Inspect the door and lock for any obvious problems, which could include dust or debris. Also, keep an eye out for wear or damage to the main parts of the door and hinges. Check the alignment of the magnetic lock to ensure everything is aligned properly. Check for oil residue.
Misalignment of the Lock
Another common problem with maglocks is misalignment, which can cause the lock to bind or not release properly. This can be caused by a poorly installed door frame, a misaligned strike plate, or a warped door.
Common “failure to release” problems are associated with the power source, and the common “failure to lock: problems are associated with the door, including poorly hung door, the door frame getting warped, twisted or bowed, worn out tears and hinges or improperly installed door closers.
The easist way to keep a magnet from sticking to other stuff is to keep it away from the other stuff. The forces of attraction and repulsion get very small far away from the magnet. You can also redirect the magnetic flux lines into a loop to reduce the field strength away from the magnet.
To re-magnetize a weak magnet, you can use a permanent magnet or an electromagnet. Hold the weakened magnet close to the stronger magnet and slowly move it along the length, ensuring the poles are properly aligned. Repeat this process several times to reinforce the magnetic strength of the weak magnet.
Magnetic fire door retainers have a wall or floor mounted electro-magnet that can hold a metal disc fitted to the back of the fire door to hold it open. Once an alarm activates, the fire doors are automatically released. There is a manual release button to override the system to release the door.
The magnetic lock opens automatically without power.
Most gift cards and credit cards have magnetic stripes. Once these stripes are destroyed or de-magnetized there is no way to re-magnetize them.
While magnets do experience changes over time, they don't exactly "wear out" in the traditional sense.
Magnetic Field Interference Causes Magnet Issues
Magnetic fields from external sources can interfere with the magnetization of a material, causing it to become demagnetized. This can occur when magnets are exposed to strong electromagnetic fields or placed in close proximity to other magnets.
Magnetic plate locks typically offer 500 to 2,000 pounds of holding force (for our international audience, that's between 2 and 8 kN). If you can apply a greater force to the magnetic locking mechanism, you should be able to open the door.
There are several reasons a door may stick in the doorframe, including loose hardware, a sagging frame, or seized hinges. Humidity is another common cause of sticking doors: The high moisture level in the air can seep into the wood, resulting in a swollen door that does not open or close properly.
It's Common Problems
Magnetic door locks involve multiple components, making them susceptible to various issues. These locks can either fail to engage properly or fail to release, both of which require prompt attention.
A holding force of 650 lbs. (Figure 1) is typical for most magnetic locks fit for traffic control and they may be easily defeated. However, this is a benefit compared to the use of light duty electric strikes.
In conclusion, NO, if you wedge open a fire door you will create a dangerous situation. Uncontrolled fire could lead to property damage or even loss of life. Temporarily, you can in certain situations BUT it must be removed immediately after use.
If you can find a very strong magnet, repeatedly rub it across your weakened magnet. The strong magnet will realign the magnetic domains inside the weakened magnet [source: Luminaltech]. Magnet stacking One way to make weak magnets stronger is by stacking more of them together.
Additionally, magnets can gradually lose their strength through a process called demagnetisation, where the magnetic domains revert to a more random orientation. This can occur through exposure to strong opposing magnetic fields or by repeated use in certain applications.
Magnets can lose their magnetic charge to temperature variations. Temperature extremes can either cause temporary or permanent losses. When heat is applied to magnets, they may temporarily lose strength but regain this force after being cooled down to their optimal operating temperatures.
Repulsion of magnets
Two equal magnetic poles, such as north and north or south and south, will repel each other as the one magnet disturbs the parallel alignment of the molecular magnets in the other magnet, therefore rendering both magnets a little weaker.