My Hisense 70 pt. Humidifier keeps shutting down and reads E9

could be 2 reasons.

1. It's the humidity sensor.
2. blocked drain line.

If you do not already have one get a cheap hygrometer at Lowes or Home Depot and put it in your humidor at eye level. Then run your unit until it reads 70 percent. When the unit is balanced in other words shuts off at that humidity you are set. Use a majic marker to mark the position and you are done. Let me know how this works out.

hardrocko

My Aprilair 560 turns on and off repeatedly.Making a loud banging sound.Changed my water valve worked 1 day and started agin.

The humidifier should not turn on untill the furnace blower starts. Since the fan stays on. does the solenoid valve also stay on? If they both stay on you probably have a bad humidistat. If only the blower stays on then the circuit bourd in the humidifier is defective.
Good luck
HVAC Teacher

You may need to replace the valve that is wired to the furnace that controls the water flow

Have you measured the amount of water dripping into the drain? The specification is 1 quart in 2 and half minutes. If it is much less, get your solenoid checked. I had the same problem and got it replaced and it works as per specification now. You also need to see how many minutes in an hour your furnace is actually running. The humidifier runs only when the furnace is, so the more it runs the better. The specification is 35% with the furnace running at 70%.

you should have a humidistat that should shut it off when set to zero. if the water solenoid is stuck, water will keep coming out even when the system is not heating. all humdifiers will have a water line ran to them. yours is most likely a 1/4"copper line that runs from the water solenoid on the side or bottom of the humidifier to a saddle valve on one of your water lines. this saddle valve is usually installed very close to the water heater. follow the line to the valve and shut the water off. sometimes you have to loosed the nut on the water valve to get it to turn easily. do not loosend the nut more the 1/4 turn and then make sure you tighten it back down after shutting the water off.

flame rod sensor

Try this link:

http://yourhome.honeywell.com/yourhome/Applications/TechLit/TechLitSearchResults.aspx

It looks like there are a variety of model numbers for the Chronotherm III. Hopefully you can locate your model number.

Reset the unit once it is refilled by pushing the power button and holding it down for 5 seconds before releasing. This should reset your unit to factory settings.