Electric heating tubes may fail during use, such as not heating, heating slowly, or burning out. Many users do not know how to troubleshoot, leading to long downtime and increased costs. According to experience, most heating tube failures can be quickly identified and solved with simple tools (such as a multimeter), and mastering basic troubleshooting methods can save a lot of time and money.
The first common failure is that the heating tube does not heat at all. The main causes are broken heating wire, loose wiring, or power supply failure. First, check the power supply: use a multimeter to measure whether the power supply voltage is normal. If the voltage is normal, check the wiring: check whether the terminals are loose or burnt, and tighten the loose terminals or replace the burnt wires. If the wiring is normal, check the heating tube: use a multimeter to measure the resistance of the heating tube. If the resistance is infinite, it means the heating wire is broken, and the heating tube needs to be replaced.
The second common failure is slow heating. The main causes are scale/carbon deposition, insufficient power, or poor heat dissipation. For water heating, check the surface of the heating tube for scale. If there is scale, descale it. For oil heating, check for carbon deposition and clean it. If there is no scale or carbon deposition, check whether the power of the heating tube is consistent with the required power. If the power is too low, replace the heating tube with higher power (according to the power ratio). For dry burning, check whether the fan is working normally. If the fan fails, repair or replace the fan to improve heat dissipation.
The third common failure is the heating tube burning out quickly. The main causes are incorrect power setting, dry burning, or poor insulation. Check the power setting: whether the power per meter is in line with the scenario (1:1.5 for dry burning with fan, 1:1 for dry burning without fan, 1:2 for water, 1:1-1:1.5 for oil). If the power is too high, replace the heating tube with lower power. Check for dry burning: for liquid heating, ensure the heating tube is fully immersed in the liquid. For dry burning, ensure the fan is working normally. Check the insulation performance: use a multimeter to measure the insulation resistance. If the insulation resistance is less than 10MΩ, the insulation material is damaged, and the heating tube needs to be replaced.
The fourth common failure is leakage. The main causes are damaged sheath, poor sealing, or corrosion. Check the surface of the heating tube for damage, corrosion, or leakage. If the sheath is damaged, replace the heating tube. For corrosive liquid heating, check whether the sheath material is suitable. If not, replace it with a corrosion-resistant sheath. Check the sealing of the terminals: if the sealing is poor, re-seal it to prevent liquid from entering the interior of the heating tube.
Another common failure is uneven heating. The main causes are uneven heating zone, unreasonable installation position, or poor liquid/oil circulation. Check the heating tube: whether the heating zone is evenly distributed. If not, replace the heating tube. Check the installation position: adjust the installation position to ensure uniform heating. For liquid/oil heating, check the circulation pump: if the pump fails, repair or replace it to ensure good circulation.
It should be noted that before troubleshooting, the power must be cut off to avoid electric shock. Use a multimeter correctly: when measuring resistance, ensure the power is cut off; when measuring voltage, ensure the multimeter is set to the correct voltage range. According to experience, most heating tube failures are caused by incorrect use or simple faults, and can be solved without professional maintenance personnel.
In summary, troubleshooting electric heating tube failures requires checking power supply, wiring, heating tube resistance, scale/carbon deposition, insulation performance, and installation position. Mastering these basic methods can quickly identify and solve most failures. For complex failures (such as internal short circuit of the heating tube), it is recommended to replace the heating tube or ask professional personnel for maintenance. Different failure types have different solutions, and professional scheme design can help avoid common failures.
