Does anyone know what this is?

[rude]

Someone sent me pictures of this thing inside his return air box and i have never seen it before. Does anyone know what it is? The unit is apparently an Airwell 3phase units i dont have the model number sorry.

http://i1120.photobucket.com/albums/l482/RXF35/1324391548445.jpg

http://i1120.photobucket.com/albums/l482/RXF35/1324391614277.jpg

[MikeHolm]

hard to see but looks like an air pressure switch

[rude]

i thought the same but it has a 9v battery connector there as well and i dont know why it would need one?

[paul_h]

Air pressure switch/alarm to tell you the filter is blocked

[MikeHolm]

AHA, there you go

[rude]

Air pressure switch/alarm to tell you the filter is blocked
Thanks mate much appreciated!

[charlie patt]

its a magnahelix