Your hair dryer no longer heats properly? The air coming out is cold or its flow has greatly decreased? The usefulness of a hair dryer is greatly reduced, or even non-existent, when it no longer emits heat. But where does this problem come from? The origin can be various, although very often, unfortunately, it comes from a hardware failure. The question then arises: can you repair a hair dryer that is no longer hot? Everything will depend on the breakdown and your electrical clearances.
Why is your hair dryer not getting hot anymore?
When your hair dryer is no longer hot, several factors can explain it, although generally it announces the failure of a component. Here are the various factors that may be involved:
1 – Overheating of the device
It is possible that your hair dryer no longer heats because it has overheated. Indeed, in the event of overheating, some hair dryers are programmed to automatically turn off or blow cold air. This prevents prolonged overheating which could damage components sensitive to extreme temperatures, such as the motor, which could melt.
To confirm this hypothesis, turn off the hair dryer and wait about ten minutes let it cool. If turning it on again, the hair dryer still does not blow hot air, then the fault is probably of hardware origin. On the other hand, if it heats up again, the problem was indeed overheating. You will then need try to find the source of the heat too much to prevent this from happening again. We will see this in the second part of the article.
2 – Incorrect setting of the hair dryer
It may also be that your hair dryer no longer blows hot air because you accidentally touched the settings. Although it may seem logical, sometimes we forget to check the most basic problems. Then check that you haven't unintentionally changed the heat setting on the hair dryer. Also, make sure you haven't accidentally pressed the cool button on your hair dryer.
3 – A component failure
Finally, in most cases, your hair dryer no longer produces heat because a component is faulty. The resistance is the element to incriminate when your hair dryer works but no longer heats up because it is the device of the device that heats the air. If your hair dryer has a switch (which allows you to adjust the temperature) this can also be faulty. Finally Yes your hair dryer is not blowing air at all, the problem may come from engine which operates the blower system and therefore the turbine.
What to do when your hair dryer stops heating?
To find the reason why your hair dryer is not heating and repair the fault as best as possible, you will have to carry out more or less technical checks and manipulations. If you are not competent in certain manipulations, call a professional or replace the hair dryer.
Check the general condition of the hair dryer which is no longer hot
When your hair dryer no longer heats up and has turned off or that he starts blow only cold air until next use, he may have overheated. In this case, you will need to check the following points:
- Be sure that nothing obstructs the air circuit of the hair dryer. Make sure to always leave the air inlet and outlet free to avoid overheating the device.
- If you use your hair dryer for a long time, i.e. more than twenty minutes, be sure to activate the cold air button from time to time. This makes it possible to lower the temperature of the internal components and thus avoid overheating and therefore a breakdown of the device.
- Clean the air vent using a soft brush. If the model of your hair dryer allows it, also clean the filter. Follow the cleaning instructions for your model.
If your hair dryer stopped in use, and refuses to heat up or work normally again, or it does not turn on at all, we invite you to read the following article: hair dryer that stops by itself, what to do? In particular, you will find information on the components which may have failed and which will need to be tested if you have the electrical authorizations to do so.
Test and replace the various components of the hair dryer that does not heat up
For the hair dryer to be able to produce hot air, two elements are essential: a engine which activates the turbine and/or the propeller and which therefore circulates the air in the hair dryer and the resistance which heats the air. Many hair dryers also have a switch to adjust the temperature.
As we saw earlier, most of the time when your hair dryer is no longer hot, the problem stems from a failure of one of these components. In the majority of cases, it is the resistor that is faulty. It will then be necessary to disassemble the hair dryer, test the components, then replace them if one of them is defective.
However, note that disassembling a hair dryer is particularly laborious, and spare parts are very difficult, if not impossible, to find. In addition, there is a risk of electric shock and irreversible damage to the device. If you do not have electrical clearances, these manipulations are not made for you. You will then have to contact a professional repairer or buy a new hair dryer.
Note: If your hair dryer that does not heat up is still under warranty, contact the After-Sales Service the brand of the device for a free repair or exchange of the product. Do not disassemble, as you will lose your warranty rights!
Resistance
The resistance or resistors is located at the head of the hair dryer. It's a wire (usually a chrome-nickel-iron alloy) that looks like a big spring found in ballpoint pens. When the electric current passes through it, it turns red and restores the energy in the form of heat. The turbine propels the air towards this wire. Thus, when the air comes out, it has just been heated by passing through the resistance.
You will have understood it, when the resistor no longer works, the hair dryer air does not heat up. This component can break if the device takes a shock, but it can also fail without warning with natural wear and tear after years of use.
To test the resistance, it will be necessary to disconnect the device from the current, disassemble the hair dryer and disconnect the connectors of the resistance. Then set the multimeter to the ohmmeter position and place the tip keys on its terminals. If the value is 1, the resistor is cut. It is therefore defective and will have to be replaced.
The switch
Le switch (or switch) allows you to choose the temperature of the device. If it is faulty, your hair dryer may no longer blow hot air. Once again, it will have to be tested. To do this, disconnect the device from the power supply and open the hair dryer. The switch is located on the handle, near the temperature setting. If these terminals are burned or damaged, it must be replaced.
If visually nothing looks suspicious, test it electrically. To do this, do a continuity test using a multimeter set to ohmmeter. Test each terminal of the switch. If there is no continuity between a pair of contacts, the switch has failed. It will then have to be replaced.
Engine
Finally, your hair dryer no longer heats up because the motor has broken down. In this case, the hair dryer not blowing or more enough to send the air into the resistance. To recognize this breakdown, you must first listen if you hear the usual noise of the engine. If so, it's probably not faulty. If, on the other hand, the hair dryer no longer makes any noise, then it is certainly faulty.
To test it electrically, once again disconnect the power to the unit, open it up and measure the voltage across the motor terminals using a multimeter set to AC voltmeter. If the voltage is approximately 220V, it is working normally. Otherwise, it is defective. It will then have to be replaced by an identical one.
Note that if you hear the sound of the motor but the hair dryer does not blow air, it can also be the turbines (or propeller) which is defective. It will have to be controlled mechanically. If you feel resistance when turning it manually, it's probably faulty. Since the turbine is located at the back of most hair dryers, behind the air vent, you can also visually observe if it is rotating by operating the hair dryer's power supply, without having disassembled the device.
Contact a professional or replace the hair dryer
If you are not competent in the manipulations or you have not managed to identify why your hair dryer is no longer hot, then you will need call a professional ou replace the device.
If your hair dryer that does not heat up is still entitled to warranty, call the manufacturer's after-sales service. On the other hand, if your device is no longer entitled to the guarantee, we advise you to replace it. Indeed, generally the price of this type of repair is not worth the cost.
