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Furnace problem!


311Hemi

Question

Furnace has been working off and on at the end of last year and the few days this fall.

I will hear it ignite and burn for a few seconds then go out. They it will attempt to reignite, burn for a few seconds and then go out again.

I am thinking the thermocouple needs to be replaced....but any other thoughts?

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  • 'we have more fun' FishingMN Creators

The rapid cycling is a symptom of the sensor probe either malfunctioning due to crud build up or a faulty part.

Mine has needed to be pulled a few times over the years to clean off the white crud that for some reason accumilates there. Use a little steel wool to clean it off and reinstall and it works fine.

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I had a similiar problem with a Lennox model. It would work fine after cleaning or replacing the sensor. The furnace guy eventually replaced the probe with an electronic system.

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I just spent $353 to replace a circut board that had a burned out piece on it. I kept restarting the furnace, per

the instructions, but it kept going out so I had to call in

a guy. The repair guy said it was just one of those things.

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We had a cracked heat exchanger and it had the same symptoms mentioned. If we left the door off it would work fine. Super dangerous if this is the case. The only way we knew what was happening was our carbon monoxide detector went off and we called Minnegasco.

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After digging in to it I don't have a thermocouple, it has the flame sensor. I cleaned it off and it still did not work. Somehow the negative pressure switch was stuck in the open position so the blower would not start at all (there was a blinking light code saying it was a pressure switch). I pulled the hose and cleaned it, put it all back together and it fired up right away. Not sure these are the correct terms as I am not an HVAC guy!!

Thanks for the info!!!

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Same thing happenend to me in my intake vent. I must have been blowing leaves when it was on, as it sucked up some leaf debris. I just had to pop the pvc pipe off where it enters the furnace, clean the leaf debris out, and it has been flawless since. First thing to try now smile.gif The blinking lights told the furnace guy on the phone what was going on, and he told me what to try. Sometimes technology is good wink.gif saved him from needing to come out!

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I will have to check the vent outside. I actually pulled the hose of the valve in the furnace and cleaned the dust out of it. I didn't even check the outside vent. Good to know.

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I think my father had somewhat of a similar problem, it would start, then shut off, but i can't remember all the symptoms. what it ended up being was on the drain, there was a baffle and it was plugged, causing a backup of water, which shut it off, we took it apart, cleaned it and it worked just fine. I do not know what they have for a furnace, or what the exact symptoms were, just something i remember helping with. might be related, might not.

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  • Your Responses - Share & Have Fun :)

    • leech~~
      Nope not me.  May want to go nextdoor and ask around?  
    • smurfy
      Looks to me like Leech brought his chair home!!😅😆
    • Brianf.
      I'm not there, so I can't tell exactly what's going on but it looks like a large area of open water developed in the last day with all of the heavy snow on the east side of wake em up Narrows. These two photos are from my Ring Camera facing north towards Niles Point.  You can see what happened with all of snow that fell in the last three days, though the open water could have been wind driven. Hard to say. .  
    • SkunkedAgain
      Black Bay had great ice before but a few spots near rockpiles where there were spots of open water. It looks like the weight of the snow has created a little lake in the middle of the bay.  
    • LakeofthewoodsMN
      On the south end...   Thanks to some cold spring weather, ice fishing continues strong for those still ice fishing.  The bite remains very good.  Most resorts have pulled their fish houses off for the year, however, some still have fish houses out and others are allowing ATV and side by sides.  Check social media or call ahead to your favorite resort for specifics. Reports this week for walleyes and saugers remain excellent.   A nice mix of jumbo perch, pike, eelpout, and an occasional crappie, tullibee or sturgeon being reported by anglers. Jigging one line and using a live minnow on the second line is the way to go.  Green, glow red, pink and gold were good colors this week.     Monster pike are on a tear!  Good number of pike, some reaching over 45 inches long, being caught using tip ups with live suckers or dead bait such as smelt and herring in 8 - 14' of water.   As always, work through a resort or outfitter for ice road conditions.  Safety first always. Fish houses are allowed on the ice through March 31st, the walleye / sauger season goes through April 14th and the pike season never ends. On the Rainy River...  The river is opened up along the Nelson Park boat ramp in Birchdale, the Frontier boat ramp and Vidas boat ramp.  This past week, much of the open water skimmed over with the single digit overnight temps.   Areas of the river have popped open again and with temps getting warmer, things are shaping up for the last stretch through the rest of the spring season, which continues through April 14th.   Very good numbers of walleyes are in the river.  Reports this week, even with fewer anglers, have been good.  When temps warm up and the sun shines, things will fire up again.   Jigs with brightly colored plastics or jigs with a frozen emerald shiner have been the desired bait on the river.  Don't overlook slow trolling crankbaits upstream as well.   Good reports of sturgeon being caught on the river as well.  Sturgeon put the feed bag on in the spring.  The bite has been very good.  Most are using a sturgeon rig with a circle hook loaded with crawlers or crawlers / frozen emerald shiners. Up at the NW Angle...  Ice fishing is winding down up at the Angle.  Walleyes, saugers, and a number of various species in the mix again this week.  The bite is still very good with good numbers of fish.  The one two punch of jigging one line and deadsticking the second line is working well.   Check with Angle resorts on transport options from Young's Bay.  Call ahead for ice road guidelines.  
    • CigarGuy
      With the drifting, kind of hard to tell for sure, but I'm guessing about a foot and still lightly snowing. Cook end!
    • PSU
      How much snow did you get on Vermilion? 
    • Mike89
      lake here refroze too...  started opening again yesterday with the wet snow and wind...  very little ice left today...
    • Hookmaster
      A friend who has a cabin between Alex and Fergus said the lake he's on refroze. He texted me a pic from March 12th when it was open and one from 23rd when it wasn't. 🤯
    • SkunkedAgain
      I don't think that there has been any ice melt in the past few weeks on Vermilion. Things looked like a record and then Mother Nature swept in again.   I'll give my revised guess of April 21st
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