Error mesage After it warms up the display shows please open cover and when I open the cover it displays please close cover

To me the Error is telling you Probe Error - Wash - Power - Drain

CL & CLe Series Dishwasher Display Codes Below are common codes that display on Hobart CL and Cle Series Dishwashers:

• Door(s) Open - This displays if one or both doors are open. Close all inspection doors.
• Clear Conveyor Jam - The code appears if there is a jam. Remove the rack from the machine. Then, press START and rerun the rack.
• Probe Err - TANK - Check if the lower float assembly in the displayed tank isn't visibly damaged and that the proper amount of water is covering the lower float in the tank.
• Probe Error - FnlRns - Make sure the supply water valve to the rinse booster is open.

More here and a video

https://www.google.com/search?q=Hobart+PROBE+ERROR-WASH+PW+DR

https://www.hobart.com.mx/pdf/FichaTec/F-40196.pdf

Service Manual

https://hvac-talk.com/vbb/attachment.php?s=219f76d9e796c2e5f1c5fef6b79fad9d&attachmentid=830275&d=1639784925

from here

https://hvac-talk.com/vbb/threads/2234701-Hobart-Service-Manuals

..

You may not have reset the drum counter. If multi-function machine open front hatch , press clear or options button. Display should read "change drum?" then press number 1 on keypanel. Display should read "accepted" then close hatch. If the machine is printer only locate the "go" button on the front left on top of the printer. Open the front hatch and locate the stud under where the "go" button was. Press and hold the stud until all the lights are illuminated. Relase the stud and close the hatch.

Hi there,
If the display shows drum error you can try cleaning it by following the steps below:
1. Open the front cover. 2. Pull the drum (black) and toner (gray) towards you, put a little force on it. 3. Remove the toner by holding down the tab on the side of the drum, then pull the toner out. 4. Use a dry lint-free cloth to clean the roller inside the drum unit. Make sure to remove any excess toner from it. 5. Put the toner back to the drum, make sure that it clicks, Reinstall the drum and toner back to the machine, 6. Close the cover.

If the display still shows drum error, go ahead and do the drum reset.

1. Open the front cover 2. Press the Options button on the control panel 3. The display should show "Replace Drum - 1. Yes 2. No 4. Press 1 to reset the drum count 5. Close front cover. The display should show the date & time
If still it shows drum error, The drum unit needs to be replace. After replacing the drum unit, do the drum reset again,
Hope this helps.

1. With unit powered On, open the front cover.

2. Press the "Options" key. Display will show "Replace Drum?"

3. Press "Start" key.

4. Press 1,0 .

5. Display will show "Accepted" for approximately 2 seconds. Then display will change to "Cover Open".

6. Close cover and see if Toner Life End error message has gone.

Good Luck and Thank You for using Fixya.

To reset the sensor after installing a new toner cartridge follow these steps. 1. With unit powered On, open the front cover. 2. Press the “Options” key. Display will show “Replace Drum?” 3. Press “Start” key. 4. Press 1,0 . 5. Display will show “Accepted” for approximately 2 seconds. Then display will change to “Cover Open”. 6. Close cover and see if Toner Life End error message has gone.
Try this. We are Brother authorized.

The printer displays a 'Cover open, please close cover' error message, even though the cover is closed.

This can happen if the lever on the cover open sensor is knocked off the switch assembly.

To reset the sensor after installing a new toner cartridge follow these steps.
1. With unit powered On, open the front cover.
2. Press the "Options" key. Display will show "Replace Drum?"
3. Press "Start" key.
4. Press 1,0 .
5. Display will show "Accepted" for approximately 2 seconds. Then display will change to "Cover Open".
6. Close cover and see if Toner Life End error message has gone.
Please note that this must be done with a new cartridge so the unit will see that there is toner in the cartridge.

To reset the sensor after installing a new toner cartridge follow these steps.
1. With unit powered on open the front cover.
2. Press the "Options" key. Display will show "Replace Drum?"
3. Press "Start" key.
4. Press "+" key 10 times until the display reads 10.
5. Press "SET" key.
6. Display will show "Accepted" for approximately 2 seconds. Then display will change to "Cover Open".
7. Close cover and see if Toner Life End error message has gone.

Reinstall the new drum unit, keeping the front cover open. Press OPTIONS. Press 1 when the display shows REPLACE DRUM? 1.YES 2.NO ACCEPTED. Close the front cover.

All you should have to do is: -replace the old drum with the new replacement. -with the front door open press the Clear/Back button -press the number 1 button and when ?accepted? appears on the LCD close the front cover. That should do it. Let us know if you have any other questions and please don?t forget to rate this post.