Fan Thermofuse: Functions – Signs of Damage and How to Fix It

Thermofuse is an electrical component found in the fan. The thermofuse has a function for safety in case of overheating of the fan itself, so that other components are not burned and the damage is not so severe.

Fan Thermofuse Function

There are thermofuses that have a box-like shape and some are round like a tube. For a thermofuse that has a box-like shape, there are two wires at the bottom. As for the round thermofuse, there are wires at the top and bottom.

Fan Thermofuse

The way the thermofuse works is related to the writing on the body. If on the body it says 100 degrees 2 A. Then this can be interpreted as a broken thermofuse if a current higher than 2 amperes is passed, or heat that exceeds 100 degrees. The following is an explanation of the function of the thermofuse on the fan:

  • Current Safety

The first function of the thermofuse is as a current safety. The way it works is to cut off the current if it is more than the required heat in an electronic device, such as a fan.

This is so that the fan is at the maximum current it can receive, because if it is excessive it will cause the fan to be damaged.

  • Solve the Overheating Problem

The second function is to overcome excessive heat in the fan, any type of electronic device if used for too long will cause heat in the engine and spread to all parts.

Here the thermofuse has a role to overcome excess heat, so that the heat possessed by electronic devices such as fans remains stable.

  • Protect the Other Components from Burning

The third function of the thermofuse is to keep other components of the fan from burning. Other components can catch fire if the heat flow exceeds its capacity.

If it burns, the component can be said to be damaged and the fan becomes unusable. For this reason, the presence of a thermofuse is very necessary.

Signs of a broken thermofuse and the solution

There are several kinds of fan malfunction, one of which is caused by a thermofuse, here are some signs and how to fix it:

  • Overheating

Overheating can occur if the fan’s thermofuse is damaged due to the fan dynamo being burdened by something. Dynamo is the main component to drive the fan blades. And to move the dynamo required electrical energy assisted by a capacitor.

The load from the dynamo can be in the form of dust that clogs the movement of the dynamo or it could be because the dynamo is too hot. Therefore, a more thorough examination is needed to find the cause. The way to fix it is to clean the dust that clogs the fan dynamo.

  • The Temperature Measurement

Here usually occurs a large difference from the heat between the fan dimano and the thermofuse itself. It should be noted that the heat difference between the two should not be far, because this will cause the thermofuse to be damaged.

How to measure the maximum heat of the fan dynamo can use a thermometer. Then we compare it with the degree value of the thermofuse. If the results obtained by the thermometer are higher than the thermofuse, immediately replace the thermofuse with a higher degree value.

  • The Fan is Broken

A total dead fan can also be caused by a damaged thermofuse. Here we need to find out first the problem. Circumstances where the fan is completely dead means that the fan cannot function properly at all.

If you have found the problem and it turns out that the thermofuse is damaged, you can open the back of the fan. And replace the damaged thermofuse with a new thermofuse.

The trick is to open the fan dynamo cover first. Cut the fasteners and cut the insulation and replace them with new ones. But still do this carefully and slowly.

  • Start Capacitor Malfunction

Generally, fans that have a starting capacitor are fans that have a large size. The use of this starting capacitor is to help the initial rotation and help the rotation become stable when it is on.

Starting capacitor measurements can be done using a multimeter, and damage to this component is usually also due to a broken fan thermofuse.

How to repair a damaged start capacitor can be done by replacing the start capacitor with a new one according to the original. Please do not replace the starting capacitor with a larger or smaller one as it will cause problems with the fan.

  • The Spool is Broken

The problem of damage to the next thermofuse is damage to the spool. This malfunction results in a buzzing sound when the fan is turned on.

This occurs due to electric current flowing in the dynamo but the dynamo is not strong enough to rotate without the help of the spool so that this vibrating sound arises.

The way to repair damage to the fan spool is to buy a new spool. And what should be a concern is that it is not recommended to repair the armature windings because it is difficult, unless you want to rewind the armature coils.

Those are some explanations about the signs when damage occurs to the thermofuse, in addition, it has also been explained how to fix it independently if the same problem occurs with your fan.

Because there are many types of fans, maybe the signs and how to fix it will differ from one another. Take good care of the fan so that it is durable and not easily damaged.