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Posted by ransley on October 22, 2009, 10:57 am
> Big_Jake wrote:
> >> ransley wrote:
> >>>> We have a couple of high efficiency, condensing gas furnaces with
> >>>> forced hot air used to heat our home.
> >>>> So far, every year at the start of the heating season, I have been
> >>>> doing the following for maintenance.
> >>>> 1. Thoroughly vacuum out the interior
> >>>> 2. Clean the condensate pump of accumulated crud
> >>>> 3. Wash the air filter (it's a simple low-end washable one)
> >>>> 4. Inspect for cracks, loose wires, funny noises, etc.
> >>>> I have a CO detector mounted near all the heaters.
> >>>> - Do I need to clean the burners, igniters, heat exchanger, etc? Or
> >>>> =A0 are they best left alone if everything is working properly
> >>>> - Is there anything else I need to be doing from a regular maintenan=
ce
> >>>> =A0 perspective?
> >>>> - Is there any need to call in an official HVAC person for
> >>>> =A0 (additional) preventive maintenance?
> >>>> Thanks
> >>> Wont a cheap air filter bypass alot of dirt and coat the heat
> >>> exchanger reducing its efficency, at least thats my thought so I use
> >>> the 4" media, have you ever cleaned the heat exchanger, are burners
> >>> burning right, is exchanger temp in the proper range, how about the
> >>> blades on the blower fan, are they clean, if dirty that would indicat=
e
> >>> a inefective air filter. Im no pro but im sure there are even more
> >>> things to do.
> >> I'm not sure what kind of furnace you have, but the pros aren't going =
to
> >> inspect the fan, at least not in the one I have. =A0Inspecting the fan
> >> requires rather extensive disassembly. =A0I don't know about the burne=
rs,
> >> but I don't think they are easy to get at. =A0In all about all the
> >> pros can do would be to check flow and temperature rise. =A0And I'm no=
t
> >> sure about temperature rise. =A0There is no convenient place to put a
> >> probe just before and after the furnace. =A0They would be pretty much
> >> limited to the air at the return vent and a supply vent.
> >> In fact I think almost all they can do is to replace the filters with
> >> their overpriced filters.
> >> Bill
> > I can get a pretty good look at my fan just by taking the door off the
> > blower compartment. Temperature rise is a snap to check, with a probe
> > type thermometer. =A0You just use a sheet metal screw (1/2" x #6) like
> > they use to install the bulk of the sheet metal around the furnace, to
> > punch a hole in the cold air drop and plenum, and test with the
> > thermometer. =A0A meat thermometer could be used in a pinch.
> > JK
> Well, taking the cover off of the blower compartment on mine involves
> removing the air intake and exhaust lines that run down in front of it,
> and then unmounting the control circuit board that is mounted on the
> cover. =A0Not something to be undertaken lightly.
> I realize that I could do something like your description of the
> temperature test, but the average tech isn't going to take the time
> to go punching holes in the plenum to do it.
> Bill- Hide quoted text -
> - Show quoted text -
I just drilled a hole and was carefull about the AC, getting it at the
top of the exchanger is important, go up maybe 1ft and temp drop is
alot
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