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Kenmore Elite 790.47893603 oven won't heat up

mhicks

Premium Member
Joined
Dec 10, 2011
Messages
6
Location
Oregon
Model Number
790.47893603
Brand
Sears Kenmore
Age
More than 10 years
I have a Kenmore elite model 790.47893603 built in electric oven. I used the self cleaning function on the oven the other day (it worked) and now my oven won't heat up.

I pulled the broiler element to test its conductivity and it read 14 Ohms (which seems OK, but I can't find any specs for the element).

Both the bake element (in the bottom of the oven) and the broiler don't heat up. The convection fan spins up fine. And I can hear a relay cycling when I tell it to pre-heat for baking.

I tested the voltage at the broiler leads and measured 103VAC which isn't 120VAC, but I don't know what it should read.
 
Last edited:

Jake

Appliance Tech - Admin
Staff member
Joined
Aug 24, 2004
Messages
128,859
Location
Redmond, Oregon
Hi, The bake and broil elements need 240 volts to heat up properly.

It sounds like your thermal fuse maybe bad OR it may have just tripped, you may get lucky and just need to press the red reset button on it and see if that fixes it first.

If not, you can ohm test the thermal fuse in the back of the oven. Make sure you turn the breaker OFF first to your wall oven before accessing it and ohm testing it, also take both wires off of it first before ohm testing it.

It's located either on the top of the oven OR behind the back access panel in the very back.

You will likely need a helper to pull the wall oven out from the wall, it's very heavy.

Here's the thermal fuse for your model you can order if needed:
Thermal Fuse 318004900


Do you have a multimeter?

Watch this video to ohm test it: Thermal Fuse Ohm Test Video

Let us know what you find.

Jake
 

mhicks

Premium Member
Joined
Dec 10, 2011
Messages
6
Location
Oregon
Thanks for the info. Do you have any videos/instructions on pulling the oven out of the cabinets? There's no obvious clips to press to release the oven.
 

Jake

Appliance Tech - Admin
Staff member
Joined
Aug 24, 2004
Messages
128,859
Location
Redmond, Oregon
Your installation manual that came with it when it was brand new will tell you how it was installed, you do the reverse to uninstall it.

This is the only video I could locate:


Jake
 

Forevergrudge

Premium Member
Joined
Feb 22, 2022
Messages
6
Location
CT
I have a similar problem w/ model #790.41023801. I have checked continuity on thermal breaker, convection element & broiler element, all fine. I have 240v going to the oven but when I check the elements I have zero volts between the contacts on both elements and 110v if I check either side to ground. From what I'm hearing its the control board but.... when looking up the part there is a relay board, a convection relay board, a power control board and a electric oven control board. I'm a little confused on what part to order.
 

Jake

Appliance Tech - Admin
Staff member
Joined
Aug 24, 2004
Messages
128,859
Location
Redmond, Oregon
Hi,

Did you first check to make sure your thermal switch is NOT tripped? Did you ohm test it for continuity too, just to be sure its good? it should be located in the back of your bottom oven, you'd need to pull the range out from the wall then unplug it from the wall outlet(or turn the breaker OFF to it), then remove the back access panel and push in on the red reset button and see if that resets it.

Its mounted on the back of each oven. It has a small red reset button in the center that will pop out if it gets too hot. See if you can push it in to reset it. If it's pushed in ohm test it for continuity.

Make sure you disconnect power to your machine first before accessing/ohm testing it.

This video shows you how to ohm test it for continuity:

Here's the high limit thermal switch for your model:
318004902 Switch


If your high limit thermal switch is good, then its the oven control board that is bad. Yes, the oven control board controls the BAKE and BROIL elements on your model.

Here's the oven control board for your model:
316577015 Electronic oven control


Let us know what you find.

Jake
 

Forevergrudge

Premium Member
Joined
Feb 22, 2022
Messages
6
Location
CT
Yes, checked continuity on thermal breaker, convection element & broiler element, all fine.
thanks for your feedback. Question was because I was getting 110v's on the bake/broiler burners and not 220v could it be a relay control board? There are 4 control boards for this model
 
Last edited:

Jake

Appliance Tech - Admin
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Joined
Aug 24, 2004
Messages
128,859
Location
Redmond, Oregon
Question was because I was getting 110v's on the bake/broiler burners and not 220v could it be a relay control board? There are 4 control boards for this model
The oven control board I posted the link to above in post #6 is the control board that has your BAKE ELEMENT and BROIL ELEMENT relay's on it.:)

The other relay board control's your surface burner elements on the stovetop, that's all.:)

Jake
 

Forevergrudge

Premium Member
Joined
Feb 22, 2022
Messages
6
Location
CT
Hi Jake, I replaced the control board and still have the same problem. Any other suggestions?
 

Forevergrudge

Premium Member
Joined
Feb 22, 2022
Messages
6
Location
CT
Hello again, replaced the control board, still the same problem. Have been reading similar issues on other blogs saying the temp. probe being the problem. Thoughts?
 

Jake

Appliance Tech - Admin
Staff member
Joined
Aug 24, 2004
Messages
128,859
Location
Redmond, Oregon
You can ohm test the oven temperature sensor probe with a multimeter, normal reading would be between 1050-1100 ohms at room temperature. Turn your breaker off first to your oven before you do anything.

To get to the oven temperature sensor you would need to pull your oven out(you may need someone to help you, as these are very heavy) and take off the back access panel, then you will see the plastic connector that unsnaps to it.

Sometimes you can get lucky, by taking the screws out from inside the oven where the oven sensor mounts, you may be able to pull the oven sensor wire through the hole and test it without pulling the oven out from the wall.

Here's the oven temperature sensor probe for your model:
Temperature Sensor 316217002


Watch this video to ohm test it:


Let us know what you find.

Jake
 

Forevergrudge

Premium Member
Joined
Feb 22, 2022
Messages
6
Location
CT
Access to the back of the stove is easy, I'll be able to test it in a few days & let you know.
Thanks
 

Jake

Appliance Tech - Admin
Staff member
Joined
Aug 24, 2004
Messages
128,859
Location
Redmond, Oregon
Ok sounds good.

Jake
 

Jake

Appliance Tech - Admin
Staff member
Joined
Aug 24, 2004
Messages
128,859
Location
Redmond, Oregon
The normal ohms for the oven sensor should be 1050 to 1100 ohms at room temperature.

Jake
 
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