I was called to a home to repair a humidifier that was leaking at the nut on the solenoid unit. I arrived at the house and found that the humidifier was not working properly. I diagnosed the issue as a loose nut on the solenoid unit. I removed the old nut and replaced it with a new one, making sure it was tightened properly. After completing the repair, I tested the humidifier to ensure it was working correctly. The homeowner was very pleased with the service and thanked me for my help.