Furnace blows but does not heat (intermittent problem)

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Blueballs is actually just another disgruntled reject that was charged over $100 on a weekend to change his own dirty filter because he was too lazy and stupid to do it himself. Probably due to the fact that he is too fat to step away from the keyboard judging from the amount of blithering posts he has made. Nice and warm here buddy. Have a nice time replacing parts. Bubba
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Are you actually recommending that a homeowner replace their own filter? My God, man, it's a FURNACE! IT COULD BLOW UP! It's got VOLTAGE! You could get ELECTROCUTED!
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Oscar_Lives posted for all of us...

I think it's more along the line of his mental (dis)abilities. Of course IF he has any "guests" they would probably welcome immolation. Think "Bates Motel"
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I've been having the same problem with my heater for the past couple of months. First tech that came asked me what it's doing. Of course while he was here it worked perfectly, so he said he couldn't fix it until he knew what the problem was. Paid him for the service call, but when it happened again yesterday, I called a different company. Both companies have been in business in my town for a very long time. Second tech came and asked what it was doing. Same exact thing, it worked while he was here, though it hadn't worked for the previous 24 hours. He told me the same thing as the first tech, but I said no...I want it fixed. I don't want to keep calling you guys out, pay the service charge, and it's still a crap shoot as to whether the heater will work. He said he would order a retrofit kit for $397.00, and charge me the $80.00 service charge that it would have been yesterday at the time he does that service. OK, fine, but why didn't either one of them suggest that in the first place? Do they really think that I want to keep paying a service charges with no resolution? So techs do ask homeowners questions before they start, and sometimes they don't make the right suggestions either.
Cheri
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Pay for a diagnostic charge. Let them keep coming back until they DIAGNOSE the problem. Then you can pay part and labor. They should honor their diagnostic charge for 30 days. If not find a better company. Why the hell would you pay someone for doing nothing?
-Canadian Heat
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On Tue, 16 Jan 2007 09:13:59 -0800, "Cheri" <gserviceatinreachdotcom> wrote:

Hold it right there Cheri. Why, Why Why would you call another company when you already paid the first company? Call the first company back, tell them it is doing the same thing, you already paid a service call fee yesterday and you would like this problem resolved. Any Professional company is going to work with you on this. You gave the first company no chance at all to fix what it wasnt doing when you first called. Maybe you just like pissing money away?

Fine?? So you do like pissing money away.

At this point since there seems to be no point in continuing since you just like to dump money in a pit Ive got to ask......... How big are your tits? Bubba
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Maybe the highly experienced HVAC professional didn't tell Cheri that he'd come out for free if the furnace failed again.
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he'd
No, he didn't, but part of it is my fault for not checking myself to see if they would.They did bill me, and not ask for money at the time of service. I sent them a check, and decided that when it happened again, I would use someone else since I didn't think they knew what they were doing. The company I am using now does have a six months guarantee, but I'm not sure they know either. I just know that I don't know, and am assuming that the retrofit will take care of the problem for now. I would sooner pay for that than have them keep coming back, waiting around here for hours for them to actually get here, paying a service charge, and then..."I can't find anything wrong with it." I hate having to spend the money, but such is life. I'm old now, and hopefully the retrofit lasts as long as I do. :-)
Cheri
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Bubba posted for all of us...

Don't waste your time - it's Jeffy the cross posting idiot only more angry than most.
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Tekkie Don\'t bother to thank me, I do this as a public service.

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I once had similar symptoms (I have since moved).
I had a condensate pump, and it filled with "gunk" over time. I had a contractor confirm this was the problem. He removed the pump, took it outside, took a hose to it, reinstalled, and the problem resolved. Don't actually know what the failure mechanism was, but this resolved it. It happened again a year later, but I just cleaned the condensate pump again. When I moved, I left a note for the buyers, and included a description for them to rinse out the condensate pump about twice a year.
Don't know if this is the same problem as yours, but thought I'd share my story.
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Actually was looking at the wrong manual before. According to the right manual for my model, the two possibilities are: 1. Low gas pressure 2. Faulty gas valve
Does that make sense and sound right relative to the symptoms I have described?

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blueman wrote:

I suppose anything is possible, but given that the burner starts, neither seems terribly likely (to me).

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Once you take out the stupid philips screw holding down the flame sensor. (purple wire) Clean it with steel wool. Put a robertson screw back in and throw the philips screw out. If there's a condensate sensor in the furnace, orange wire going to what looks like another flame sensor in the black plastic collector box. Just disconnect and tape the end of the wire with electrical tape. It causes problems and it's useless.
-Canadian Heat
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blueman3333 posted for all of us...

