Question about Honeywell Electronic Programmable Heat/Cool Thermostat - CT3300A100 Heater
Hello,You need makeup "fresh" air intake vent added.You have a attic fan or when a clothes dryer,range hood,bathroom fan runs it pulls the house into a vacuum or negative pressure.It will pull air from anywhere it can to balance the pressure.Try leaving a window open a little bit for a couple of days(if you can do safely)and see if it works.Then you need a outside air vent installed.I assume the AC intake/return are seprate from the neighbors.
Posted on Oct 11, 2010
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Posted on Jan 02, 2017
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