Oven sometimes works ok other times takes twice as long to cook . Think it may be thermostat .I have no experience of repairing ovens Is it difficult to change thermostat

You may have a stuck thermostat and that should be replaced because he's probably telling the other keep eating even though the temperature the temperature would be correct

think your new oven is too hot or too hot or too cold, you can adjust the temperature yourself to meet your specific cooking preference. You can also adjust your thermostat if your oven is not new, since thermostats may "drift" from the factory setting over time. See the "Adjust the Oven Thermostat"

I have a Superba built-in YKEBS 177 D56 ( dual convection/convention)...I think it might be about 10 years old. I noticed the same thing starting last year..the temperature seems a litlle off and the cook time on the convention seems to take longer. I've never used the conventional oven so I don't know if the temperature is OK on that component.
I don't have a manual. and I've been searching for it...does anyone know which one I need?
Sorry I couldn't help with your problem, mine is similar to your though!!

Most likely a faulty thermostat. Contact a qualified service representative for service.

Hi

It's not too difficult to change the thermostat but it will depend on which model you have.

Try this useful link; www.wonderhowto.com/how-to-replace-cooker-thermostat-oven-250012/

It could be that the overheat thermostat is kicking in, albeit earlier than it should do. Have you checked to see that the oven thermostat is working correctly and is not heating the oven up too much ( does the neon go off and on) and is the oven cooling fan running ok in the background. If these two appear to be ok, then you may need to replace the overheat thermostat.
(The oven cooling fan should remain on for about 5 to 10 mins after either oven or grill has been used. If this isn't happening or it is not running correctly then that is why the overheat device is shutting the oven off). As a thought, are the top oven and grill working ok? if they are, then it narrows it down to either the oven thermostat or the overheat sensor.

We had this problem; Your thermostat is probably broken. To test this theory, buy an oven thermometer and test how accurate the oven is. My bet is you will find this to be off. Fix it now, otherwise, it might lead to other issues.

the only thing that will do that is a wonky oven thermostat. replace it

Set the oven thermostat to 100 degrees ( very low heat) and wait to see if the onen indicator goes off. If it doesn't then the oven thermostat may be faulty. If you have an oven thermometer, then use that to check the oven temperature.

if its flashing auto.
Press and hold the 2 buttons on the left hand - clock and cook time and then press the + button.
This then sets the time to allow manual and takes the auto off.

cheers

will

WB, Your thermostat is shot and must be replaced. The most difficult part of this job is locating one to replace it with. Have the complete Model and Serial number handy... First, try locally. Call a local Commercial Kitchen repair/parts house. Surely theres one nearby, they work on all McDonalds, Wendy's, Restaraunts, etc... cooking equipment. Second, contact the manufacturer; Star Manufacturing International, Inc. 10 Sunnen Drive St. Louis, MO 63143-3800 Phone (314) 781-2777 (800) 264-7827 Fax (800) 264-6666 After you have it, SHUT OFF THE POWER AT THE BREAKER!!! Now try to turn the unit on to VERIFY you have no power. Then remove the t'stat knob. Now remove the screws holding the control panel in place. Tilt the control panel out toward you. Now you can see the t'stat and see how the sensor bulb is routed. (HINT: Take a piece of paper and draw the back side of the t'stat's wire connection locations and wire colors/numbers, BEFORE removing anything.) Remove the wires and the t'stat and route/wire the new one the same way. Another tip; Be extremely careful with the sensor bulbs capillary tube (the small tube connecting the bulb to the t'stat). NO 90 DEGREE BENDS ALLOWED! It is a hollow tube, if it's piched/kinked you can throw it in the trash and buy yourself a new one. (It came packaged as a coil for a reason) As you uncoil it, go slow and easy.