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Posted on Feb 08, 2014
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Error Code 4D21

Both upper and lower fans turn just fine. I "did" repair the de-soldered connections on the speed sensors but I still get an error code 4D21. Any suggestions?

1 Answer

RonW

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  • Expert 111 Answers
  • Posted on Feb 12, 2014
RonW
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Joined: Jan 16, 2014
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Somewhere the control is not reading fan rotation could be encoders harness or control had this error once reset oven till I could return with control error never returned replaced control anyway

3 Related Answers

Anonymous

  • 1 Answer
  • Posted on Jul 22, 2010

SOURCE: error message on JJW9530DDS Jenn-air wall oven

no/low cooling fan rotation (No RPM) single cavity or upper oven - check connection at cooling fan if ok, replace blower - DO NOT REPLACE CONTROL

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Anonymous

  • 1 Answer
  • Posted on Sep 26, 2008

SOURCE: error code F1

I had the same problem first the PRB light would come on then F! for upper then F1 for the lower and it would beep. pressing cancel cleared it for a minute then it would occure again. I pressed and held both cancels at the same time for a minute. Then went to my computer to check for solution. 1/2 hour later still no beeping.

espressonist

espressonist

  • 1711 Answers
  • Posted on Dec 26, 2010

SOURCE: After self cleaning process oven door would not

F3
or
F4
Shorted or open oven temperature sensor
(RTD) Check sensor harness and harness connection
between oven sensor and oven control. Replace oven temperature sensor (RTD) if
wiring is ok.

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1answer

My Hotpoint oven model no. SA2 540 H IX is showing error code F53. What does this mean and is this fix DIYable?

El c?digo de error F53 en un horno Hotpoint SA2 540 H IX significa que hay un problema con el motor que gira el tambor. Se requieren nuevas escobillas de carb?n o un nuevo generador de tach para reparar su horno y borrar el c?digo de error. Ambos son f?ciles de conseguir y econ?micos de reemplazar. No necesitar?s comprar un horno nuevo. Puede reemplazar las escobillas de carb?n y el tachogenerador como un proyecto de bricolaje si sigue los pasos descritos en el manual del usuario
Jan 05, 2023 • Ovens
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JENN AIR Double wall ovens both showing error code "4D21 low temp" then shuts off after I attempt to pre heat them. Model number is JJW 9630DDB

This error usually means that the cooling fan, WP74008383, is bad or can't rotate due to build up on the fan. The fan is part 20 on the control panel and internal controls diagram here: https://www.searspartsdirect.com/model/39577ix2rq-001266/jenn-air-jjw9630ddb-electric-wall-oven-parts . The direct link to the part from this supplier is https://www.searspartsdirect.com/product/63d8xvl5zg-0022-464/id-74008383 . This fan is accessed from the back of the wall oven. Thus you have to cut the power to the oven and remove it from the wall. This may be a job for a repair technician.

I hope this helps.

Cindy Wells
Aug 21, 2020 • Ovens Ovens
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New electric double oven with error code F97.

Turned on lower oven self clean for about 5 minutes

Prayed and asked Jesus to please let it work.


Turned of the self clean and then tried the oven and the error code f97 was gone and the oven works again.

Thank you Jesus
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F43 error on Frigidaire Wall Ovn?

The code F43 means - The cooling fan speed, as read by the tachometer input of the EOC-display board, is abnormally too slow. when the cooker is on can you feel the fan is on through the upper vent? If not then the fan is the problem if you can then the fan sensor is the problem!
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Oven shuts off with Error Code 4d21

This problem points to the controller card not functioning properly. It will need to be replaced. Here is a link so you can get the owner's manual:
http://www.manualslib.com/products/Jade-Range-Rjdo3003a-2904090.html

Check it out, it may help you figure it out.
3helpful
1answer

Error message on JJW9530DDS Jenn-air wall oven is 4d21

no/low cooling fan rotation (No RPM) single cavity or upper oven - check connection at cooling fan if ok, replace blower - DO NOT REPLACE CONTROL
0helpful
1answer

