KEBS207SSS04 Upper Oven Temperature Issues

[SKIPD]

Model Number

KEBS207SSS04

Brand

KitchenAid

Age

6-10 years

Hoping someone can advise further - Our initial issue was with the Upper Oven not reaching pre-set Temperature regardless of preset temperature level. Bottom oven worked fine. After reviewing this forum initially we made the following changes ...

1. Changed out the new temperature probe with a brand new sensor probe in the top oven - experienced the same issues
2. Ultimately changed out the Electronic Control Board to a new WPW10312205
   1. Top oven does now reach the pre-set temperature and we get the audio chime indication with the correct digital temperature displayed (never able to get this far prior to board placement)
   2. When measuring the actual temperature within the oven with an analog thermometer, the temperature reads 50-60 degrees lower than the pre set temperature we're looking for.
   3. We increase the pre-set temperature, oven chimes reads the temperature, and again we have the 50-60 degree difference

We've calibrated the oven and again the bottom oven works fine ... unclear where we go from here. Appreciate any guidance. Thank you

Skip

 

[Jake]

Hi Skip,

Those analog dial type oven thermometers don't read the temperature in "Read Time", and does take about 15 or 20 minutes to "Catch Up" with your actual oven temperature.

The only way to get an accurate measurement of the oven temperature is with a digital multimeter and thermocouple.

Here's the one that I always use:
Digital Multimeter DM10T


Read what our tech bigbuck said here:

FIXED - KODE507ESS02 oven does not maintain temperature

Upper oven of our double oven now 15 months old has never baked right and unfortunately didn't get to measuring temps until now. Preheats just fine to correct temperature, and will maintain that heat with nothing in oven. When baking, oven loses heat in latest test from 350 down to about 315...

www.applianceblog.com

Jake

 

[SKIPD]

Thanks Jake - Appreciate the response. Working to get the meter you recommend.

One additional note - Pre-Heating to say 400, oven chimes with display showing the 400, however again the hanging Thermometer being used inside on the rack reads 350 degrees. We've held that temperature for over 45 minutes with the thermometer reading the same 350 degrees. Guessing this maybe faulty so we ordered the meter you recommended. That said however, when we shut the oven off and immediately within seconds, reset new temperature to 425 the digital display showed the 350 degree's on the oven and again begins the pre-heating cycle from there. Oven chimes saying its reached the 425 degree's and the Thermometer inside reads 375 degrees. Repeated this multiple times with the same result.

Any additional suggestions from here ? - we've calibrated to add the +30 degrees max calibration and will double back with results when I get a chance. Any additional suggestions, or something we're missing ?

Thank you sir

 

[Jake]

Lets wait till you get the new multimeter with the real time temperature probe, before I make any suggestions.

Keep us posted.

Jake

 

[SKIPD]

HI Jake -
Utilized the DM10T Meter as suggested and our results for the Top oven ...

1. Calibration at Zero - Oven set to 250 degrees,Chime and Meter reading hits 180 degrees
2. Calibration set to +30 degrees - Oven set to 250 degrees Meter reading 217 degrees
3. Calibration set at +30 degrees - Oven set to 300 degrees Meter reading 262 degrees

Do we potentially have an element issue here? At visual examination when heating doesn't look any different than the lower oven element when heating. We did recheck the bottom oven at zero calibration, meter reading was in the ball park with oven set at 350 degrees and meter reading 347 degrees at its highest point ...

Appreciate the guidance. Thank you

 

[Jake]

What is the time frame its taking in preheat when it chimes saying it's done preheating? Normal preheat time would be about 15 to 20 minutes when the oven is room temperature at start.

If preheating is about 15 to 20 minutes then the element should be fine.

The appliance manager controls both top and bottom ovens with separate relays for each oven. So that would possibly be the problem.

Here's the appliance manager for your model:
WPW10119142 Electronic Control Board


Jake

 

[SKIPD]

Hi Jake -
We've been seeing 15-20 min to preheat. We replaced the Electronic Control Board to a new WPW10312205 as we mentioned previously which resulted in reaching temperature based on the digital display and chime notification for both ovens, with bottom oven working fine with temperature probe from DM10T positioned in the middle of the oven. The top oven continues to have uneven temperature measurement throughout the oven, closer to top element we reach expected temp, positioned in the middle of the oven, not so much. However when using the top oven in Convection mode and probe positioned in the middle of there oven, we have better results although we have some swing in target temp. Did we replace the wrong board initially ? -

Is the hidden bottom element not working correctly in standard cooking mode and creating this uneven heat ? I can't imagine that lower hidden element is used in convection cooking only ? We remain challenged here - appreciate the insight. Thank you

 

[Jake]

Thanks for mentioning hidden bake element, I had forgot about that. There have been problems with it.

Here's the service manual: https://drive.google.com/file/d/0BzvgAyLTSh14anVOeTlLYTdjV1k/view?usp=sharing

Removal of the UPPER OVEN hidden bake element starts at page 4-18. Make sure you turn the breaker OFF to your oven before you access it!

Here's the UPPER OVEN hidden bake element for your model:
Bake Element WPW10207398


Some members have reported the terminal connections on that hidden bake element were arching/burnt and causing the intermittent heat problem, if you find that's the case, you will need to order the new hidden bake element and replace it.

Let us know how it goes.

Jake