Question about Jenn-Air Ovens

8 Answers

I have a Jenn-Air JMW8530 wall oven which is misbehaving as follows. After using the oven, the cooling fan continues to run for a few minutes. This is normal. The cooling fan shuts off, then after 10 min or so it comes back on with a single beep. 30 seconds after that there is a triple beep, 30 seconds later it displays F7 and starts continuous beeping. Some 10-15 minutes later the fan shuts off and at that time the beeping and F7 display can be terminated by pressing the "cancel" pad.I have swapped the control/clock board with one that has a failed display illumination and the behavior does not change so I suspect a component other than the control board. The behavior has been triggered once or twice by power fluctuation and can happen during oven operation for long periods at high temperatures.

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  • honeyman57 Jul 20, 2009

    This (stuck key) is what I first suspected. However, the fact that the
    cooling fan comes on before the F7 is displayed, and that the F7 can be
    cleared with a "cancel" after the fan shuts off, makes me want to find
    a more specific explanation involving the fan before I replace the keypad.

  • honeyman57 Jul 20, 2009

    Stuck key is what I first suspected. However, the fact that the cooling fan comes on before the F7 is displayed, and that the F7 can be cleared with a "cancel" after the fan shuts off, makes me want to find a more specific explanation involving the fan before I just replace the keypad.

  • honeyman57 Jul 21, 2009

    I had no intention of "voting you down", I'm new on this service and don't know about the voting. Sorry for that mistake. This is not a convection model, and the fan in question is the cooling fan and there is no button/key that controls it. I can, and have, pulled the ribbon connector for long periods, and yes the problem does not reappear upon reconnecting. However the problem also goes away just by waiting until the cooling fan stops. If someone is around that simply can not tolerate the beeping, I pull the power to the control board. The fan will continue to run for some minutes. When it stops, I reapply power to the control board. The fan usually cycles on then immediately off. F7 is displayed, but can be cleared via the "cancel" button/pad. If I finally replace the entire control panel and the problem goes away I will certainly mark your solution as "accepted." You are correct about me not wanting to spend a couple of hundred bucks to find out that the problem is in the oven sensor circuits/logic. I was hoping someone would know that there are other conditions that might be interpreted by the logic as a stuck key or could explain the cooling fan's involvement. If there is a way I can "un-vote you down" please let me know.

  • honeyman57 Jul 21, 2009

    I have the Service Manual and understand that F7 means a stuck key. I have two clock/control boards that yield the same behavior so I'm not considering the control board as the culprit, but I also know enough not to rule out anything permanently. If someone can explain how an actual stuck key could involve the cooling fan in this behavior, I might feel better about spending a couple of hundred bucks on a new control panel.

  • honeyman57 Jul 23, 2009

    Having received no additional comments in 3 days from the two initial responders, I'm attempting to expose my problem to additional viewers.

  • honeyman57 Jul 24, 2009

    OK, assuming probe is failing (resistance going high) or probe circuit is opening causing cooling fan to run, why would that cause an F7 to display?

  • honeyman57 Sep 09, 2009

    I have the service manual so there's no need to repeat what it says about the F7 error code. In addition to the behavior described in the original post, the cooling fan will come on for no apparent reason after several days of normal behavior. I'm looking for an explanation of the interaction between the fan and the detection of a "stuck key". And why does it go away after the fan runs for about 12 minutes.

  • honeyman57 Sep 10, 2009

    See September 9 comment...

  • honeyman57 Sep 21, 2009

    Regarding "Sometimes there is no why..."(Sep 10th). There is always a "why", we just may not have enough data or knowledge of the system to determine it.

    Regarding Sep. 13 - I don't think failure to heat or problem with the heating element was ever mentioned. The oven works perfectly until (and if)control is disabled by the error code and running cooling fan.

    Guess there isn't any solution available here...

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The sensor is out on the oven. This happened to my oven (different brand) but after replacing the sensor, all error messages stopped.

http://www.repairclinic.com/0078.asp#JennAir

Posted on Sep 21, 2009

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I believe the control panel board itself may be faulty.
You can get manual and parts at repairclinic.com
You can watch howstuffworks and youtube videos on how to test and replace this device and the manual is also extremely helpful. Any questions, feel free to ask.
F7 Function key shorted or stuck button Replace touch pad or clock assembly (also called the ERC) or attempt to un-stick button
F7 Shorted key sensed for 32 seconds 1. Membrane shorted, or,
2.
Display board defective

Posted on Sep 10, 2009

  • Nate Stansfield
    Nate Stansfield Sep 13, 2009

    Most times it is easy to see a failed oven element. Their will be a
    hole or a welded mark somewhere on the element where a piece of cheese
    fell on it and caused a hotspot. You can also check elements with a
    meter or simply apply some wall current to them using a cheater cord to
    see if it gets warm. If the element gets warm that means it will work
    and is not bad. If the element ain't coming on but you have checked it
    out, of course then that would be the thermostat.

