Model #GNE075B12G1 ICP Furnace/Heater, Gas

  • Cabinet Assy
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Question and Answers

Q:

Kenmore furnace stops working because water is collecting in the rubber tube

A:

I am sorry that you are having some difficulties with your furnace especially during this cold weather. I did some research and I was able to find a link with a similar question. I am also adding a second link in where you can set service to have your furnace repaired by a certified technician. I hope this helps with your furnace troubles while you wait for your expert response.

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Joseph P. -
December 17, 2012
A:

Thank you for your question. Since water vapor is a byproduct of combustion, we can assume that between the inducer motor and the chimney exhaust, there is a problem. It could be the liner, or it could be in the flue exhaust itself. If the exhaust was not run properly, the gases could be slowed enough to where condensation forms and makes its way back to the inducer and pressure switch/tubing. I have a handful of questions about the furnace and the installation that will help determine what the problem might be. Either way, the problem is most likely not with the furnace and never was.

Is this furnace installed horizontally or vertically and if so, which direction does the air flow? Right to left or left to right? If it is installed horizontally, where is the pressure switch located? The pressure switch has to be in a particular location for horizontal installations.

Does the chimney serve an open fireplace or have any other appliances vented into it? What size vent pipe is used for the length between the furnace and the chimney? Does the vent pipe ever at any point dip or sag? If you can post a picture of the vent, that would be helpful as well.

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Andrew D -
Sears Technician
December 19, 2012
A:

Thank you for your reply. Now what is confusing to me is the furnace worked well for several years and now we can't determine how the condensation keeps getting in the tube. A liner and flue where installed recently by me and not back in 2003 when the furnace was installed. Neither fixed the water problem though. The furnace is vertical and air flow is on the right. We have a wood burning fireplace (haven't used this season) and hot water heater share the chimney. We replaced the vent pipe across te basement ceiling to try to solve the issue and it never sagged. Couldn't get pic to post. Again, I have to empty the tube daily now. I don't know what to do next?

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Leah S -
December 20, 2012
A:

When you replaced the vent pipe; did you replace it with double wall b-vent piping or single wall pipe?

Is the furnace installed in the basement and or is it near the washer and dryer? If so, is the dryer vented outside?

What is the humidity level like where the furnace is installed? If it is high, that might be the reason.

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Andrew D -
Sears Technician
December 20, 2012
A:

We had double wall piping already and replaced it with single wall vent piping. It didn't solve the problem and the single was hot. We re-installed the double wall pipe. The furnace is in the basement and 4-5' from the washer & dryer. The outside furnace tube empties in the same floor drain as the washer. The dryer vents outside. We live in Missouri so I wouldn't describe our winters as humid. Do you work in MO?

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Leah S -
December 20, 2012
A:

Can you take a picture of the pressure switch as it is installed along with the inducer motor? I ask because if the pressure switch is installed lower than the inducer, or the pressure switch tubing is sagging because it is too long; water can accumulate in the tube and cause the nuisance trips. The pressure switch should, if anything, be draining back to the inducer housing. When I was looking through the manual there are pictures of the pressure switch that appear to be installed in a way that could cause a problem.

Ideally, the pressure switch bracket should be mounted to the top of the cabinet with the tubing running downhill towards the inducer.

Also, do you see any light rust buildup on the cabinet anywhere or possibly inside the furnace, namely on or around the bracket that supports the pressure switch?

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Andrew D -
Sears Technician
December 20, 2012
A:

No visible rust. Attached 2 pictures.

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Leah S -
December 20, 2012
A:

That makes perfect sense. You have the chimney kit on your furnace. That and your pressure switch is installed incorrectly. For one, the pressure switch tubing is too long. The heat is condensing and settling in the pressure switch tubing which has a major loop in it.

The pressure switch bracket is installed incorrectly. If you're looking at the picture, those two holes that aren't being used need to be the ones used for mounting. You can see it in the picture that I returned to you. In the installation manual, which you can access at the link below, shows on page 9 what I am talking about. The image on the right on page 9 shows the installation when using a masonry chimney kit. You may also have to cut down the length of the pressure switch tubing but take care not to cut it too short. If you kink it even slightly, you'll have a completely new problem.

See right side image on page 9

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Andrew D -
Sears Technician
December 21, 2012
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