wires free.

5. Remove mounting screws or other hardware securing the board in place. Lift out the old board.

6. Install the new control board and attach with original mounting screws or hardware.

7. Reconnect wire connectors to matching terminals, ensuring colors or locations match up properly.

8. Replace the control panel and mounting screws around the edges.

9. Reattach control knobs by pushing them back onto the stems.

10. Restore power and test ovent functions like bake, broil, temperature controls.

Repair Instructions:

If the display board isn't working, it might not be receiving power from the main control board. If the display board has power but the display isn't working, missing numbers, or is dim, it will need to be replaced.

How to Replace Range/Stove/Oven Display Board

1. Disconnect power. Turn off the circuit breaker or unplug the appliance before servicing internal parts.

2. Remove front panel. Take off any screws or clips securing the front decorative piece to access inner components.

3. Locate mounting screws. The control board usually attaches to the unit chassis with several small screws.

4. Remove mounting screws. Use a screwdriver to withdraw the screws anchoring the old display board in the housing.

5. Detach wiring connectors. Gently disconnect any wiring harnesses plugged into the board being replaced.

6. Remove old board. Lift it out once all mounting screws are taken out and wires separated.

7. Connect new board wires. Plug matching connectors from replacement into the ports on new display board.

8. Mount replacement board. Set into place and refasten securely using the original mounting screws.

9. Refit front panel. Replace screws or clips to securely hold outer decorative piece back in position.

10. Reconnect power. Plug unit back in to test operation with installed display board.

Repair Instructions:

For many ranges, the control board works directly with the display to show the time, temperature, and settings for the range. If the control board has power but the whole display isn't working, the control board is probably broken and will need to be replaced.

How to Replace Range/Stove/Oven Oven Control Board

1. Shut off power to the range by locating the circuit breaker and shutting it off. This prevents electric shock.

2. Remove the control knobs by gently pulling straight up and off of the stems they attach to. Set aside.

3. Remove the control panel of the oven by locating mounting screws around the edges and carefully removing them.

4. Disconnect the wire connectors attached to the control board by squeezing release tabs and gently pulling wires free.

5. Remove mounting screws or other hardware securing the board in place. Lift out the old board.

6. Install the new control board and attach with original mounting screws or hardware.

7. Reconnect wire connectors to matching terminals, ensuring colors or locations match up properly.

8. Replace the control panel and mounting screws around the edges.

9. Reattach control knobs by pushing them back onto the stems.

10. Restore power and test ovent functions like bake, broil, temperature controls.

Repair Instructions:

The range's control panel typically shows the time, temperature, and settings for the range. If the control panel has power but the display isn't working, missing numbers, or is dim, it will need to be replaced.

How to Replace Range/Stove/Oven Control Panel

1. Shut off power to the range at the circuit breaker for safety during replacement work.

2. Remove any control knobs by gently wiggling and lifting them off their stems. Set aside neatly.

3. Locate the mounting screws around the perimeter of the control panel underside.

4. Remove the mounting screws using a Phillips head screwdriver.

5. Carefully lift off the old control panel. It may stick slightly due to food debris or grease.

6. Clean any residue from the range surface. This ensures a good seal for the new panel.

7. Set the new control panel in place aligning any wire connections or screw holes.

8. Replace mounting screws around the entire outer edge tightly but do not overtighten.

9. Reattach control knobs by pushing them firmly onto their corresponding stems.

1. Restore power and test all functions. Replacement is now complete.

Repair Instructions:

The control module is the brains of the range, housing the computerized control board and regulating all electrical operations. If the control module is malfunctioning, it can disrupt communication to the display board causing it to go dark. Issues like corrupted firmware, overloaded circuits, loose wiring connections, and power surges can all cause the control module to glitch. This interrupts the signals being sent to the display board and its ability to light up and show cooking modes. Without direction from the control module, the display board will lack power or data input and will not be able to activate. Technicians will need to run diagnostics on the control module and circuitry to identify any shorts, disconnects, or firmware bugs. The module may need reprogramming or total replacement.

