9
www.generalfilters.com
Model 1099LHS Humidifier Installation Manual
Troubleshooting
1. My humidifier continues to run.
Check for the following:
• The valve might be stuck in the "open" position.
• Check for wiring errors.
• Is the unit sized properly for your home? If it is rated for a smaller-sized home than the home in which it is
installed, it will work "overtime" to reach the humidification levels desired.
• Check the Vapor Pad
®
. If it is clogged, the pad will reduce the humidifier efficiency. Replace if necessary.
2. My solenoid valve is making a "chatter" noise.
This can be caused by any of the following:
• The power to the valve is less than 18V AC.
• The solenoid is causing a "water hammer condition" thru the water pipes (valve closes quickly and shuts off
water flow, which in turn creates pressure behind the valve that has no avenue of relief). You may want to install
a water hammering device with your plumbing, or contact your local plumber to determine the best solution.
• The humidistat is located too close to the humidifier or the by-pass pipe. Your humidistat should be a min. of
1.5' away or greater.
• The humidistat could have a buildup of dust, causing a faulty reading.
• The solenoid valve might be dirty. Remove, inspect and clean if necessary.
• Water supply pressure going to the valve may be too low.
• The hold down nut on top of the solenoid, as it may be loose.
3. The humidifier is not raising the humidity levels in my home.
Check for the following:
• Ensure you have changed / replaced your Vapor Pad
®
at the proper intervals (once per year) to ensure the
greatest production of moisture.
• Check the setting of your humidistat to ensure it is set higher than current humidity levels in your home (when
in doubt, turn it all the way to the right at maximum production). If you don't know what your current humidity
level is, use an instrument called a thermohygrometer (Model 610; GFI #7065 suggested) to measure both heat
and humidity levels in your home.
• Calculate your humidity load (Gallons Per Day - GPD) via our humidity calculator (www.generalfilters.com/
Support Center). Check to see that your humidifier model is designed to produce the amount of moisture (GPD)
you need.
• Have you recently installed hardwood floors? Have you recently remodeled and added on to your home? These
can both increase your home's demand for humidity. Options include connecting your humidifier to the hot
water supply (which can increase output by as much as 30%), or installing a new humidifier model that can
generate more humidity.
• The unit is not recommended for heat pumps or plenum temperatures < 120° F.
4. My humidifier will not turn on.
The following might be occurring:
• Check to see your humidifier is plugged in, that the breaker is engaged, and that power to other items from the
same source is working.
• Check the on/off switch to be sure it is in the O (Open / Summer) position.
• Ensure a fuse has not blown.
• Check that connectors are properly inserted in the terminal block.
• Make sure the furnace is operating in the heat mode.
To ensure your safety and the longevity of your unit, we recommend
contacting a licensed contractor to perform any repairs or maintenance.
!
