Ventilation making strange noises

Started by silkworm, September 21, 2014, 05:36:44 PM

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silkworm

My ventilation suddenly began making a strange noise - loud, harsh rattle. It is a kit from Tuffnell's. I opened it up today and cannot see anything loose and am a bit reluctant to try to get in to the motor itself. Has anybody else had this happen?
Mary

Nicknack

Mine does it when it thinks the flame is a bit hot, and stops when I make it cooler.  I think I need to move the end nearest me a bit higher, so it's not so near the flame.

Nick

Blue Box Studio

My progrow fan did that when it got too hot.  I've got the box variety rather than the inline kind - in the end it fell apart on me once it stopped and cooled down :o Next time I'd go for the inline kind, I was told they don't usually fail?
Sue
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Glyn Burton

I had the same thing. The fans are made from a thermoplastic which soften and distort when they get hot causing them to rub against the casing and thus making the noise. In the end I bought a different fan and raised the inlet up a bit.