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Old 12-17-2009, 09:24 PM   #16
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HELP- Lennox Elite Series Furnace # M/N 90UGFA3-75-5


Here is a pic of my furnace exposed...So what from all you guys are telling me this is what I want to do...Tell me if I am on the right track:
1. Disconnect power supply. Is it also neseccary to cut of gas?
2. Disconnect rubber hose & boot from left of vent motor to drain (have small bowl) & clean line.
3. Remove Fan motor (4 screws) disconnect electrical clip (white wire) just below and remove green ground wire above. Drain Fan and clean.
4. Now that I have more accesss there is a white pvc line under motor I want to remove drain and clean this line and other to the right of the black plastic nipple (clean this too) behind gas line (I have a closeup of this area- looks like some corresion or rust present).. not sure if this stuff is glued together or not...
Let me know what you think if I missed anything or ways to make job better.
Thanks
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HELP- Lennox Elite Series Furnace # M/N 90UGFA3-75-5-dsc04863.jpg   HELP- Lennox Elite Series Furnace # M/N 90UGFA3-75-5-dsc04860.jpg  

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Old 12-17-2009, 09:26 PM   #17
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HELP- Lennox Elite Series Furnace # M/N 90UGFA3-75-5


FOLLOW these instructions exactly. I do this procedure about 2 dozen times a winter
1) Get a couple of towels and place them under the small black hose that drains the big pipe that exhausts the furnace.
2) Shutoff power to furnace
3) Carefully pull small black hose from rubber boot that exhaust pipe attaches to and carefully remove it from the 2"rubber cap fitting on the right side. be careful as some water may come out, have a small jar ready to catch it
4) Take the small hose to the sink and flush all the crap from it by running hot water to it
5) There is a barbed fitting where the hose attaches to the rubber boot on the exhaust pipe. Remove it and check for crud in it
6) Reassemble everything and start furnace
7) No need to remove and drain ventor fan. Usually has enough power to spit the water out and now that the drain hose is clear the water will drain into the trap, may sound like it is laboring but it usually gets up to speed in a minute and throws the water out. If you remove the fan you will wreck the gasket behind it and need to call a Lennox dealer and /or will have a water leak later.
8) Leave the trap alone as it usually does not plug up
9) BE Very careful not to break the barbed elbow the hose attaches to the trap with

Last edited by yuri; 12-17-2009 at 09:33 PM.
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Old 12-17-2009, 09:31 PM   #18
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HELP- Lennox Elite Series Furnace # M/N 90UGFA3-75-5


What about the 2"rubber cap fitting on the right side? It looks like its full of crud or corrosion? Do I touch this? Also sounds like the fan is gruggling should I remove fan?
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Old 12-17-2009, 09:36 PM   #19
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HELP- Lennox Elite Series Furnace # M/N 90UGFA3-75-5


Reread my post I added info to it. Leave the 2" cap which is a trap alone as the spring will break and you will have all kinds of problems with water leaking later. I only clean them if the first procedure fails. Rare that they plug up. Leave the fan alone as it can throw the water out itself. If the motor gets hot shut it down, let cool off and retry a 1/2 hr later.

Last edited by yuri; 12-17-2009 at 09:38 PM.
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Old 12-17-2009, 09:38 PM   #20
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HELP- Lennox Elite Series Furnace # M/N 90UGFA3-75-5


Yuri
One last thing I noticed water is pooling under the fan...Just checked and waited and can see a drip from bottom of fan motor at screw...this gruggling tells me there is water in fan housing right? Shall I remove and drain... or will your procedure above correct this problem??
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Old 12-17-2009, 09:41 PM   #21
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HELP- Lennox Elite Series Furnace # M/N 90UGFA3-75-5


I guess a young buck like myself jumped the gun...should have read your second post as it aswered my questions...I will follow your instruction in post #17.....For my eduation is this caused from build up over the years?
I really appreciate you taking the time to assist me!....
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Old 12-17-2009, 09:43 PM   #22
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HELP- Lennox Elite Series Furnace # M/N 90UGFA3-75-5


The water may have built up to the shaft of the motor level and there is no seal there for that. Once the water is spit out the problem goes away. The gasket behind the fan may be leaking but you would have to get one from a Lennox dealer if he has an extra one. Comes with a new fan and not something you can make yourself. My procedure, reread both posts works all the time. Make sure the motor does not get too hot and let it cool off to be safe. I can tell by the sound of it spitting water how to burp it but I have done it many times. Achiles heel of that furnace.
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Old 12-17-2009, 09:45 PM   #23
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HELP- Lennox Elite Series Furnace # M/N 90UGFA3-75-5


Slow down, a bit. This old guy can't type that fast. LOL. Lack of maintenance, that hose needs to be cleaned every year. Bugs fall in the exhaust pipe over the summer, die and turn into crud and plug the hose. There is a complete new exhaust pipe conversion kit but it is expensive and a Lennox guy would have to install it for you. Clean the hose once a yr and you should be okay.
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Old 12-17-2009, 09:47 PM   #24
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HELP- Lennox Elite Series Furnace # M/N 90UGFA3-75-5


Ok got it Yuri...I will follow your instruction and see how it goes. I will keep you posted- check out this thread in a day or so to see if I need you to throw me a life line! Again thanks for your help
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Old 12-17-2009, 09:49 PM   #25
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HELP- Lennox Elite Series Furnace # M/N 90UGFA3-75-5


Great thanks! Hey how is the weather in Winnipeg? Getting cold over here but only half as cold as what you guys get!
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Old 12-17-2009, 09:49 PM   #26
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HELP- Lennox Elite Series Furnace # M/N 90UGFA3-75-5


Us Canucks have to stick together eh? Went from -30C last week here to -11 today. Hard to get used to at first. Was -40 in Edmonton, better them than me/us. LOL.
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Old 12-17-2009, 10:03 PM   #27
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HELP- Lennox Elite Series Furnace # M/N 90UGFA3-75-5


u have to call a lennox dealer.This kit involves cutting exhaust vent to install! pls don't...call .

Last edited by beenthere; 12-17-2009 at 10:12 PM. Reason: Not sure if promoting or bashing named company
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Old 12-17-2009, 10:06 PM   #28
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HELP- Lennox Elite Series Furnace # M/N 90UGFA3-75-5


Please do or don't call ? This board doesn't tolerate promoting or running down and naming service providers.

Last edited by beenthere; 12-17-2009 at 10:12 PM. Reason: Removed company name to be safe
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Old 12-17-2009, 10:16 PM   #29
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HELP- Lennox Elite Series Furnace # M/N 90UGFA3-75-5


If someone is asking if you know of a local company(I might have to recheck that with Nathan though).Naming a company is ok. If you have no affiliation/interest with that company.

Other then that. Don't grab free advertising.
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Old 12-17-2009, 10:16 PM   #30
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HELP- Lennox Elite Series Furnace # M/N 90UGFA3-75-5


Quote:
Originally Posted by yuri View Post
Please do or don't call ? This board doesn't tolerate promoting or running down and naming service providers.
Would agree.did nt mean to go there...!

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Last edited by beenthere; 12-17-2009 at 10:26 PM. Reason: Removed company name
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