THE OVEN WILL NOT HEAT UP WHEN I PRESS TOUCH PAD MODE TO BAKE OR BOIL. INSTEAD IT SHOWS 5 A 6.

you can recalibrate it yes.

https://forum.appliancepartspros.com/posts/t191937-thermador-oven-temperature-thermostat

It's on page 32 of the manual for Thermador's built in convection ovens.
1. turn off the oven
2.touch and hold the start pad and then touch the bake pad
3. 0 (zero) appears in the temp digits. release all pads
4. touch bake and 0 changes in increments. max adjustment is 35 degrees F.
5. to complete change touch start for lower oven on double ovens do this: touch the roast pad instead of the bake pad continue with steps 3-5.

Please always include full 'make model (what it is)' in all questions.

To Adjust the Thermostat

1. Touch the BROIL HI/LO and BAKE pads at the same time for 3 seconds until the display shows SF.
2. Touch the BAKE pad. A two digit number shows in the display.
3. Touch BAKE again to alternate between increasing and decreasing the oven temperature.
4. The oven temperature can be adjusted up to (+) 35°F (19°C) hotter or (-) 35°F (19°C) cooler. Touch the number pads the same way you read them. For example, to change the oven temperature 15°F (8°C), touch 1 and 5.
5. When you have made the adjustment, touch the START pad to go back to the time of day display. Use your oven as you would normally.

To Adjust the Thermostat

1. Touch the BROIL HI/LO and BAKE pads at the same time for 3 seconds until the display shows SF.
2. Touch the BAKE pad. A two digit number shows in the display.
3. Touch BAKE again to alternate between increasing and decreasing the oven temperature.
4. The oven temperature can be adjusted up to (+) 35°F (19°C) hotter or (-) 35°F (19°C) cooler. Touch the number pads the same way you read them. For example, to change the oven temperature 15°F (8°C), touch 1 and 5.
5. When you have made the adjustment, touch the START pad to go back to the time of day display. Use your oven as you would normally.

Sorry to read about your problem, I hope this helps you out.

To Adjust the Oven Temperature (do not use Bake or Broil while adjusting the oven temperature): note: Your oven control was factory set in the (Fahrenheit) °F Temperature Display Mode. To change for (Celsius) °C, see page 15.
1. Press & hold the BAKE key pad and release after the display shows the factory temperature setting of 00. note: If the oven temperature has been previously adjusted from the factory setting, the current temperature adjusted value will appear in the display instead.
2. You may increase the oven temperature in 5°F (1°C) increments with each press of the uP arroW pad to a maximum oven adjustment of +35°F (+18°C). You may also adjust the oven temperature downward in 5°F (1°C) increments with each press of the doWn arroW pad (total range of -35°F to +35°F (-18°C to +18°C).
3. If you do not want to keep the display adjustment, press the clear oFF pad before the oven control beeps. This will cancel the temperature adjustment procedure. To start this procedure over again begin with step 1 above OR;
4. If you want to keep the adjustment, wait until the oven control beeps once.
5. The oven temperature adjustment has be accepted by the oven control and the display will return to the time of day.

I tried to help you. Please help me and Rate/Vote on my response, thanks and good luck

GE JKP86BF3BB COMBO MICRO/ELECT OVEN

NO HEAT ON BROIL OR BAKE ELEMENTS

CKD WIRING FROM PANEL OK
CKD TERMINALS AT ELEMENT HAVE 120V ON EACH ELMT
FAN COMES ON
THE ON INDICATOR SHOWS WHEN TMP &START PUSHED
MICROWAVE WORKS FINE
I ORDERED A NEW BAKE ELEMENT TO TRY-NOT HERE YET
STUMPED

You can re-calibrate the oven as follows;
press BAKE pad.
select temp of 500 degress or more.
immediately PRESS and HOLD the BAKE pad until "00" appears.
Then press the + or _ pad to adjust temp up or down 5 degrees at a time.
When fimished press the Clear/Off pad.

next to last page in your manual


Adjusting Oven Temperature
Oven temperature has been factory calibrated and tested. If
oven consistently over or under cooks food, adjust thermostat.
Oven temperature can be increased or decreased 35°F. To
avoid over adjusting oven, move temperature 5°F each time.
1. Push BAKE pad.
2. Press + pad until an oven temperature greater than 500°F
shows in display.
3. Immediately push and hold, approximately 5 seconds,
BAKE button until “00” appears.
4. Press + or - arrow pad to adjust oven temperature.
• To increase oven temperature (for a hotter oven), Press
pad until a positive number appears in display.
• To decrease oven temperature (for a cooler oven),
Press pad until a negative number appears in display.
5. Press OVEN CANCEL pad to save adjustment.
• Setting is saved if power fails or is disconnected.

heres a link to the entire manual if needed
http://shop.amana.com/assets/pdfs/literature/32103601.PDF

How to Exit the Sabbath Feature
Touch the Clear/Off pad.
If the oven is cooking, wait for a random
delay period of approximately 30
seconds to 1 minute, until only ⊃ is
in the display.
Press and hold both the Bake and Broil
Hi/Lo pads, at the same time, until the
display shows SF.
Tap the Delay Start pad until
12 shdn or no shdn appears in the
display. 12 shdn indicates that the oven
will automatically turn off after 12
hours. no shdn indicates that the oven
will not automatically turn off.
Touch the Start pad.
NOTE: If a power outage occurred while
the oven was in Sabbath, the oven will
automatically turn off and stay off even when
the power returns. The oven control must
be reset.

First of all, do not use the oven thermometers from a grocery store. they can be off by 20 degrees or more. These directions may help you for electronically controlled ovens. The older manually controlled ovens have a small screw head in the center of the oven temperature knob that can be adjusted in usually 10 degree increments.


To Adjust the Thermostat
Touch the Bake and Broil Hi/Lo pads
at the same time for 3 seconds until the
display shows SF.
Touch the Bake pad. A two digit number
shows in the display.
Touch Bake once to decrease (-)
the oven temperature, or twice to
increase (+).
The oven temperature can be adjusted
up as much as 35°F. or down as much
as 35°F. Touch the number pads the
same way you read them. For example,
to change the oven temperature 15°F,
touch 1 and 5.
When you have made the adjustment,
touch the Start pad to go back to the
time of day display. Use your oven as
you would normally.
NOTE: The thermostat adjustment for Baking
will also affect Convection Baking or Convection Roasting.

It's on page 32 of the manual for Thermador's built in convection ovens. 1. turn off the oven 2.touch and hold the start pad and then touch the bake pad 3. 0 (zero) appears in the temp digits. release all pads 4. touch bake and 0 changes in increments. max adjustment is 35 degrees F. 5. to complete change touch start for lower oven on double ovens do this: touch the roast pad instead of the bake pad continue with steps 3-5.