How to start oven in PROPANE STOVE

Print the following infore for future ref if you wish. How it works is simple tage a look at it in Motion
Component Test Procedure Results
Electronic
range control
F1−1 –Upper Oven >650°F with door unlocked.............................
F1−2 –Lower Oven >650°F with door unlocked.............................
F1−3 –Upper Oven >950°F with door locked.................................
F1−4 –Lower Oven >950°F with door locked.................................
F1−7 –Membrane switch is not responding ...................................
F3−1 –Upper sensor is shorted at (< 100 ω) or
open at (>5 K ω) ...............................................................
F3−2 –Lower sensor is shorted at (< 100 ω) or
open at (>5 K ω) ...............................................................
Check actual upper oven temperature,
if > 650°F check sensor.
Check actual lower oven temperature,
if > 650°F check sensor.
Check actual upper oven temperature,
if > 950°F check sensor.
Check actual lower oven temperature,
if > 950°F check sensor.
Check membrane switch for connection or damage.
Check upper sensor, harness, and connections
Check upper sensor, harness, and connections
Engineering
Test Mode
Press BAKE pad.
Enter 100°F using the number pads.
Immediately push and hold BAKE pad for appropriate oven
approximately 3 seconds.
This mode can also be entered by pressing the hidden pad
for 3 second located to the left of the lower oven light pad.
Used to view the actual oven temperature for both ovens at all
times, even when an oven function is active.
This mode will also display the current fault code for 5
seconds in the time digits.
Fault codes
accessed
through
Engineering
Test Mode
F0−0 –No fault .................................................................
F1−5 –Upper hardware failure within control ....................
F1−6 –Lower hardware failure within control.....................
F1−8 –Shorted key in membrane switch ..........................
F1−9 –Internal communication errors within control .........
F1−A –Upper latch switches ............................................
F1−B –Lower latch switches.............................................
F1−C –Upper door switch.................................................
F1−D –Lower door switch.................................................
F1−E –Sensor input not calibrated ...................................
F1−H –EEPROM error .....................................................
F1−L –Temp in ovens are the same for long period .........
F1−N –Internal voltage on control not working .................
F9−1 –Upper lock switch is not correct.............................
F9−2 –Upper unlock switch is not correct.........................
F9−3 –Control does not see upper door lock....................
F9−4 –Lower lock switch is not correct.............................
F9−5 –Lower unlock switch is not correct.........................
F9−6 – Control does not see lower door lock ...................
EE –Control cannot read E-PROM. Unit will shut down.
Default from factory
Replace control
Replace control
Check membrane connection
Replace control
Check latch wire harness
Check latch wire harness
Check lock wire harness
Check lock wire harness
Verify sensor is operating properly
Replace control
Verify sensor is operating properly
Replace control
Check lock wire harness, and lock switch
Check lock wire harness, and lock switch
Check lock wire harness, and lock switch
Check lock wire harness, and lock switch
Check lock wire harness, and lock switch
Check lock wire harness, and lock switch
Disconnect power for 60 seconds. If EE reappears, replace ERC
Test Mode This mode must be activated within the first 5 minutes of
power up.
Press BROIL and CANCEL pad for approximately 3 seconds.
If oven temperature is greater than 400°F, the Test Mode
cannot be activated or will abort if active.
Press and hold individual pads for 4 seconds to activate.
Display will have dashes in all segments to indicate the mode is
active.
Upper Bake: Energizes upper bake element
Lower Bake: Energizes lower bake element
Upper Broil: Energizes upper broil element
Convection Bake: Energizes convection fan
Upper Oven Light: Energizes upper oven light
Lower Oven Light: Energizes lower oven light
Upper Clean: Energizes upper motorized door lock
Lower Clean: Energizes lower motorized door lock
Stop Time: Energizes Beeper
Cook Time: Displays error codes
Timer 1: Energizes ROM version
Timer 2: Energizes EEPROM version
Keep Warm: Cooling Fan
Clock: All display segments light
If functions do not perform as specified, replace ERC
Oven
temperature
adjustment
Push BAKE pad.
Enter 550°F using the number pads.
Immediately push and hold BAKE pad for appropriate oven
approximately 3 seconds.
To decrease or increase oven temperature. Push AUTO SET
pad until negative or positive numbers appear. Oven can be
adjusted from -35° to +35° (-37.2° to + 1.6° C) in 5° F (2.7° C).
To avoid over adjusting oven move temperature -5° each time.
Push OVEN CANCEL button.

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