I called Air Makers after having another company in for furnace maintenance. The other company's technician said the humidifier needed replacing as the solenoid was broken (less than 6 years old) for ~$600. That company was supposed to call me with a quote, I didn't hear from them for 3 days, so I gave up on them and booked a request on line with Air Makers. They immediately called me back to make an appointment next day. Brent showed up right on time. Within 30 seconds Brent showed me the humidifier was fine, just needed a new filter. He had a filter in the truck, replaced it, cleaned the unit and it's good as new for $40. Good advice, clearly knows what he's doing, polite, helpful.... excellent service and I highly recommend Air Makers.