Question about Stoves 720EF Electric Double Oven

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720 EF Fan oven fan making a scrreching noise now

720 EF Fan oven fan started making a scrreching noise now oven not heating to correct temperature when cooking

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It could be that cooking residue has run down the inside of the fan cover and it is restricting the fan movement. The fan cover is held on by four self tapping screws, one on each corner. Remove the cover and have a look to see if there are any rub marks on the inside. You should be able to remove some of the gunge by soaking the the whole cover in hot soapy water. If that doesn't work, buy the Lakeland brush on oven cleaner - that definitely works - you can use it on all of the inside of the oven. Whilst the cover is off, briefly turn the oven on to see if the fan still makes the same noise. If it does, it looks like the fan bearings are suspect and a new fan may be required. If not you have found the problem with the cover. Page 37 of the Handbook tells you how to replace the circulating fan.

Posted on Oct 03, 2009

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I have a New World Double oven, dual fuel range cooker - NW 90DFD0 The main oven isn't heating up.


Hello Ally;

My name is Peter. I am a retired field service appliance technician.

You may not have a problem. Normally your oven will rise about 40 degrees F. above the set temperature and then shut down, until the oven temperature falls 40 degrees F. below the set temperature, then the oven turns back on.

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There is a cooling fan In a STOVES 720 to keep the fabric of the oven cool. If this fails the overheat thermostats will cut in and shut the heating elements off. The cooling fan does in fact blow air out of various places in and around the doors. The top oven has a small element and takes a long time to warm up. If you are not confident that the thermostats are working correctly, then I suggest you purchase an oven thermometer from someone like Lakeland and see how that relate to what you are actually setting on the cooker dial. As I said the top oven leave a lot to be desired!

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While baking oven starts broiling with no input from controller. f2 is displayed on screen


Hello there:
F2
Note: Also see fan thermal switches Indicates that oven is over temperature in one of the following modes within either a cooking or clean mode of operation.
· Control senses oven temperature above 650 degrees F with the door circuit in the unlock mode.
· Control senses oven temperature above 935 degrees F with the door in the locked mode.
· Stalled cooling fan or airflow problem. · Look for welded relay contacts. (Heating elements on in off mode).
· Look for open thermal switch in lock motor circuit. Switch is normally closed and will open if area overheats due to fan not operating. Look for cause - fan thermal switch not closing, fan stalled, etc.
· Look for high resistance in the oven temperature sensor circuit due to high contact resistance (poor terminal crimp, deformed terminals, loose connection) or intermittent solder joint on control or intermittent oven temperature sensor.
· Look for electrical noise interference in the oven temperature sensor circuit (Ham radio, cordless phone, etc.).

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The oven temperature isn't correct. Ovenw Won't heat up.


has the oven got a fan on it. if so then maybe fan is faulty.
if convection oven then maybe one of elements is faulty
or the thermostat is a problem
regards
richard saupe
Appliance repairman colchester

appliance repairman

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1 Answer

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F2 Oven temp exceeds 590 w/ unlocked door High resistance or interference in oven temperature sensor. Replace oven temperature sensor F2
Note: Also see fan thermal switches Indicates that oven is over temperature in one of the following modes within either a cooking or clean mode of operation.
· Control senses oven temperature above 650 degrees F with the door circuit in the unlock mode.
· Control senses oven temperature above 935 degrees F with the door in the locked mode.
· Stalled cooling fan or airflow problem. · Look for welded relay contacts. (Heating elements on in off mode).
· Look for open thermal switch in lock motor circuit. Switch is normally closed and will open if area overheats due to fan not operating. Look for cause - fan thermal switch not closing, fan stalled, etc.
· Look for high resistance in the oven temperature sensor circuit due to high contact resistance (poor terminal crimp, deformed terminals, loose connection) or intermittent solder joint on control or intermittent oven temperature sensor.
· Look for electrical noise interference in the oven temperature sensor circuit (Ham radio, cordless phone, etc.).

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If the oven fan is working o/k, thenyou need to replace the fan oven element.
Please rate my solution.
Thanks.

Sep 16, 2009 | Ovens

1 Answer

Nef B1432 (2000) not heating up properly


You possibly need to fit a new fan motor, as this will certainly cause temp variations, if it is not working properly.
If you remove the inner rear cover of bottom oven, you will see the element and the fan.Try spinning the fan by hand, it should revolve freely, and rotate on its own after spinning it by hand.
If it does not, then it needs replacing.
It is a fairly straight forward job to replace, just bear in mind that the fan is held on by a left handed nut, so to undo it , hold the fan blade, and unscrew the nut clockwise, as though you were tightening it up, and vice versa to tighten it.

You will have to remove the main rear cover of oven to access the the terminals and the fan motor.

Please rate my fixya soution.
Thanks.

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Cooking is determined by 3 things so let's look at what they are and what they do.

They are:

  1. The Fan Oven Element - This is very much the same as a light bulb only instead of giving off light it gives off heat. Like a light that is switched On or Off by a wall switch, the Element is switched On or Off by a Thermostat according to the temperature required. In short if the element fails your oven will be cold.
  2. The Fan & Motor - This sucks the air in through the centre mesh and circulates it around the Element and pushes the heated air out of the top, bottom and sides of the back-plate. Fan ovens cannot heat properly if the fan is not running OR if the fan runs too slowly as the motor starts to fail.
  3. The Thermostat. - This is basically an On/Off Switch that responds to the temperature in the oven. If The Fan is running correctly and you are achieving some temperature in the oven, then the fault will be with the Thermostat.
I hope this Helps - Terry

ALWAYS ISOLATE THE POWER SUPPLY BEFORE WORKING ON THEI APPLIANCE!

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