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-   -   Heil GNE075B12 Water in teh tube between combustion blower and pressure switch (http://www.diychatroom.com/f17/heil-gne075b12-water-teh-tube-between-combustion-blower-pressure-switch-60203/)

Quin 12-23-2009 09:17 PM

Heil GNE075B12 Water in teh tube between combustion blower and pressure switch
 
1 Attachment(s)
I have this 7 year old furnace, it's 80+ insngle stage, made by international confort products corp. First 5 years, it runs great. Since last Winter, the rubber tube between combustion air blower and pressure switch constantly has water in it. If the tube is stuffed with water, the furnace is shut down. Once the water is removed, the furnace is back on and works fine. It takes about 3 to 5 days to get water to block the tube. I couldn't figure out where the water comes from and how to stop the water cumulated.
I have enclosed a photo, the red tube has water in it, the black part is blower, and the white/reflecting light, is pressure switch. Should I open the combustion pipe to check it out?

Thanks you for any advice!

hvaclover 12-24-2009 04:10 AM

Do you have a metal chimney that runs to the roof thru the interior of the home.?

Or does it exhaust into a brick chimney and did the installer put a liner in the chimney?

How long is the flue pipe connecting the furnace to the chimney?

Tator1076 12-24-2009 09:03 AM

Yep sounds like you need a Liner.

Tator1076 12-24-2009 09:04 AM

It will cost you big bucks too. Beside it should been code for the company but one in

Tator1076 12-24-2009 09:06 AM

Quote:

Originally Posted by Quin (Post 371400)
I have this 7 year old furnace, it's 80+ insngle stage, made by international confort products corp. First 5 years, it runs great. Since last Winter, the rubber tube between combustion air blower and pressure switch constantly has water in it. If the tube is stuffed with water, the furnace is shut down. Once the water is removed, the furnace is back on and works fine. It takes about 3 to 5 days to get water to block the tube. I couldn't figure out where the water comes from and how to stop the water cumulated.
I have enclosed a photo, the red tube has water in it, the black part is blower, and the white/reflecting light, is pressure switch. Should I open the combustion pipe to check it out?

Thanks you for any advice!


Dam you got a smart valve gas furnace. Good luck with that. Get ready to put out tons of money in the future.

hvaclover 12-24-2009 11:49 AM

Quote:

Originally Posted by Tator1076 (Post 371537)
It will cost you big bucks too. Beside it should been code for the company but one in

A liner is bit pricey but you don't have to make it sound so bad the OP thinks it'll cost thousands. It's in the mid hundreds.

newtech 12-24-2009 12:51 PM

On the back of the pressure switch there is a small hole in it. Is is a vent. Make sure it is not plugged. (with dirt,dust....)

You can try to clean it out and see if it helps. ICP had problems with them plugging up, I have seen this happen way too many times.

I would recommnd getting a new pressure switch even if the cleaning helps.

JohnH1 12-24-2009 01:49 PM

Strange that nothing for 5 years and now only 3 to 5 days for a problem. I agree the possability for a liner but somthing els has changed to cause so much condentation. Has anything changed with the home, chimney or any work on the furnace recently?
Low gas pressure and to high of airflow can also cause similer issues.

newtech 12-24-2009 02:29 PM

As JohnH1 stated. " Low gas pressure high air flow."

Would also recomend checking the temp rise on the furnace.

yuri 12-24-2009 04:09 PM

Downdraft on the off cycle will cause that. Did you add a powerful JennAir cooktop fan or central vacuum or other device which exhaust lots of air.

Quin 12-27-2009 08:10 PM

2 Attachment(s)
Thanks everyone for all the comments, and wish everyone has a great holiday season.

To HVACLover:
I do have a metal chimney that runs to the roof thru the interior of the home. The furnace is in the basement, then it goes through floor1 and floor2, and last the space between roof and 2floor ceiling.

The metail pipe has no insulation, see photo.

To Tator 1706:
May I ask what the liner is?

To Newtech, I could not find the small hole, the only opening for the pressure switch is the rubber tube.

To JohnH1 and Yuri, The only change in my house is a new water tank installed in Sept 2006, and I had this problem Feb, 2008. the flue pipe from the Furnace and the water tank are jointed togather in the basement, see photo 2. Not sure if this caused any problem. Would it be possible the blower has water inside?

Thanks you all again!

yuri 12-27-2009 08:38 PM

How warm is it in your basement? That water is condensation and caused by the water vapor in the smoke condensing inside that tube. If it is below 65F I would think that will cause it to condense faster. That furnace is notorious for that problem.

Quin 12-27-2009 08:47 PM

Thanks, Yuri, I'm checking the tempature now.
do you know what the liner is?
So glad I can have your help.

yuri 12-27-2009 09:15 PM

A liner is used in an old outdoor/outside the house old brick chimney. A single wall pipe which can get cold and have problems. Your chimney is internal and won't get cold, no problem.

Quin 12-27-2009 09:18 PM

The basement currently is 68F, and Thermostat is in floor1, setting is 70F. but in the night, the thermostat is set to be 64.4F, I think the basement should be lower as 62F, therefore, what you suspected could be very true.

Can I put insulation layer to cover the pipe in the basement, or even the pipe underneath the roof?

Or I should increase the night time temparature?

Glad that I can see some lights for my puzzle now

Thank you again!


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