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Error code F3 on Kenmore 911.4658815 electric range

I get a F3 error code when we try to use the oven self clean function.  After the oven heats up for about 10 minutes, it will beep and give the F3 code.


Any idea what needs to be replaced?

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Re: Error code F3 on Kenmore 911.4658815 electric range

Mode lUP 48500 ( thats eye you, not ONE U )

I got the dreaded F3 error on the Display Panel,
every time I pressed BAKE or BROIL, BUT, I could
hear the three relays click in, and then kick out in
sequence, just before the F3 appeared.

I called Westinghouse ( that services INGLIS ) and
was told that F3 " means unpug for 1/2 hour and then
press CLEAR 5 Seconds to reset ". Which is nonsense.

All functions on the clock and timer work fine, and the
three relays were working, so its not a computer problem.
I called service REPAIR companies who said it was the
THERMOSTAT, and replace it - $147.99 ... The Glass tube
of the display is $200 with no circuit board, the relay board
is $300 and the computer/display is $400.

I did tests on the thermostat, first heating it with a propane
lighter, and it raised from 475 Ohms at room temperature,
to 600 ohms, so I knew it was functioning.

Then, I plugged in a variable resistor where the thermostat
plugs in. I went from Zero Ohms resistance to 5000 Ohms in
200 Ohms steps.

Zero Ohms ( equal to burnt out or unplugged) gives you
an immediate F1, which you cannot clear.
From 100 Ohms to 400 Ohms, you get Error F2, which
means thermostat too low.
From 400 Ohms to 665 Ohms there is no error.
At 665 Ohms, the BAKE will beep twice, stating that you
are setting the temperature at or lower than the actual temperature
of the oven ( you cant set the oven at 200, for example, if it is
already at 450 Degrees )
Using this 2 Beep code, I raised and lowered the resistance
and made a graph of the reading on the display versus the
OHMS that the thermostat would send to the controller:
665 Ohms = 170 Degrees Farenheit, which is the
lowest reading in the BAKE MODE.
800 Ohms = 240 Degrees
1100 Ohms = 380 Degrees
1400 Ohms = 500 Degrees, which iis the maximum that
the unit showed in the BAKE MODE.
1430 Ohms to 2750 Ohms, there was no reading, an NO ERRORS.
ABOVE 2750 OHMS, the F1 ERROR appeared again, meaning
thermostat out of range.

Note that the computer module supplies 5 volts DC to the thermostat,
to see the changes in current with changing resistance.
You can easily check the thermostat to see if it is OK, with an
Ohmeter across the thermostat, which should read about 475 Ohms
at room temperature. If it reads Zero, it is burnt out. If it reads
over 2750, it is defective. Check to see if the thermistor in the
tube is SHORTED to the steel outter case as well, as this should be
infinite ohms ( no contact )- if it reads ZERO it is shorted to case.

I found that on the Internet, there are hundreds of people looking for
the F3 code for the ROYAL 100 ( model number IUP 48500 )
and a general search shows that for 400 " other" models of all kinds,
F3 = REPLACE THERMOSTAT ! Not on this model, and all typical searches
for technical support or diagrams or troubleshooting did not even list
the Royal 100 AT ALL, as if it never existed.

I then did tests on the relay board, and replaced the capacitors, a few diodes,
some resistors that were a bit out of value, and two transistors that were
a bit out of value. There was no change in F3.

I cleaned the contacts on the three relays using a typical board fingernail
file that ladies use for their finger nails ( I keep a supply for cleaning
relay contacts, since there is sandpaper on both sides, and they are
tiny enough to fit between most contacts ). THEN, I realized that the BROIL
contacts were bouncing apart - they were too far apart, and not closing
properly, so I bent the stationary contact a bit closer, and plugged in the
stove = NO ERRORS..

I analysed the circuit, and after turning on the 3 relays ( NOTE, when you
turn on BAKE, as in a regular oven, THE BROIL ELEMENT goes on at first
to quickly help the BAKE element get the oven up to temperature )
there is a feedback circuit that feeds 250 Volts back into the 5 Volt computer
chip ( ! ! ! ) It uses two 22 Meg Ohm resistors in series for a total of 44 Million
Ohms, which shows about 46 volts accross the resistors. Since the gas
tube display uses 30 volts to light up, the 46 volts is within the computer
board's ability to lower it enough to feed into the computer. There are transisors
on the back of the control board and Zener diodes etc. to " compare " the
voltage, where 46 volts in = 250, and Zero volts, means that the element
is burnt out, the element fuse in the fuse panel is burnt out, or, the relay
contacts are dirty. The relays are absolutely standard 24 volt relays,
with a plasic cover that snaps off if you pull and wiggle it. You will see
the round silver contact pads are blackened and probaly pitted.
Sand these flat until silver/brass shiny, and test to make certain that
when you press the metal lever that the magnetic coil pulls DOWN,
that the contacts touch! If they do not touch tight, bend the
stationary contact in a tiny bit and test again.

