When my humidifier wasnt working correctly I hadApproved Comfortcome out and take a look at it. After only five minutes the technician noticed that there was a broken water feed tube at my solenoid valve. I had no idea what any of that even meant so the technician explained it to me. I gave him approval to fix my system and it has worked perfectly ever since. I only call Approved Comfort for all my heating and air conditioning needs. You guys rock!!!