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Why does the furnace blower come on whenever we turn on one of the bathroom fans? The thermostat is set to "OFF" and the fan is set to "AUTO. The furnace blower stops as soon as the bathroom fan is turned off.

Post created: 2013-07-30 Type of Equipment: Furnace Views: 100

This question was created on the page: https://www.furnacecompare.com/furnaces/york/diamond-90.html.

Furnace was installed in 2001. We just bought the house a month ago. Have only just realized what's happening. Cold air blows from all the vents in the house when the bath fans are on.......

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