My GE Water Filter system (uses two FOSLF GE filters) is making a high pitch sound when the valve is open and the water flow is lower then it used to be. Can you help me pinpoint the problem? Thanks, Dan.

If your Bosch Highflow 21e hot water system is experiencing fluctuations in water temperature while showering, it could be caused by a few different factors. Here are some possible reasons for this issue:

1. Flow rate too high: The hot water system may not be able to keep up with the demand if the showerhead or tap is allowing too much water to flow through. This can cause the water temperature to drop suddenly. Try reducing the flow rate by turning down the tap or using a low-flow showerhead.
2. Water pressure fluctuations: If the water pressure in your home fluctuates, it can cause the hot water temperature to vary. This can be caused by various factors, such as other appliances using water at the same time, or changes in municipal water supply pressure. Installing a pressure regulator or a flow restrictor may help to stabilize water pressure.
3. Blocked or dirty water filter: A clogged or dirty water filter in the hot water system can restrict water flow, causing the water temperature to fluctuate. Check the filter and clean or replace it if necessary.
4. Malfunctioning thermostatic mixing valve: The thermostatic mixing valve (TMV) regulates the water temperature in the hot water system. If it's faulty or dirty, it can cause temperature fluctuations. A licensed plumber or technician can inspect the valve and replace it if necessary.
5. Faulty temperature sensor or control board: If the temperature sensor or control board in the hot water system is faulty, it may not be able to maintain a consistent water temperature. A technician can diagnose the issue and repair or replace the faulty component.

If you're unsure about how to diagnose or fix the issue with your hot water system, it's best to contact a licensed plumber or technician for assistance.

It is probably the water passing through some restriction such as a valve or maybe a T or 90. If this is correct changing the water flow will change the pitch and it will be absent when there is no water flow.

If that doesn't change or eliminate the high pitch sound I do not have a clue.

Sounds like filter is clogged. Replace filter.

This is proabably not the case but I have seen it happen, Have you checked the outlet side of the filter to make sure it was drilled when it was made. Thank you

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...

Hi .. I would first check the supply valve at the washer to be sure that it is open. if it is open , you can check the flow by shutting it off, removing the supply hose, opening the valve slowly and observing the flow. You might need a small bucket here. If you have water flow here at the washer supply valve, then the problem is inside the washer control.

According to the symtoms...sounds like you have a problem with the flow control valve. If less than 3 yrs old, contact Rheem Customer Support at (800-432-8373) and they can an authorized tech in your area to service the unit.

If the unit is out of warranty, I reccommend you still call customer support to find a local technician. Unless you're highly technical/mechanical, this is not a problem you should attempt yourself.

Thanks for trying Fixya.com

Mike...

To replace the filter cartridge. Do the following;
1. Assuming that you have a pump in your water filter
system, shut it off.
2 Close the intake valve before your filter system.
3.To relieve the pressure, open the faucet after your
filter system. Any of your faucet for that matter.
4.Once the pressure is relieved, you can of course
replace the the filter cartridge.
the filter cartridge

The red button is a pressure relieve valve. If the system is leaking from the valve, try pushing the valve up from the underside of the cap where the valve is located. If this does not work the housing needs to be replaced. You do not have to replace this with a name brand like GE. All you need to do is make sure the housing that you are purchasing is the same size.

Example of Replacement Filter Housing: http://www.freshwatersystems.com/c-107-filter-housings.aspx

FreshWaterSystems.com: The Water Super Store: 1-877-335-3339

I solved the problem! The system's manifold (the plastic base you put the filter in) has small black conical shape button. When you tight the filter in, one of the two small triangle-shaped cams (located close to the filter's central hole) pushes the manifold's button, and this opens the water flow. The problem is that the cams are too low and do not push the button all the way in. Take a pliers and squeeze (not too much!) the cams, so they will raise a little: it will be enough to push the button to open the flow completely.