If your near-new clothes dryer is not working and only emits a buzzing sound for about 7 seconds before going silent, there might be several potential reasons for this issue. Let's go through some troubleshooting steps to help you identify and possibly resolve the problem:
Check Power Supply: Ensure that the dryer is properly plugged into a working 240 V outlet and that the outlet itself is functioning correctly. Sometimes, a loose connection or faulty outlet can prevent the dryer from receiving enough power to run properly.
Reset the Circuit Breaker: Although you mentioned that no breakers have been thrown, it's worth double-checking the circuit breaker or fuses associated with the dryer's power supply. Even if they appear fine, try switching the breaker off and then back on to make sure there isn't a minor issue with the electrical supply.
Check the Door Switch: Many dryers have a door switch that prevents the unit from starting if the door is not securely closed. Make sure the door is closed properly and that the door switch is functioning. You can try manually pressing the switch to see if it makes a clicking sound or if the buzzing changes in any way.
Inspect the Belt and Drum: If the dryer's belt is broken or the drum is not rotating freely, it may cause the buzzing sound you're hearing. Turn off the power and inspect the belt and drum for any visible issues or obstructions.
Thermal Fuse or High-Limit Thermostat: Modern dryers have safety features like thermal fuses and high-limit thermostats that can trip and prevent the dryer from operating. These components usually trip when the dryer overheats. You might need to access the dryer's back panel to check these components, but be sure to unplug the dryer from the power source first.
User Manual and Reset Button: Consult the user manual that came with the dryer to check if there is a reset button hidden or if there are any specific troubleshooting steps for your particular model.
Professional Repair: If none of the above steps resolve the issue, and your dryer is still under warranty, it's best to contact the manufacturer or the retailer where you purchased it for assistance. If the warranty has expired, consider reaching out to a professional appliance repair service to diagnose and fix the problem.
Remember, working with electrical appliances can be dangerous, so if you're not familiar with troubleshooting or repairing dryers, it's best to seek the help of a qualified professional to avoid any safety hazards.