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Humidifier Chassis Cut Out
13-1/4"
Troubleshooting
1. My humidifier will not operate.
Check for the following:
• Set thermostat to operate both furnace burner and blower. Operation may be necessary for system power.
• Humidity level in home may be higher than humidistat setting. Increase humidity setting on humidistat (generally
located on furnace return plenum or on an inside wall in the living space).
• Verify water supply is on.
• Check for voltage at the solenoid valve. Voltage should be 24VAC.
• Verify wiring of humidifier and humidistat.
• Contact licensed GeneralAire
2. Proper voltage present at solenoid valve (24 VAC) but no water flow.
This can be caused by any of the following:
• Verify water supply is on.
• Verify metering orifice is not obstructed. Very hard water with high mineral content may restrict the metering
orifice in as little as one heating season. Replace Yellow metering orifice GA4231 if restricted (GFI #7580)).
3. The humidifier runs without furnace operation or humidifier never shuts off.
Check for the following:
• Verify humidifier and humidistat wiring. Humidifier should operate with furnace burner or blower cycle.
4. Too much humidity in home and/or condensation on windows.
•
Reduce the setting on the humidistat. Refer to How The Humidifier Works Section of this manual to estimate
a humidity setting for the home based on outside temperature (humidistat generally located on furnace return
plenum or on an inside wall in the living space).
IMPORTANT: To ensure your safety and the longevity of your unit,
!
we recommend contacting a licensed contractor to perform
any repairs or maintenance.
13-3/4"
15-1/2"
contractor to verify voltage in and out of the relay board, and replace if necessary.
®
Model 570 Humidifier Installation Manual
8-7/8"
9-1/2"
Humidifier Chassis with plenum
cut out shown as dashed lines
9
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