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Frigidaire-electrolux Slide in Range,#PLES389ECD


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7 replies to this topic

#1 Konanthebarb

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Posted 16 July 2013 - 02:14 AM

I haven't done one of these in a while and can use some help. It's giving an F-90 code when pressing bake or broil and nothing works. Shut off breakers and turned back on and got" Loc error" message. Light & timer function works, press bake and broil again and nothing works. Clear panel and get F-90 code again. Top surface elements not a problem, only oven.

 

F-90 code: Maximum oven door unlock time exceeded.

 

                  Check wiring between EOC and lock motor micro-switch.

                  Possible motor door latch assembly.

                  Check for binding of the latch cam, lock motor rod and lock motor cam.

                  Lock motor coil open, replace lock motor assembly.

                  If lock motor continuously runs,-if micro switch is open, replace lock motor assembly.

 

If I'm not mistaken, isn't the door latch, micro-switch and lock motor comes in an assembly..?

The customer  claims they haven't used the self cleaning!

Any suggestions greatly appreciated.

 



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#2 DurhamAppliance

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Posted 16 July 2013 - 07:13 AM

Here is some info that may help



When an oven with an electronic control fails, it usually signals the failure with an “F” code. These “F” codes are considered by many people to be an indicator as to positively which part in the circuit has failed (“F1” a defective control, “F3” a defective oven probe, and so on). To the embarrassment of many servicemen who have believed this, they have installed the indicated part only to find it did not correct the problem. To troubleshoot an oven with an electronic oven control that is not operating:
1. Make sure electrical power is being supply to the control.

2. Disconnect power for 30 seconds. If fault returns when power is reconnected continue with the following steps.

3. Go to the back of the control and disconnect the multi-pin plug.

4 Check the wiring diagram to determine which two pins in the plug (not on the EOC) are connected to the oven sensor.

5. With an Ohmmeter check the resistance between the two pins in the plug that are connected to the sensor. At room temperature:

STEP 1: If the meter reads below 900 Ohms or above 1200 Ohms, remove the sensor from the oven and check it for resistance. If the resistance of the sensor is the same as reading at the plug, the sensor is defective. If the resistance of the sensor reads between 900 & 1200, the wiring between the control and the sensor is defective.

STEP 2: If the meter reads between 900 Ohms & 1200 Ohms check the resistance between one of the pins going to the sensor and chassis. If the meter reads infinity go to step 3. If the meter shows continuity, remove the sensor and check from one of its pins to the case of the sensor. If the meter reads continuity, the sensor is defective. If the meter reads infinity, the wiring between the control and the sensor is shorted to chassis of the range.

STEP 3: From the wiring diagram, determine which 3 wires if automatic lock or which 2 wires if manual lock, in the plug is from the door lock switch or switches. From the diagram determine which of the switches are open or closed when the door in the unlocked position. With an Ohmmeter check to see if the switch that is shown open is open and the switch that is shown closed is closed by checking the proper pins in the plug.


6. If the above checks test good and the relay on the board for the selected function is not closing replace the control.

IMPORTANT: If the oven problem is intermittent you must do the above test when the oven is malfunctioning.

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#3 RegUS_PatOff

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Posted 16 July 2013 - 08:06 AM

... F-90 code: Maximum oven door unlock time exceeded.
... isn't the door latch, micro-switch and lock motor comes in an assembly..?
... The customer  claims they haven't used the self cleaning!

  :whistling:

 
parts
wiring
http://appliantology...nge-ples389ecd/
 
service manual
http://appliantology...tanding-ranges/

 

http://www.repaircli...R=154&N=1614388

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#4 DurhamAppliance

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Posted 16 July 2013 - 12:38 PM

1)Yeah, but give a man a fish... etc
2) Always test stove sensors first and
3) boards are lying pieces of crap


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#5 Konanthebarb

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Posted 17 July 2013 - 02:10 AM

Ok, very good. The sensor is not playing a part on this, the sensor checked out fine. whenever
the sensor goes out i find the f-code for the faulty sensor to be correct, after all it's only the sensor. easy to read & diagnose that, it's cut and dry. If in doubt just put a new one in in, pretty cheap and fast.But good breakdown work on that for sure.thanks! The lock motor latch appears to be one piece from the picture from RegUS. Usually the lock/latch motor error code plays a part in this scheme when it shows up as "loc error". Possibly from use of the self cleaning function, although they said they haven't used it.

#6 Konanthebarb

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Posted 17 July 2013 - 02:32 AM

I haven't checked the lock/latch motor and micro switch yet so I'll check that out. What I have seen with other models is the control board overheating, when self cleaning the oven, then the latch/motor locks up when the control goes down, giving the "loc error" code or "maximum unlock door time exceeded". This is possibly why the F-90 coded and then "loc error' coded after resetting the breakers. It seems to have the same design function as Whirlpools and others where the cooling fan blows straight over the control board. again bad designs. I may be over thinking this one.

#7 DurhamAppliance

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Posted 17 July 2013 - 06:48 AM

The info I provided comes from electrolux training material. You are correct in that the sensor is inexpensive and easy to test. That's the point. Boards do not always interpret a faulty sensor nor a faulty thermal fuse the correct way. It can result in misleading error codes. It has happened to me on several occasions.

Odds suggests it is the locking mechanism. But since the sensor is cheap and very easy to test, it's worth it to prevent the highly embarrassing egg-on-face feeling after installing an expensive yet uneeded part. All you can say to the customer is "but the board said it was a (fill in the blank) error." After this, you will gladly join me in proclaiming, "boards are lying pieces of crap." So even at 50-1, I'd personally rather not tempt fate.

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#8 Konanthebarb

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Posted 17 July 2013 - 07:48 PM

No, I've already agreed with you Durham regarding the boards. It is finnicky and deceiving and can sometimes portray the wrong error message. This is why

this error message may have muiltiple agendas. I will look into the lock/latch assembly first which is probably why the" loc error" code is coming up after resetting the stove, although F-90 keeps coming back afterwards. This is almost a trial by error judgement call, if you ask me. but by going with the latch/lock motor assembly which is due to the F-90 coding and "loc error" mssg. sounds a more realistic part to change out first. Thanks for the good advise and keeping me grounded, and I appreciate your suggestions.






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