Common Failures Of Mold Temperature Controller

A mold temperature controller (MTC) plays a key role in stabilizing mold temperature and ensuring consistent product quality in injection molding, die-casting, extrusion, hot-pressing, and many other industrial processes. Whether you are using a water mold temperature controller (MTC) or an oil mold temperature controller(MTC), equipment failures can quickly disrupt production and lead to higher scrap rates or machine downtime.   To help operators deal with issues more efficiently, this article summarizes common failure points and practical solutions. Below is the troubleshooting table used by most technicians for quick diagnosis.   Common Problems for Mold Temperature Controllers (MTCs) Common Problems Cause Solutions 1. Unable to start, no fault indicator light. 2P2A Circuit breaker tripped Open the circuit breaker to check the cause. Phase loss Check the power cord. Transformer burnt Replace the transformer. 2. The indicator light for lack of media is on. The cooling water is not turned on or the pressure is insufficient Open the cooling water valve and check the pressure. Pressure switch problem Adjust the pressure switch or replace it. Insufficient heat transfer oil Add heat transfer oil 3. Pump overload light on. System overload Check whether the hot water inlet and outlet valves are open and press the reset button; Clear the scale of the electric heater. The power supply voltage is abnormal or the phase is missing Use a three-phase meter to measure the three-phase voltage; Check whether the power supply terminal is loose and tightened, and press the reset button. 4. The temperature is too high and cannot be cooled. The solenoid valve is blocked Clean the solenoid valve The solenoid valve coil is aging or damaged Parts need to be replaced. 5. Unable to heat or reach a certain temperature and no longer rise Solenoid valve is blocked or damaged Clean the solenoid valve or replace accessories. Heating tube burns out Replace the heating tube. 6. The fault light is on and the alarm does not sound Alarm failure Replace the alarm. Note：If the mold temperature controller is overheating, please see our other article: "Troubleshooting Guide: Mold Temperature Controller Overheating Issues".   Why These Problems Occur Most issues with a mold temperature controller (MTC) come from wear, improper settings, incorrect installation, or unstable cooling/heating supply. For a water mold temperature controller (MTC), cooling-related failures—such as solenoid valve blockage or insufficient water pressure—are more common. For an oil mold temperature controller (MTC), high-temperature components such as thermal oil, coils, and heating tubes require more frequent inspection. Regular cleaning, checking of electrical connections, and monitoring temperature accuracy can effectively prevent most failures. How to Prevent Mold Temperature Controller Problems Here are some effective preventive methods to keep your mold temperature controller (MTC) running smoothly: 1. Maintain stable cooling water pressure Especially important for water mold temperature controllers (MTCs), as insufficient flow will cause overheating. 2. Use high-quality thermal oil For oil mold temperature controllers (MTCs), poor-quality thermal oil can carbonize, leading to blocked pipelines and heater damage. 3. Clean heat exchangers and pipelines regularly Scale buildup reduces heat-transfer efficiency and may trigger overheating alarms. 4. Check electrical components Loose wiring, aging relays, or unstable voltage can cause frequent restarts, alarms, or shutdowns. 5. Ensure correct set temperatures Incorrect setpoints can make the controller continuously heat or cool, increasing wear and error rates. Conclusion A mold temperature controller(MTC) is a key device for precise temperature management. By understanding and addressing these common faults and their corresponding solutions, users can ensure the smooth and efficient operation of mold temperature controllers (MTCs), maximizing their productivity and minimizing downtime.    Whether you are using a water mold temperature controller (MTC) or an oil mold temperature controller (MTC), proper maintenance and timely troubleshooting will significantly improve performance.   If you need support or want a customized temperature control solution, our technical team is ready to help (www.hengdechiller.com).    Choose Hengde, Choose Perfect Mold Temperature Controller! Hengde Water Type Mold Temperature Controllers  Hengde Oil Type Mold Temperature Controllers