homnspector Posted March 2, 2007 Report Share Posted March 2, 2007 RUUD furnace, 2003 model Any ideas why this would crack like this? I have seen the blower housings cracked but not the entire tube. Download Attachment: 2586.JPG 144.75 KB Quote Link to comment Share on other sites More sharing options...
hausdok Posted March 2, 2007 Report Share Posted March 2, 2007 Check this out. Read down to mid-page: http://www.cpsc.gov/cpscpub/prerel/prhtml01/01069.html OT - OF!!! M. Quote Link to comment Share on other sites More sharing options...
Neal Lewis Posted March 3, 2007 Report Share Posted March 3, 2007 Mike, I don't think that black stuff is the HTVP. It looks like the same material as all of those cracked inducer fan housings. Most of the inducer failures were older than 2003, but were common with the Rheem/Ruud. Couldn't tell you why it cracked. Quote Link to comment Share on other sites More sharing options...
Bill Kibbel Posted March 3, 2007 Report Share Posted March 3, 2007 It looks like the crack occurred to relieve a twisting/rotation force. The constant heating and cooling of the plastic probably determined this would be the weak spot. Quote Link to comment Share on other sites More sharing options...
Chad Fabry Posted March 3, 2007 Report Share Posted March 3, 2007 It does look like a torsional crack as Bill suggested. It's likely that a torque load was applied at the time of assembly by twisting the tube into the housing and then "straightening" the assembly by bolting down the blower. Vibration fatigue will eventually break everything. Quote Link to comment Share on other sites More sharing options...
fqp25 Posted March 3, 2007 Report Share Posted March 3, 2007 Was the furnace/venting installed in a tight spot? This could have been caused by poor vent installation. Such as not measuring correctly, leaving a piece a hair too long, or too short, combined with what Chad said. Quote Link to comment Share on other sites More sharing options...
Bain Posted March 3, 2007 Report Share Posted March 3, 2007 I saw something similar during yesterday afternoon's gig. The tube between the draft inducer and the PVC had separated at both vertical seams and flue gases were streaming through the cracks, which is why the bottom of the access panel is so rusted. Umm, and in case anyone is wondering, I wrote up the other leaks and the compression fitting on the gas-supply line, as well. Does anyone know if the black tube has a proper name? Download Attachment: DSC00748.JPG 143.53 KB Quote Link to comment Share on other sites More sharing options...
hausdok Posted March 4, 2007 Report Share Posted March 4, 2007 I've always called it a condensate drain. OT - OF!!! M. Quote Link to comment Share on other sites More sharing options...
homnspector Posted March 4, 2007 Author Report Share Posted March 4, 2007 I guess I'll go with Chad's tortion theory, it is part of the assembly that was factory installed and the crack was not near a connection or joint. My best guess is the tube was partially cracked and usage cracked it completely. It is pretty wierd, that plastic is pretty tough. Quote Link to comment Share on other sites More sharing options...
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