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Faulty Air Conditioner Thermistor, Flashing Timer Light

Faulty AC Thermistor, Flashing Timer Light-. The thermistor air conditioner is one of the electrical components in the cooling system that functions as a temperature sensor. If the thermistor is damaged, the AC system will not work normally.

Faulty Air Conditioner Thermistor, Flashing Timer Light

If likened to our bodies, this thermistor is the skin that can sense the temperature of the environment. If the ambient temperature is not suitable whether it is too hot or too cold, then we will react because of the discomfort. If our skin can not feel the temperature that is not suitable, it can definitely harm the body. Likewise the AC unit, if there is damage to the thermistor it will be dangerous for the AC system itself.

Damage to the room temperature detection thermistor.

Faulty Air Conditioner Thermistor, Flashing Timer Light

If the thermistor is damaged, the room temperature will not be read properly. It could be that the room temperature is not cold yet but the system has turned off the compressor so that the temperature setting will not be reached. Or vice versa, the room temperature is already cold but the system does not turn off the compressor, so the room temperature will be very cold (colder than the temperature setting).

Damage to the pipe temperature thermistor.

Faulty Air Conditioner Thermistor, Flashing Timer Light
If this thermistor is damaged, the temperature of the evaporator pipe will not be detected by the system. It could be that the pipe temperature is cold but the system turns off the outdoor unit even though the room temperature has not been set. Conversely, if the pipe temperature is not cold (the AC has no refrigerant) but the system still turns on the outdoor unit. This is very dangerous for the compressor.
Faulty Air Conditioner Thermistor, Flashing Timer Light

In split AC systems, the most frequently damaged is the thermistor detecting the temperature of the evaporator pipe. If this thermistor is faulty, its characteristics are:

Ø  When turned on, the AC system will work as usual. The indoor unit and outdoor unit work normally.

Ø  After 2 – 5 minutes, the outdoor unit will turn off while the indoor unit is still working normally.

Ø  After 10 – 15 minutes later, the outdoor unit will work again and will turn off after the next 2 – 5 minutes.

This will keep repeating itself which results in the room temperature not getting cold because the outdoor unit will stop working before the room temperature setting is reached.

Faulty Air Conditioner Thermistor, Flashing Timer Light

One more characteristic of a damaged thermistor is the timer light or power light is always flashing even though the timer setting is not activated.

To replace an AC thermistor, look for a thermistor that is specifically for the AC brand used. If not, then look for thermistor with the same connector. Because if the connectors are not the same, then the thermistor cannot be installed on the module / PCB.

For a more detailed thermistor definition, you can study electronic components, namely the types of resistors.


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