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TT sounds like a trombone
I installed a TT PS 60 in fall OF 2011 just as the heating season finished it started to make a howling noise upon cold start-up. When the customer fired it up for this season it is still doing it. I finally had a chance to closely look at it. It only lasts for about 20-30 seconds, I was thinking that the air supply pipe to the blower was the right length to start resonating, I removed it and still does it. When it stopped howling, I put my fingers over the blower hole at the venturi and it would howl until I removed my fingers, then quiet. Has anybody ran into this, if so what did you do to fix the problem. I thought I'd check with you guys first before going to tech support at TT. Thanks for your help.
Rich Davis 3-M's