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Old 01-10-2009, 06:16 AM   #1
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draft vent motor for Duomatic Olsen HMS72-D


I have a Duomatic Olsen HMS72-D forced air natural gas furnace. I am having problems with the blower that induces draft for the burners. I do not have any PVC pipes running to or from the furnace. It was manufactured in 1985. The motor freezes up after sitting overnight. It can be moved but with a good amount of resistance. I squirt a little oil into it and it seems to run fine but I don't think I am using the correct oil, just something I had on hand. I think the bearings are no good in it. I am having some estimates for a new furnace on Monday. Any idea where I can find a replacement motor or isn't it made anymore?

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Old 01-10-2009, 07:58 AM   #2
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draft vent motor for Duomatic Olsen HMS72-D


probably a fractional HP...Fasco motor there give us the name plate off the ID motor volts/brand/amps/frame "RPM critical" how it mounts onto the blower house check www.grainger.com or here will give you other options for a complete assembly change out http://bestbuyheatingandaircondition...gory_Code=m-im


Last edited by biggles; 01-10-2009 at 08:03 AM.
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Old 01-10-2009, 11:02 AM   #3
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draft vent motor for Duomatic Olsen HMS72-D


That furnace is obsolete and should be replaced. ROTOM makes aftermarket ventor fans if you can find someone who sells them. Try here:http://www.alltemp.ca/index.php

Last edited by yuri; 01-10-2009 at 11:09 AM.
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