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DougG 
Orange Level
Joined: 20 Sep 2009
Location: Mo
Points: 8256
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 Topic: Hardy wood furnace blowing warm air???
Posted: 17 Feb 2019 at 11:45am |
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Got a Hardy wood furnace that just started blowing cool air, was working great then yesterday the air is just warm not hot enough to heat a 1200 sq ft house , usually blows us out with heat, Ive replaced the pump as it seemed like it was weak, really no change, anyone familiar with these ? Forgot this the water temp is set at 180, and was working fine and tank is full
Edited by DougG - 17 Feb 2019 at 11:47am
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DMiller
Orange Level Access
Joined: 14 Sep 2009
Location: Hermann, Mo
Points: 33168
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Posted: 17 Feb 2019 at 11:53am |
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Should have check valves to control flow IN and OUT, if the Inbound failed could stop flowing forward. Can also get Too warm flow a bubble(Steam) into the pump, they will not pump air or steam.
Edited by DMiller - 17 Feb 2019 at 11:56am
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chaskaduo
Orange Level
Joined: 26 Nov 2016
Location: Twin Cities
Points: 5200
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Posted: 17 Feb 2019 at 11:57am |
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I had a pump coupler to the motor go on me once. Couldn't tell if it was out listening to it.
Edited by chaskaduo - 17 Feb 2019 at 11:58am
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1938 B, 79 Dynamark 11/36 6spd, 95 Weed-Eater 16hp, 2010 Bolens 14hp
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Owen64
Bronze Level
Joined: 12 Nov 2017
Location: Cameron Mo
Points: 5
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Posted: 17 Feb 2019 at 12:43pm |
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May need a clean furnace filter
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Ron Eggen
Orange Level
Joined: 15 Sep 2009
Location: Lohman, Missour
Points: 546
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Posted: 17 Feb 2019 at 5:18pm |
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Is the water in your furnace 180 degrees ? Is your draft motor working ? Are your pieces of wood laying flat and not bridging ? Are your ashes cleaned out ? i have had several wierd things happen to mine, but most end up being due to something I did or didn't do. Call Larry Hoelscher if you need more tech help. He has been installing and fixing for over 40 yeears.
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Tbone95
Orange Level Access
Joined: 31 Aug 2012
Location: Michigan
Points: 11979
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Posted: 18 Feb 2019 at 7:33am |
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So, your wood furnace water comes through a water to air heat exchanger, air blows over that to heat your house? Are the pipes connected to that hot? If they are, but the air blowing over it is not, then either the fluid side of the heat ex could be getting fouled with scale (how old is it?) or, the air side could be covered with dust/ other.
Edited by Tbone95 - 18 Feb 2019 at 7:35am
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klinemar
Orange Level
Joined: 14 Sep 2009
Location: Michigan
Points: 8045
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Posted: 18 Feb 2019 at 12:00pm |
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Having trouble with my Hardy Water Stove. Dealer says need to replace solenoid valve that controls pump. Pump will come on for a few minutes and then shut off. Heat Exchanger doesn't get hot as pump does not circulate enough hot water. Dealer said switch wires on solenoid so pump runs all of the time until he can get here this afternoon.
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klinemar
Orange Level
Joined: 14 Sep 2009
Location: Michigan
Points: 8045
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Posted: 18 Feb 2019 at 8:01pm |
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Dealer changed coil on Wood Burner and Coil and Fuse on Gas Furnace and everything is working as it should!
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DougG
Orange Level
Joined: 20 Sep 2009
Location: Mo
Points: 8256
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Posted: 19 Feb 2019 at 4:06am |
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Must have been air as i been messing with it bleed the lines again and got it working thanks for all replies
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jaybmiller
Orange Level Access
Joined: 12 Sep 2009
Location: Greensville,Ont
Points: 24360
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Posted: 19 Feb 2019 at 6:29am |
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sure glad you're 'warm and toasty' ! One thing I remember from the boiler guy I used was he said to run the pipes so that NO air can get trapped when water's not in motion. I also no some cars are a REAL PITA to 'bleed' and will overheat the engine andpoof...scrap metal..
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3 D-14s,A-C forklift, B-112
Kubota BX23S lil' TOOT( The Other Orange Tractor)
Never burn your bridges, unless you can walk on water
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