There are two main reasons: 1, the power switch has been used for too long, resulting in poor contact. At this time, the switch should be directly short-circuited, connected with thin copper wire, and then replaced with a socket. 2. The heating wire in the electric mattress is broken, and the broken heating wire should be replaced with a new one.

Second, what are the precautions when using the electric mattress?

1, before use, be sure to read the product manual carefully and operate in strict accordance with the operation steps introduced in the manual. At the same time, you need to know the relevant precautions introduced in the manual to avoid problems in use.

In order to ensure the normal use of the electric mattress, you should also take a closer look at the voltage and frequency of the product indicated in the manual, and then compare it with your own voltage and frequency to see if it is the same. Generally speaking, the two need to be consistent. If it is inconsistent, the electric mattress will not work normally.

3. In the process of using the electric mattress, be sure to keep the electric mattress stretched naturally and never fold it. If the electric mattress is found to be folded or piled up during use, it must be spread flat before continuing to use, so as to avoid safety accidents.

4. If it is the first time to use the electric mattress, or if it has not been used for a long time, the electric mattress should be turned on for half an hour, and at the same time, someone must supervise it on the spot to determine whether it can be used safely. When using the electric mattress, we must pay attention to moisture protection, especially to prevent children from accidentally urinating on the bed, otherwise it will easily lead to short circuit of the electric mattress, and in serious cases, it may also lead to fire.