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SteveM C/IL 
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Joined: 12 Sep 2009
Location: Shelbyville IL
Points: 8751
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 Topic: Home heat oil stove
Posted: 20 hours 22 minutes ago at 11:19am |
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I've got an old Monogram oil stove that was used for home heating. Has a reastat run fan built in to oil flow control. Just lately has started to lose fan speed after an hour or so running. Visual inspection of reastat and electronic spray cleaning hasn't changed anything. Fan spins freely and have oiled it to boot. Is it the fan motor dieing or reastat failing? Have owned it 50 yrs. I suppose a voltage check out of reastat is what i need as it just starts slowing down. Shut it down for a while and it works again. Don't know what to do. Used to heat my shop. Any ideas? TIA that fan has alot of hours on it. How would a pro diagnose it?
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steve(ill)
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Joined: 11 Sep 2009
Location: illinois
Points: 89286
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Posted: 18 hours 35 minutes ago at 1:06pm |
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i would bypass the thermostat.. Run power straight to the fan and let it run wide open all day long... Would be a good test to determine if the motor has a problem... Old windings could be breaking down when hot, or bearing could be expanding with heat and causing a little drag...
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Like them all, but love the "B"s.
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SteveM C/IL
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Joined: 12 Sep 2009
Location: Shelbyville IL
Points: 8751
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Posted: 18 hours 3 minutes ago at 1:38pm |
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Yeah i wonder if it has brushes. Need to try your suggestion first before tearing into. I don't understand why stuff don't last forever......
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Lars(wi)
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Joined: 14 Sep 2009
Location: Permian Basin
Points: 8298
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Posted: 13 hours 29 minutes ago at 6:12pm |
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Are you using ‘electric motor oil’?
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I tried to follow the science, but it was not there. I then followed the money, and that’s where I found the science.
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SteveM C/IL
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Joined: 12 Sep 2009
Location: Shelbyville IL
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Posted: 13 hours 9 minutes ago at 6:32pm |
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It is "3 in 1" oil. Isn't that correct?
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Lars(wi)
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Joined: 14 Sep 2009
Location: Permian Basin
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Posted: 12 hours 37 minutes ago at 7:04pm |
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3 IN 1 is good for door hinges, bicycle chains, etc. There is specialized oil, for electric motor bearings. I do believe the makers of 3 IN 1 do market a specialized grade of lubricant oil, with ‘For Electric Motors’ printed in bold lettering on the front of their little cans.
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I tried to follow the science, but it was not there. I then followed the money, and that’s where I found the science.
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Walker
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Joined: 12 Sep 2009
Location: oh
Points: 9083
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Posted: 10 hours 31 minutes ago at 9:10pm |
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Go to a Hobby Shop and get some of the stuff they use on model RC airplanes and car motors. It made me a believer on a grandfathers clock works that refused to run on 3 in 1 oil. More reastats that came to me ailing needed to be cleaned or replaced, more than oiled.
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SteveM C/IL
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Joined: 12 Sep 2009
Location: Shelbyville IL
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Posted: 8 hours 36 minutes ago at 11:05pm |
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I washed down the reastat coil with electrical contact cleaner. Didn't oil it.
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DMiller
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Joined: 14 Sep 2009
Location: Hermann, Mo
Points: 34938
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Posted: 3 hours 28 minutes ago at 4:13am |
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Main issue is time on rheostats. Moisture and/or damp air to being close to the higher heat of a machine or furnace having ill effects on moisture delivers really foul corrosion or in air mineral buildup. At the nuke on a number of the oldest systems we actually had instructions to periodically ‘Wipe’ the system rheostats to burnish the buildup of corrosion or mineral deposits off.
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