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Honeywell HE300 Board Not Powering On

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allstar784
allstar784 Member Posts: 1
in Indoor-Air Quality
So I'm installing the HE300 on two air handlers that were retrofitted into a house with radiant hot water heat.

I have the unit installed, Humidistat wired up, water & drain installed. Unit is setup with C & G wired to the Air Handler board w/ default settings.

When I plug unit in, the Humidistat is getting power, however, no lights on the board show even when in test mode or when jumping the U wires. I saw that someone said their unit failed due to transformer failure. Both of these units are new and neither shows lights when testing.

Any thoughts before I send them back to supply house?

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  • HVACNUT
    HVACNUT Member Posts: 7,470
    Which diagram did you use? I don't see one that only uses G and C.

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