I have an in-line fantech dryer booster fan. It runs non stop for prolonged time with or without the dryer on. Anyone have any guesses why?
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Replies
It could be sunspots...... or..........
How is it wired? Is there a connection to the dryer? Is it on a current sensing line triggered by the dryer turning on? Or is it on a manual switch to be turned on and off by the home owner?
We need a bit more info here, please.
Fantec dryer booster
GOOGLE Fantec Dryer Booster Fan Installation Instructions This unit has a pressure regulating diaphram that can be adjusted. The location is important... The instructions are clear Most dryers can only exhaust 12 equivlent feet of galvanize duct Each 90 degree elbow is 7 feet of straight duct every cap is approx. 10 feet of duct Remove any screeeing if there is a roof cap and put a cage around the roof cap so no animals can enter.. NO flexable duct.. If you are not sure of the total feet of duct the dryer can exhaust download the Mfg. Model No. Installation instructions.... You might not need the fantec fan
Jet
Take a look at the info in this link and compare it to your directions for vent pipe allowable length.
Is this wrong? It is much different from your example.
http://www.appliance411.com/faq/dryer-vent-length.shtml
Yep, I would guess it's either triggered by a pressure switch near the fan, or a current transformer attached to the dryer. You should be able to tell which by observing whether any wires (other than the regular power wire) are leaving the area of the fan.
I've never dealt with one of these fans, but if it's a pressure switch style there likely is some sort of adjustment. And if adjusting doesn't fix it then likely the switch is broken.
But keep in mind that the way these things would work is that they come on when they sense pressure, then turn off when they sense a vacuum higher than "normal" for when they're operating. Air leaks into the duct or a clogged fan or duct can prevent the proper vacuum from developing.