My Aprilaire 550 has not been working. I checked the voltage on the swich and the wires to the solenoid. They all have current going through. The water is coming out of the lines, so is my solenoid shot?
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It's probably the saddle valve. The self-piercing needle rusts and clogs the water line. Replace the saddle valve with a non self piercing one. Also, check the voltage to the solenoid valve on the humidifier. You should be getting 24 ac volts. If not, replace the transformer. If voltage is present and still no water, then replace the solenoid valve (very expensive).
Hello, apply power directly from transformer to solenoid valve, it it does not turn on the solenoid valve must be replaced. If there is no voltage to the solenoid then follow the wires back and see where there is no voltage.
Hello, I like to apply voltage directly to the solenoid valve to see if is working. Just take the two wires from transformer and connect to solenoid valve, if the valve clicks and water starts flowing the valve is good
Hello, verify if the valve is getting 24 volts, if it is and the solenoid is not opening then replace it. If it is not getting 24 volts then start at the transformer and work you way toward the solenoid to see where there is no voltage.
The first thing to check is if you are getting 24 volts at the transformer, if you are not then turn off power the transformer and check continuity. u should have continuity if not replace the transformer. If you are getting 24 volts at the transformer then apply 24 volts directly from transfomer to solenoid valve you should hear the solenoid cleck open and let the water in, if not then the solenoid is bad and must be replaced. If the solenoid does work by applying voltage directly to it then check the
wiring and make sure it;s all tight. Also check the humidistat and current sensing relay/sail switch to make sure it's functioning properly.
If you are not getting voltage to the solenoid valve then start at the transformer and check if you are getting 24 volts. If not then turn off power to the transformer and set your meter to continuity and check the transformer, if you dont have continuity the transformer is bad and must be replaced. If the transformer is good then check the wring to make sure the connections are tight and the humidistat, if that check out good then the current sensing relay/ sail switch is bad.
yes it should be bypass but solenoid could be trying to open but the voltage to it may be to low if you have 24v ac power at the 2 small wires. but to change shut down power to furnace and water to humidifier.you loosen the 2 compression nuts unwire they cant be reversed so dont worry then 2 mounting screws then reverse to install
The Aprilair Hum. donot have a restart button. All there is there is just a 24VAC Solenoid that opens and lets the water flow throu a tube. Check your humidistat, check your wire going to the furnace control board and also your current sensing relay if you have one.