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Thermador SC301T and SC302 stack ovens have a weakness in the radial capacitors on the circuit board behind the LED clock. They get cooked from heat.
Here is the fix:
- Remove two screws from the control panel, located facing up at the bottom on the panel frame.. open the oven door to see them.
- The panel is then held in place by push in toggles at each end, pull towards you to remove.
- Carefully unplug the three wiring harness plug-ins, and check them to see if any wires are loose.
- Set the panel aside. Remove 3 screws holding in the LED assembly, and again unplug the wire harnesses, examining each for loose wires at the terminal.
- When unplugged, take the LED assembly to the bench, remove the plastic housing, and with a mini soldering iron and watchmaker's eyeglasses, or hobby magnifier, identify, heat, and remove two 35v 450uf 105 degree radial capacitors, and one 35v 68uf 105 degree capacitor. These are ordered from MCM Electronics (google it) and are p/ns 96K0326 and 96K0331.
- Insert new parts, solder and clip excess leads. Carefully examine the printed circuit board around the area of the leads you just soldered, as some boards do not have the copper close enough to the hole to make contact.
- Scrape the green insulation from the conductor near the hole to expose copper and make sure your solder makes contact with the copper and the lead. Use your multi-tester when finished to check continuity from all leads you just soldered and their nearest neighboring contact on the circuit board.
- I found a loose wire on the harness to repair, and one contact on a capacitor did not have the copper close enough to make contact without extra effort. When all is completed, reassemble.
- Turn back on power at the circuit breaker. You may get an F7 error code.
- Off with the power again, wait 3 minutes. Restore power, go to oven and press the OFF position on the glass control panel... hold for 10 seconds, and the clock should now be steady at 12:00. Push clock position, reset clock for proper time.
- Test oven light on/off.
- Test bake/temp/convection buttons, on/off.
This is a good fix, and will save you about $469.00 in parts and $500.00 in labor.
The new 105 degree centigrade high temperature radial capacitors replace old 85 degree, which fail, and your repair should last. Total parts and shipping costs.. about $10.00
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