The door of the Haier drum washing machine may not open due to the following reasons:
1. Safety lock protection function: when the washing machine is working, the door cannot be opened, which is a safety protection device to prevent the human body from being injured by opening the washing machine door by mistake. When the washing machine is finished, the door will open naturally.
2. PTC heating element damage: There is generally a PTC heating element inside the drum washing machine, when the washing machine is working, the PTC heating component will heat up, causing the metal sheet on the washing machine door to heat up and bend, thereby locking the washing machine door. When the PTC components of the washing machine are damaged, the washing machine door cannot work normally, and the PTC heating components are not restored to their original position when the washing machine is turned off, and the washing machine door cannot be opened, and the plastic needs to be slightly reset by hand knocking.
3. Electronic devices crash for a short time: the washing machine door can not be opened, the washing machine can not work normally, but sometimes the washing machine returns to normal, this kind of occasional washing machine failure, generally the electronic components have a short crash, can only turn off the power, and later let the residual electricity in the circuit be discharged, so that the electrons can return to their original position.
If none of the above methods can solve the problem, it is recommended to contact Haier's after-sales service center or professional maintenance personnel for help.