Aprilaire 550
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No, you have to check for power where the humidifier is tapped off of, either a transformer in the heating unit or terminals on the control board.
No power before or after the transformer.
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post furnace model and brand.
what's the transformer connected to?
what's the transformer connected to?
It says Armstrong Air. Board says Honeywell Smartvalve 11.
Looks like 12-14 gauge black goes to the HUM on the board and the white goes to neutral. 16-18 gauge goes to outside and thermostat
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try to get a picture of set up and control board...from what you say the transformer from humidifier is connected to control board...this is correct..now you need to see if you have 110 volt at control board terminals powering up the trans...then you need to see if you have 24 volts leaving the trans...
How do you post picture? Above the HUM connection. I checked voltage and it was 120 volts. Nothing before or after the transformer.
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check the voltage output of secondary side of the humidifier transformer.
120 v in and no or low voltage out indicates that the transformer is bad, otherwise you have to check the wires feeding the humidifier and humidistat.
120 v in and no or low voltage out indicates that the transformer is bad, otherwise you have to check the wires feeding the humidifier and humidistat.
What wire would it be for the thermostat calling for heat? I have 5wires hooked to the board and the white is the only one not getting 24v
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