    HEADS UP: When fooling with the stove always be sure the power is off.
    Pull out the bottom drawer and most of the time you can unplug the
    power cord without moving the stove.

    To make it easier to work on most stoves the oven door can be removed.
    I set the door at the broil position and gently ease up on the door,
    remove it, and set it to the side. As far as the oven thermostat goes,
    they are simple enough to replace but quite expensive. I suggest if you
    have an electronic oven control then that old extended warranty plan is
    a winner.

    Heads Up: One thing you want to remember about fancy electronic
    controls, never put the stove on self clean! The temperature will cause
    the delicate electronics to fail. I don't care what anyone says. That
    stove will get to 900 degrees and adversely affect those controls.

    I would check is the main power source. I have been called to a home
    with a similar problem and it turns out that one of the fuses for the
    240volt oven was blown half of the oven worked but not the other. I am
    not sure if you have fuses or breakers but if you do have fuses pull
    the fuse holder out of the box and check for continuity on both fuses
    from one end of the fuse to the other if it does not have continuity
    then the fuse is bad. If you have breakers carefully remove the panel
    cover and check to see that you have 240 volts between the two wires
    for the oven. Of course you would have to have an electrical meter to
    attempt this.


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Temp. sensor is malfunctioning it may need to be taken away from the wall to replace the temp. sensor probe.

Posted on Jul 23, 2009

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The F7 error represents that a function key is shorted on the touch pad control. Replace the touch pad

Posted on Sep 09, 2009

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Hi buddy on my oven this is natural after about 20 mins it turns off the fan will run because it is circulating the hot air inside u ntil it cools down but will stay running if you turn it on and off quickly this is natural buddy

Posted on Sep 08, 2009

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F7 is touchpad sticking Error Code.

Determine if problem is with the Key Panel or Control by:
1. Pushing CLEAR/OFF pad.
2. Disconnecting Ribbon Cable from control and waiting at least 32 seconds to see if Code recurs

If code recurs, problem is in the control. Replace control. (also called clock or ERC assembly)

If code does not recur, problem is with the Key Panel

Sometimes pulling the ribbon and cleaning the contacts with a pink eraser will get rid of this error without replacing a part.

Give it a try!!

Posted on Jul 24, 2009

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This is a direct quote from the Jenn-Air repair manual:

F7 Function key shorted or stuck button Replace touch pad or clock assembly (also called the ERC) or attempt to un-stick button

Per their instructions you are looking at replacing the touch pad or ERC if you cannot un-stick the key. Hopefully this will help.

Posted on Jul 20, 2009

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Hello the error code f7 is related to the touch pad. basically there is a button in the touch pad that has shorted. To confirm this when in f7 error switch power off remove the touchpad ribbon/wiring harness from the EOC (Electronic oven control) switch power back on and leave for 24 hours. you should see that the f7 does not come back this will confirm the touchpad is bad. Once you have confirmed it is the touchpad replace it and you should be all set. Good Luck!! please feel free to comment again should you have any further questions or concerns. Mike

Posted on Jul 20, 2009

  • Mike Price
    Mike Price Jul 20, 2009

    Hello I'm sorry you voted me down before giving me a chance to respond. I stick by my diagnosis from before, The fan may be running because the convect if you have it is the button shorting (a button is shorting on touch pad). If like I said you pull the ribbon from the eoc and leave for 24 hours or even 12 if the f7 does not come back replace the touchpad. I know you are looking to get this nailed before you spend money on parts but I have been doing this for 20 years and have come across this kind of problem quite a few times. If i were at your house now i'd test it as stated before and replace it. Touchpad IS going to resolve this problem. Thanks Mike...If you have any other questions please feel free and give me a chance to respond :)

  • Mike Price
    Mike Price Sep 10, 2009

    Have you even tried changing the touch pad? some times there is no explanation for quirky things happening. I have been in the business for 25 years now and had I walked into your place with your oven showing f7 i would have replaced the touch-pad and you would be up and running...Some times there is no why...The con-census is the same from the experts and the not so expert. A piece of advice would be not to worry about the why..replace the touch-pad or pay for a professional to do it. Good Luck! Mike

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