How to Replace Range/Stove/Oven Control Module

1. Disconnect power. Turn off the breaker or unplug the appliance before servicing internal parts.

2. Remove outer panels. Take off any screws or clips securing decorative panels to access control module.

3. Locate mounting points. Control modules mount with screws, usually atop metal chassis or recessed into housing.

4. Disconnect wiring. Gently disconnect any cables or plugs connecting module to other appliance circuits.

5. Remove mounting screws. Use a screwdriver to remove screws affixing old module at mounting points.

6. Withdraw old module. Detach fully by lifting module out once all screws are removed and wires separated.

7. Connect new module wires. Plug matching connectors from cables to ports on fresh replacement module.

8. Mount new control module. Set into place on mounting points and refasten screws securely.

9. Refit outer panels. Replace any trim pieces or bezels removed at start of disassembly process.

10. Reconnect power. Plug appliance back in to test functions with new control module installed.

Repair Instructions:

If some parts of the range's main display are working, but the 'hot' light for the surface element isn't, it's likely that a radiant surface element is broken. You can use a multimeter, a tool that checks if electricity can flow through something, to test the radiant element for electrical continuity. This can help you figure out if the part is faulty.

How to Replace Range/Stove/Oven Radiant Surface Element

1. Shut off power to range by flipping the circuit breaker or unplugging the power cord. This prevents shock during replacement.

2. Remove any cookware from the radiant element surface to improve access.

3. Remove mounting bracket/retainer ring. Look for securing screws or clips around edge. Remove to detach element from cooktop surface.

4. Disconnect wire leads from element terminals. Use pliers or a flathead screwdriver to release each wire one at a time, taking note of positions.

5. Carefully lift out old element through cooktop opening. Wiggle as needed to detach fully from any remaining mounts.

6. Adjust orientation of new element. Position wire leads and terminals to align with cooktop feed-through area.

7. Replace mounting bracket/retainer ring. Secure with original screws or clips to hold element in cooktop cutout.

8. Reattach wire terminals by inserting firmly with pliers into matching positions on new element.

9. Restore power and test heating. Monitor with hand to ensure element reaches operating temperature.

10. Replace any cookware and cleaning is complete.

Repair Instructions:

If some parts of the range's main display are working, but the 'on' light for the surface element isn't, it's likely that a surface element switch is broken. You can use a multimeter, a tool that checks if electricity can flow through something, to test the surface element switch for electrical continuity. This can help you figure out if the part is faulty.

How to Replace Range/Stove/Oven Surface Element Switch

1. Shut off power. Locate the circuit breaker for the range and shut off power to the appliance. It is important to ensure there is no power flowing to avoid shock.

2. Remove control knob. The burner control knob will usually pull straight off when wiggled gently. Set aside knobs so they can be replaced in the correct position later.

3. Unscrew switch mounting screws. Look under the control panel for small mounting screws securing the switch in place. Remove screws using a Phillips head screwdriver.

4. Disconnect wires. The switch will have wires connected either by screw terminals or wire nuts. Carefully unscrew terminals or unwrap nuts to separate wires from old switch.

5. Remove old switch. Lift out the old switch once fully disconnected. Check for any gaskets or seals around the opening and save if reusable.

6. Install new switch. Line up the switch in the opening and connect wires to the matching terminals. Be sure to attach wires to the correct terminals as marked.

7. Secure and test switch. Replace mounting screws to secure the new switch tightly. Restore power and test each burner control by turning knobs to the ""On"" position.

8. Replace control knobs. Slide knobs back onto switch stems, matching them to the proper burners. Testing is complete.

Repair Instructions:

Many ranges have a child lock or "Sabbath" feature that stops the buttons from working when it's turned on. The range could also be in "Demo" mode or another mode that stops it from working fully. Check the user manual for your range for information on how to lock and unlock the control panel.

Repair Instructions:

Electric ranges need 240 volts of alternating current, while gas ranges need 120 volts. If the display board isn't working, there might be a problem with the power coming in. For a gas range, if the oven light turns on and the burner sparks, it means the range has power. For an electric range, try turning on one of the surface elements. If any of the elements work, the range has power. If the range doesn't have power, check if the circuit breaker has tripped or if any fuses have blown and fix them as needed.