Question about Honeywell Enviracaire Elite F300E-1019 Air Purifier

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F300E powers up in purge mode, but shuts off when heating

Ok, here is the scenario - My F300E does seem to power on (no light, no snapping with test button) when my HVAC system is running in heat mode. I have a multi-zone system, and when I reboot the Honeywell zone management system and the whole thing goes into "purge" mode, the F300E powers right up and works normally...until the system kicks back into heat mode and ti shuts off instantly.
Any clues on that one? I am under the impression that the unit turns on and off based on the airflow sensor, so why would it care what mode the system is running in as long as the air is flowing through?

I have repeated the process multiple times to be certain it was reproducable behavior. I also cleaned all the contacts and made sure the cells were in good shape before trying out the restarts and all of that. I had noticed a huge increase in dust in the house over the last few weeks and went to check on it today when I found the problem.

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In the heat mode your furnace fan operates in a lower speed. when your zone panel purges it powers the G terminal in your furnace, which is high speed. You may have an airflow problem if your EAC is powered directly to an outlet, you may have a bad air pressure switch, or if the eac is wired to the furnace control board, it is mis-wired..more info needed.

Posted on Jan 20, 2010

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Posted on Jan 02, 2017

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2. Check the cell(s) for broken ionizer wires or bent plates. Repair if necessary.
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