You can first check the fuses - there are two 120 volt fuses in the
fuse panel that give you 250. Then, you can unplug the stove,
and use an OHM meter to see if the element is burnt. The two types
of elements I checked were 3000 Watt at 18.7 Ohms, and 2500 Watt,
at 48 Ohms. If the elements are burnt out, you will get ZERO ohms.
If the element is burnt internally through the insulation in the tube,
and shorting to ground, between the ends and the steel back of the
stove ( ground) you will get a reading of X amount of ohms ( which
normally should be ZERO ) If the element is burnt or shorted to
ground, replace.

The F3 error is a really dumb mechanical errror of whether the 250 volts
is on the elements. It does not involve the computer or the thermostat,
or the relay " electronics" at all - it is just simply 3 contacts that supply
250 Volts, and whether or not the contacts work, the elements work,
or the fuses work. This the same 250 Volts that is on an ordinary
dial stove, and the dumbest part of the whole unit.

When I called service, they said they would order the $147.95 temperature
thermostat, and " see if this fixes the problem", if not they would start
replacing the modules - $300 and $400, plus labour, plus tax etc., and
since the problem was on the module, this would cost $147.95 + $300,
plus $75.00 for the first 15 minutes, and $15 for each additional 15 minutes,
for a total of about $466 dollars ( CDN ) which is about $460 dollars US.

A package of 25 fingernail files is $1.00 at the dollar store. That is all that
it cost to fix the problem. You need a square ( Robertson ) head screwdriver
to remove the 7 screws on the back panel, and then you wiggle the
covers off the relays, and clean them. It takes 10 minutes.

good luck ! Damned the manufacturers for not putting this information
in the user manual.

Robin Graves, January 2008,

Posted on Feb 01, 2008

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Re: Error code F3 on Kenmore 911.4658815 electric range

Fridgetech is right. It's the temperature sensor. I had the same problem, but I was getting the F3 and F2 errors when attempting to preheat the oven.
A R Marshall said that he replaced the sensor but he still got the same F3 error. That happened to me too! It worked for a few weeks, then it began to malfunction again. It finally started showing preheated as soon as the oven was turned on, but never heated at all. One night at 3AM, the error code and beeper went off while we were sleeping! That happened on several occasions at various times of day, and it was necessary to kill the power to stop it. The power could then be restored and the error would stop.
Ours is a Hotpoint range (made by GE). It's my understanding that most ranges have the same or similar error codes.
The sensor was $85.00 at the parts store, but I got it on line for about $60.00 including shipping. The instructions said to strip the wires and then twist them together with wire nuts. But the new sensor had a plug that fit so I used it, and it worked for a short while.
As I looked through the problems and possible solutions, someone said look for burnt wires. So I opened it up and looked but there was nothing like that. Then I remembered the instructions that said to hard wire, so I examined the plug which seemed to have one short wire inside. I plugged it back in and tested with the same negative results. Now suspecting the plug I cut off both sides, stripped the wires and hard wired using two small wire nuts. It immediatly began working normally!
Something is wrong with the plug connector.
Try cutting out the plug and hard wiring before ordering a new part. But if you need a new part, eliminate the plug!
May God bless you and keep you safe!

Posted on Jan 22, 2009

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Re: Error code F3 on Kenmore 911.4658815 electric range

Amen to hardwiring the connection first..I'm a repair tech and more times than not, that's all it takes to fix it. If that doesn't work, then look into the probe itself or the control. BUT FIRST MAKE SURE THE WIRES FROM THE PROBE TO THE CONTROL ARE IN GOOD SHAPE. A shorted wire to the chasis can give a false reading also causing this problem.

Posted on Mar 13, 2009

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Re: Error code F3 on Kenmore 911.4658815 electric range

I found myself in the same situation with an F3 error. After reading your solutions and testing on my side, I found out that it was only the upper element that blew-out (litteraly). Change it and fixed my problem. Thanks

Posted on Apr 19, 2011

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Re: Error code F3 on Kenmore 911.4658815 electric range

The oven temp. sensor has gone bad.  Replace it and that will solve your problem.  The part # is WB21X5301 and cost is $73.49.  Can purchase at  You can view the image at  It is inside the oven in the upper right or left hand corner.  Should be able to remove from the inside.  Two phillips screws and pull it out harness also.  Plug new one into harness and put screws back in and you are done.

Posted on Oct 17, 2007

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