Will not run - display 'door open' even though it is closed.

Sometimes Door open error shows in printer even if it is closed .

Follow This steps to Fix Open Door Error Message:-

*Close the cartridge access door completely.
*Check the cartridge door for obstruction.
*Reset the Printer
*Restart the Print Spool Device.
*Restart the computer.Restart the Printer.And If you are using Brother Printer And You Encounter With Brother Printer In Error State Windows 10 Issue then Read The Blog I Am Mentioning above.

Could be just a faulty switch that is broken in the open position, even though the door is closed.

It sounds like your door latch got tripped into the closed position (even though your door is open). You MIGHT be able to use a screwdriver or some tool to be able to pull the latch lever back out to the open position, but it might also be necessary to take the door apart to get to the latch to be able to reset it. The real problem is that if it happened before, it will probably happen again. So the real solution is to replace the latch assembly.

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try to uninstall and reinstall the program files see if that fixes it

It could be the door is coming open just enough to trigger the switch to the off position. Even though the door looks closed it could be partially open. Most likely the clips that hold the door shut are not tight enough that when the clothes hit the door it pops open a little bit. These clips are basically springs and over time they loosen up.

one of the door switches has failed and the BCM is still seeing there is a door open.

first check all connections on circuit board are tight if ok change interlock,if problem still persists you have a circuit board fault which could have been caused by blown interlock

Hi from retired Englishman in SW France,

The symbol indicates there is a problem with the door lock. Either the locking solenoid or the door lock sensor is malfunctioning and requires attention. Sorry- Service call!
John C

Loosen the chain enough that you can remove it from the sprocket. Run the opener until the sprocket turns counterclockwise and stops. With the door in the open position replace the chain. You will probably need to adjust your open and close limits per your owners manual.

You have a problem with the door alignment and the door switch.. The slightest movement triggers the door switch. You should have someone look at what is causing this issue.

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