Question about General Electric GE SmartWater Household Water Filtration System - GNWH38F

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I recheck all the connection, but there is no water filtering out. whatever coming out is very little drops.

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I need you to be more specific on what trouble you are having please. I also would like to know how old your unit is. Thank you

Posted on Sep 17, 2010


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Posted on Jan 02, 2017


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Theres a thin metal pipe hanging from ceiling & hovers over a funnel top pvc pipe. There are drk green & brown dry splashes on the pvc pipe. Drain pipe has a strong mildew smell but idk what pipes for

Hi LaTrice:
Tankless water heaters are essentially little gas fired furnaces that heat water, not air. When natural gas burns, a by-product of the combustion is water vapour. Since the furnaces are very efficient, the exhaust gas temperatures are relatively low, and as they go out the duct, they drop even more and the water vapour present condenses and runs back down to a capture device so that it does not dribble all over your floor.
This drain pipe is supposed to go to your sewer (or building drain) and is also supposed to be protected by a TRAP that needs to have a minimal amount of water present to prevent sewer gases from coming back into the room. In hot dry weather, these traps can dry out as there is not as much condensation present.
It could be that when the unit was installed, it was connected by way of a trap that did not have a means of staying primed.
Hope this helps.
RBO (Retired)

Jul 28, 2015 | Rinnai Water Heaters

1 Answer

How to change a water filter on a Noritz tankless water heater

Turn off your incoming cold water to the tankless. (you should probably do the same with your hot water out line just in case). find the black cap that screws sideways into the cold water connection on the bottom of the unit. unscrew the black cap. the filter is supposed to be attached but it almost always comes off. grab a screw driver and stick it in the hole that the black cap was covering. angle it and drag the filter out. you may end up putting a hole in the filter this way but it doesn't matter if you are replacing the filter anyways. once you pull it out make sure you have a little rubber washer on the new filter or else transfer from the old one. the new filter should actually attach itself nicely onto the black cap so once you've removed the old one all you have to do is screw the black cap/filter combo piece back onto the cold water connection and you're done.

I suppose I should mention you will want to have a bucket under the pipes and everything because your unit will empty all the water that was in the unit out of that hole.

Apr 13, 2013 | Noritz 6.9 Gallon Residential Tankless...

1 Answer

Error code e2. inlet water temp sensor. any one have to fix this?

Before calling service technician, open following link for Bosch troubleshooting resources, including error codes, manual, Bosch contact info, and service bulletins.

Error codes are starting point for troubleshoot.
e2 is cold water temperature sensor fault.
Bosch error code says: 1) Check connector on wires coming from top of water valve for a secure connection.
2) Sensor may trip if water temperature drops below freezing to protect heater from freezing conditions Any damage due to freezing conditions is not covered under warranty.

Another contributing cause can be temperature thermostat set very high and tankless sensor is going bad, and very cold incoming water, or combination of factors above.

Also read manual for advisories and required maintenance. Some units require water filter be cleaned monthly.

Upvote the help.
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May 28, 2011 | Bosch AquaStar 2400ES-NG

1 Answer

We are getting A7 error on Bosch 2700ES. Is our water too cold going in? We are in on well water system in Alaska. Do you have any solutions on how to get it to come back on?

Here is the A7 code for this heater:

Outlet temperature sensor fault

(Temperature below freezing or

above 210°F).

1. Check red wire connections at hot water temperature sensor.

Clean terminals with an eraser. If badly corroded, replace sensor

and wire harness. See Fig. 65, page 48.

2. Sensor may trip if water temperature drops below freezing to

protect heater from freezing conditions. Any damage due to

freezing conditions is not covered under warranty.

3. Clean inlet filter screen and clear any debris out of shower

heads, faucet aerators and whole house filters.

4. In areas where water has a high mineral content, periodic
descaling may be necessary.

I would be very surprised if your water temp is below freezing, even in Alaska, check it with a thermometer. Well water is usually around 45 degrees F.
Let me know,

Dec 22, 2010 | Bosch 2700ES-NG Natural Gas Tankless Water...

1 Answer

We also installed the water filter GXWH40L. We never had any issues and have gone through probably five replacement filters. We recently changed the filter and have horrible water pressure. We changed it...

If you have GATE valves on either side of the filter make sure the have opened all the way. They can become unscrewed and although it seems like it opened they gate can be almost closed. If the outside spigots are on hard water try the pressure there.
Water filters for pre-filter housings come in different micron ratings. They can be anywhere from .5 micron on up to 100 micron. The smaller the number the finer particulates it filters out and the faster it will plug up. Generally most filters used for residential households are 5 micron to 50 micron rating and the most common used are 10,30 or 50 micron. Try a 30 or 50 micron filter to see if it helps. But remember the larger the micron rating the more particulates pass through.
If there is a lot of sediment coming the well and building up in the bottom of the pre-filtet housing you may want to flush the well or consider having the well inspected by a well company. You could have a pinhole in the drop pipe that is letting sand in.
Run one of the outside spigots in to a clean white bucket, let the pump cycle several times and inspect for sediment in bucket, let it settle for about 20 minutes to see if excess sediment is coming from well. Have your water tested to see if the water chemistry has changed also.

Dec 07, 2010 | General Electric GE SmartWater Household...

1 Answer

My 32E Bock Oil Water Heater will not fire up. What is the gap between the little lighter fingers? Or whatever you call them? We got it to fire once but then it went out again shortly. We have checked...

Hello You have a clogged oil filter or oil line.The (electrode) gap should be left ALONE.The line needs to be blowin out & replace the filter element then the flameout will stop.

Sep 03, 2010 | RTO Bock Water Heaters 32E 32 gal 104,000...

1 Answer


The pressure tank psi may be too high. To set it you get the system to pressure up and stop then check that water pressure. Whatever that is, is what the tank should be set at. Too much air pressure and the water pressure will suddenly drop before the pump kicks in.
To set the tank properly turn off the pump, drain all water pressure, then set the air pressure in the tank to the same as the water pressure was. Turn it back on and check again.

Apr 14, 2017 | Water Heaters

5 Answers

GE smartwater filter (model GXRLQR) stopped!

These replacement filters (GXRLQR) are FLAWED straight out of the factory. The problem is in the 2 little "teeth" nubs that stick up near the center circle of the filter. When the filter is twisted and inserted, these teeth push up on a tiny black spring loaded valve in the body of the filter, alowing water to pass through up and out the spigot. The flaw is that the "nubs" are too short and do not push open the spring valve far enough, reducing flow to a semi-trickle, even with a brand new filter. GE seems to think this is not a problem.

Solution=stick a $0.25 garden hose rubber washer in the top of the filter and screw it in. You may have to try a few times to get it to work and seat properly. When it works, you'll immediately get a nice super flow of water. Better than upgrading to a $200 filter system recommended by GE...

May 06, 2010 | General Electric GE SmartWater Household...

2 Answers

Water Heater Keeps Going Off

is there a check valvle on hot water side of heater,a flow restriction of some sort, water pressure to the heater, a filter in the line, line pressure in the heater kicks out burner, when you turn on the water, line pressure drops, heater comes on, when you turn on water in other part of house, heater should not fire, so there has to be a check valve somewhere,in heater?

Jan 24, 2010 | Noritz 6.9 Gallon Residential Tankless...

1 Answer

Temperature drop

Is there problem with the in coming water to this unit?

Mar 10, 2009 | Water Heaters

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