How to Fix Leaks in Whole House Humidifiers

What You'll Need
Can of Compressed Air
New Water Panel Evaporator

Whole house humidifiers are great for houses with dry air inside of them (usually a by-product of furnaces heating air during the winter). Sadly, when these humidifiers leak, they can cause serious damage to a home. Here are some of the common causes of humidifier leaks along with simple instructions on how to fix them and get the humidifier back into working order in no time.

Step 1 - Check the Drain Line

If the drain line becomes kinked or clogged, the water will not exit the unit properly and the resulting backed-up water may leak out of the sides or bottom of the humidifier. Simply, remove any dips, hills, or kinks in the drain line, and flush it with hot water to fix this problem. If the line itself has a a hole or tear in it that leaks, replace it.

Step 2 - Replace the Water Panel Evaporator

If the water panel evaporator is clogged, it could cause a build up to form on the scale control insert which would, in turn, block the drain line. In this case, merely slide out the water panel evaporator and replace it with a new one. After the old water panel evaporator has been removed, but before the new one is installed, be sure to scrub the scale control insert clean and flush it out to remove the build-up causing the blockage.

Step 3 - Check the Solenoid Valve

The solenoid valve on the humidifier must be flowing in the correct direction and free of any debris that may keep the valve from closing completely. First, find the arrow on the solenoid that indicates which direction the water flows through it. If necessary, remove and reposition the solenoid valve so that the water flows through it in the correct direction. If the solenoid is placed correctly but the unit is still leaking, remove the valve from the unit, and unscrew the cover. Some covers will twist off, but it is likely a screwdriver will be needed. Once the cover has been removed, use a can of compressed air to remove any debris from the inside. When finished, carefully reassemble the solenoid valve and fit it back into the unit.