Long term use of resistors can inevitably lead to some usage problems, such as noise and looseness during use, as well as pointer jumping. The problems that may arise from different periods of use are also different. This article introduces some handling techniques for common problems with resistor failures.


(1) First, let's observe the appearance of the thermistor. The potentiometer or thermistor must have clear markings, no rust on the coal or pins, flexible rotation of the rotating shaft, appropriate tightness, smooth hand feel during rotation, and no mechanical noise or vibration.

(2) Gently shaking the potentiometer solder or thermistor pins with your hand should not cause any looseness.

(3) Set the resistance range of the multimeter to the appropriate range, and then adjust the ohm to zero. Finally, use two probes (regardless of positive or negative) to connect to the pins at both ends of the anode, so that the actual resistance value can be measured. Finally, the test value is checked against the nominal value of the resistor, in order to determine whether the potential or thermistor is in good condition. If the pointer of the multimeter is stationary, it indicates that the internal resistor is disconnected.

(4) The center pin of a potentiometer or thermistor is connected to its internal moving contacts. We use the two probes of a multimeter to connect the center pin and any other pin respectively, and then slowly rotate the shaft handle. The pointer of the meter head needs to move smoothly and correspondingly. If the pointer jumps or falls, then it indicates that the movable clock contact point and the anode are faulty in clock connection.

The above is the troubleshooting tips for resistors. That's all for the relevant content. For specific information, please contact our manufacturer for consultation.