Hey Jeffy is this you???? Google hasn't been invented in Jeffys time... He is a lazy, stupid, fundy idiot whom needs his psych meds refilled.
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Newsgroups: alt.home.repair,alt.hvac Subject: FIXED!!!!!: Furnace blows but does not heat (intermittent problem)
--text follows this line--

No thanks to some of the "pros" here, but I fixed the problem myself.
It was a great learning experience -- I learned a lot about furnace drainage and controls. Best of all, I didn't have to hire any of those ARROGANT ASSHOLE types that seem to infest this newsgroup.
Only cost to me was my time -- I didn't asphyxiate myself, blow up the house, or even break anything! Imagine that a stupid homeowner can actually fix something without bowing to the gods of alt.hvac.
In all seriousness, I do want to thank the disgruntled alt.hvac pros because without their bullshit, I might actually have given up and called a tech. But they offered a challenge that I just couldn't refuse.
So, please if you are a handy homeowner, don't be scared off by these nitwits. HVAC repair is far from rocket science -- just a little basic plumbing and electricity. Now to tell the truth, I would probably never take apart a gas connection because that stuff (along with roofing) actually scares me, but the rest is easy -- I mean I was building more complicated electrical control circuits back in grade school. Just remember that the only reason they bark so loud is that they are afraid you may actually look inside an HVAC unit and realize how simple it is and then you may realize that they are just a bunch of overpaid and overpampered high school graduates (if that).
Anyway, enough of the gloat. Here are the details of what I believe went wrong and what I did to fix it in case someone else has a similar problem in the future...
Issue ended up being a problem with condensate drainage (thanks Dmitrios for the hint based on your experience). The actual cause of it shutting off was that the inducer pressure switch was triggered (thanks Tony Hwang).
It Really ended up being two contributing problems. First, the flexible rubber condensate tube leading from the exhaust side of the ventor motor to the internal trap (black plastic manifold where 3 condensate drain lines meet before exiting the furnace) was FILLED with particles -- so much so that the entire line was blocked solid. Some of these particles had also started to clog the trap. I couldn't believe how much crap was there!
Interestingly, despite the clog which presumably had been there for a while, the system still worked until I added the condensate pump last week. In the installation, the last couple of feet of the flexible tubing sloped upwards (after dropping about 20 feet). My guess is that this created a second water trap that aggravated the more proximal blockage within the furnace.
In any case, I cleaned out all the condensate tubing inside the furnace and shortened the final stretch of tubing leading to the condensate pump so that it slopes down almost vertically into the pump tank.
All works PERFECTLY now -- ran the furnace for about 2 hours straight and didn't get a hiccup.
Now contrast that satisfying learning experience with what one might exect calling in a repair man. Based on my experience with the average quality of technicians today, they probably would have first tried to replace everything that moved -- e.g., "lets' try a new pressure switch" or "how about a new ventor motor" etc... This would take at least two visits since they would of course have to go order and get the part. After paying for their marked-up parts and labor, it might actually have worked for a few days or weeks since just replacing the parts might have shaken things up a bit.. But then the problem would inevitably recurr since they wouldn't have fixed the right thing in the first place. Then they would probably come back to the house a couple of more times, each time replacing a new part or so. Finally, they would try to convince me to buy a new furnace since they would then claim that the problem is a common defect with the model with no solution and since it is out of warrantee the only choice is to replace the entire furnace... Sigh... I know the story well and have seen how it ends...
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HAHA you shouldn't have any problem blowing that condensate clear every year!
-Canadian Heat
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| | No thanks to some of the "pros" here, but I fixed the problem myself. |
Just wondering how far you would have got without the advise from some of the more obliging people in here?
I'd get that OCD problem of yours checked.... you do know there is medication for it.... don't you?
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"Justin" <\\> writes:

If you read the post, you would see that I thanked people for their contribution -- even mentioning two people by name.
What I meant is that I didn't need to call in a "tech" which is what about a dozen people felt they needed to say repeatedly in rather foul language.

WTF r u talking about? I thought you had a serious comment...
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posted for all of us...

Oh he KNOWS but he's got a lot more problems than that....
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I have had the same problem with HVAC elitism. The best thing you can do is educate yourself and others about your fix which is exactly what you did. The HVAC elite are more interested in their pocketbook than actually helping the general public.
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