Quote:
Originally Posted by fordracing65
heater is making a loud vibrating humming noise on hi, low works fine but hi really makes loud noise is this normal for these heaters. it blows heat just noisy, any advice would help.
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Clearly your cammer motor runs too smoothly. Just joking. No, mine makes a bit more noise on each successive setting, but nothing like you describe. Loose blade, out-of-balance blade and contacting a shroud are what come to mind.