Honeywell Humidifier Water Level Not Going Down: 3 Fast Checks

Honeywell humidifier water level not going down?

Well, first, it means that the appliance is not be increasing your indoor humidity level. Secondly, it could mean that the humidifier is not working as it should.

In the past, we reviewed the Honeywell HCM 350 Germ Free Cool Mist humidifier and we saw that it is one of the most reliable humidifiers in the market.

However, like any other appliance, it can fail to work as expected. You can face the problem of Honeywell humidifier not using water.

So, what should you do if you face this problem?

Here are a few fixes to try:

Honeywell humidifier running but not producing mist – common fixes

honeywell humidifier water level not going down

If the humidifier is running just fine, it has water in the tank and it is not producing mist, that does not mean rushing off to the store to buy a new one. You can try these common fixes first.

1. Check the humidifier filters

No matter how clean the municipal claims our water is, there is always a certain amount of mineral deposits in tap water.

Since all water goes through the humidifier filters, these minerals eventually clog up the filters. One of the problems you can expect from clogged filters is the humidifier water level not going down.

You can start by cleaning the humidifier filters. However, if you have hard water at home, it is best to replace them.

In this case, you need to know how often to change Honeywell humidifier filters. On the Honeywell Store website, they say that you should change their humidifier filters in 30 to 60 days for high efficiency.

However, for a place with hard water, you might have to make the replacement in as little as three weeks.

Replacing the filters should probably fix the problem of Honeywell humidifier not working.

2. Check whether the humidity level is set right

honeywell humidifier water level not going down

If you set the humidity level too low, say at about 30 or 35%, you will not notice the water level in the humidifier going down.

The reason for this is that even in some of the driest cities in America or Canada (in winter mostly), the lowest humidity levels might not get to 40%.

Remember, you are cooking with plenty of steam, you are using the bathroom and laundry room. Therefore, you need to set the indoor humidity level to the recommended 50%.

3. Water inlet float not working for humidifier attached to furnace

Furnace humidifiers come with an inlet float that controls the inflow of the water. However, when it is not working, the water keeps getting inside the appliance.

A whole house humidifier looks like the one below:

Image of Honeywell humidifier water level not going down

A jammed floater will not close the water inlet. Therefore, water keeps running and even with the humidity level set at 50%. You will not notice the water level dropping because it will not drop.

Even if the humidifier water inlet float is not damaged or jammed, it could be poorly adjusted. You will have to check all of those things to be sure.


Honeywell humidifier water level not going down is a real problem. It could happen to any humidifier.

If the humidifier is running and your children complain of dry noses and throats, your Honeywell humidifier is not using water.

You need to check a few things that we have pointed out here. If you have a warm mist humidifier, the elements must heat up so that it can start misting.

If it is a cool mist humidifier, it should start misting soon after you turn it on.