Honeywell DT90e will not switch back on. It just shows a temperature of 5 degrees

SOURCE: Digital Control (for oven temp and clock adjustment) not working

Puzzeled, usually when there is a stuck or shorted keypad there will be an error code. First let's see if we can tell if we are in Centigrade or Ferenhiet. Press the bake and broil button together for 2 or 3 seconds. SF should appear in the display. Press the broil pad again and C or F will be displayed. Toggle to F and press start. See if that was the problem. If not try to increase the speed of the + and - keypads. Press bake and broil together for 2 seconds until SF displays. Press the + keypad increase the speed of the control. It should toggle from 1 to 5, 5 being the fastest. Press start and see if that works. If niether works..then have someone remove the keypad ribbon cable from the control board and clean the ends with an eraser. See if that solves the issue...Catriver..post back and let me know.

SOURCE: GE Spectra XL Oven does not maintain oven temperature

I have the exact problem. We had the ignitor replaced 2 already and it works for 18 months and stops. Occasionally, it the oven won't even start to heat. I am ready to throw it out.

SOURCE: Oven does not maintain temperature. Part 2

sometimes when they get hot that is when they fail

SOURCE: Oven does not heat to proper temperature

get a new oven

SOURCE: Temperature varies 13 degrees around setpoint on aux heat

I don't have the book for this particular unit but, check the sequencers that control the electric heat mode, as the regulator heat pump works good. The part may have a time or temperature delay that is too long for you. Also if it has a remote thermostat, check the heat anticipate setting. You will have to check the installation manuel, but its usually .6 to .8, but I don't think that is the problem.