During the use of a tube furnace, there may be abnormal display malfunctions. These faults may be caused by various reasons. Let's take a look at the abnormal faults and handling methods of the tube furnace below!

A commonly used experimental tube furnace (click on the image to view product details)

1. Sensor malfunction
Fault phenomenon: The temperature display of the tube furnace is inaccurate or completely absent.
Possible reasons: Sensor damage or failure.

Handling method:
Use a thermometer and multimeter to test the sensor and confirm if it is faulty.
If the sensor is damaged, it needs to be replaced with a new one in a timely manner.

2. Uneven temperature inside the furnace
Fault phenomenon: Uneven temperature distribution inside the tube furnace, resulting in abnormal temperature display.
Possible reasons: There may be dirt inside the furnace or uneven distribution of heating elements.

Handling method:
Clean the tube furnace and remove any dirt inside the furnace.
Check the distribution of heating elements and make necessary adjustments to ensure even temperature distribution.

3. Controller malfunction
Fault phenomenon: The temperature of the tube furnace cannot be controlled or displayed abnormally.
Possible cause: Controller malfunction or failure.

Handling method:
Use a multimeter to test the controller and confirm if there is a malfunction.
If the controller is damaged, it needs to be replaced with a new one in a timely manner.

4. Power failure
Fault phenomenon: The tube furnace cannot be started or the temperature display is abnormal.
Possible reasons: unstable power supply or malfunction.

Handling method:
Check if the power plug is properly plugged in and if the power cord is damaged.
Use a voltmeter to check if the power supply voltage is stable. If it is unstable, replace it with a stable power supply in a timely manner.

5. Poor sealing of furnace door
Fault phenomenon: Severe temperature loss and abnormal temperature display inside the tube furnace.
Possible cause: Damaged or improperly installed furnace door seals.
Handling method:

Check if the furnace door seal is damaged, and if it is damaged, replace it with a new seal in a timely manner.
Ensure that the furnace door is correctly installed and tightly closed.

6. Other common faults and their solutions
After the tube furnace is powered on, the instrument shows no power supply:
Possible reasons: improper plug insertion, blown fuse, blown control circuit fuse.
Solution: Check if the plug is plugged in or connected properly; Replace the fuse; Check for short circuits and replace fuses.

The power supply and heating elements of the tube furnace are normal, but the temperature inside the furnace does not rise:
Possible reasons: Low set temperature, damaged control circuit.
Solution: Adjust the set temperature; Notify professional maintenance personnel to inspect and control the circuit.
The set temperature does not match the temperature inside the furnace:
Possible reasons: Damage to temperature sensors or temperature controllers, deviation between temperature measurement points and layout points.
Solution: Replace the temperature sensor or thermostat; Set up the layout position to ensure accurate temperature measurement.

Rotating tube furnace (click on the image to view product details)

In general, abnormal display faults in tube furnaces may be caused by various reasons and need to be investigated and handled according to specific situations. When troubleshooting, safety should be ensured first to avoid dangerous situations such as electric shock or high-temperature burns. At the same time, regular maintenance and upkeep of the tube furnace is also an important measure to prevent malfunctions from occurring.Click to learn more tube furnaces! Or click on online customer service to learn more about product information!