A: No you cannot interchange theses filters. the WHEERF filters are made for the WHER25 system and the WHEEDF filters are made for the WHED20 system. Answer provided by:  Janice Seltzer (8/30/2013)

A: Battery Change 1. Loosen the screw on the right side of the faucet base. 2. Press the battery housing upwards from faucet base until it releases from the base. 3. Replace the battery (CR 2032 or equivalent). Place battery into the holder with the positive (+) side facing the back of the holder. 4. When the battery is first replaced the light in the base will flash six times and turn off. This indicates the battery is fully charged. After the six flashes the timer enters the 6 month time cycle. If it repeatedly flashes two times, the battery is weak and needs to be replaced. 5. Re-install the battery housing and firmly tighten the mounting screw Answer provided by:  Janice (3/29/2013)

A: The production of this item has not changed. It sounds like you may have an O ring stuck in the system. The little rubber gaskets that are on the connections occasionally remain in the system preventing you from having secure, snug fit. Please check you old filter when removing and see if the gasket is still intact. Answer provided by:  Janice (6/11/2013)

A: I have never let the water run that long after replacing the filters. Usually after a couple of days of normal usage, the water comes our normally. It sounds like the issue is around taking out the tube from the spigot (I am assuming it is the spigot) My line is blue. I have not found a way to reuse the tubes once pulled out from the connection. I didn't find any guidance on this so if anyone has ideas, I would like to hear about it. I found that my spigot lasted about 2 years and I changed it. It was very easy to change. All you have to do is cut the tube and reinsert in the new spigot. great system. Answer provided by:  Adrian (2/7/2013)

A: It could be a number of things that is causing this problem. A link for the user manual has been provided below and may help you trouble shoot the problem. You can also call Ecodyne for technical support. http://www.ecodynewatertreatment.com/workspace//uploads/product-documentation/7278646eng_t.pdf Answer provided by:  Janice (7/16/2013)

A: at the bottom of light there is a small indent take a screwdriver and pick the light up and it will come out the battery is attach to this Answer provided by:  william (3/29/2013)

A: Grip the battery between your thumb and forefinger and pull. If you can't get a good grip, use pliers with light pressure on the battery. Answer provided by:  Matt (3/29/2013)

A: I have used this for 3 years, and not had that issue. I would say there is air in your line somehow! Check the hose under the sink to make sure it is not twisted. Sorry I could not be more help to you. Answer provided by:  Joan (2/8/2013)

A: If this happens after you changed the filters, you might have air trapped in the system. The solution is to keep using it and the air will eventually work it's out of the system. Answer provided by:  Adrian (2/7/2013)

A: You may have Air in the line or filter. I've had the same problem, but it usually goes away with normal use over a day or so. Answer provided by:  Craig (1/15/2013)

A: I installed the new filters as in the past and, for some reason, the water had a strange taste to it. When I called Whirlpool, they suggested I try reversing the filters and it worked like a charm. So, it may not actually matter which positions the filters are in as long as all works well. Answer provided by:  linda (2/10/2014)

A: Yes, it should be installed as per instruction. I think the filters have numbers on them. 1- is the first filter then the 2 will be the last filter. Answer provided by:  Adrian (2/7/2013)

A: Yes, there is an order to installation. If you read on the front of the filters, they are labeled "filter 1 and filter 2". Facing the unit, filter 1 goes on the left and filter 2 goes on the right. Filter 1 should be the first filter that the water enters. Hope this helped. Answer provided by:  James (11/14/2012)

A: One of the filters says number 1 somewhere on it and the other one says number 2. On the top of the base under your sink it will also say 1 & 2. You just need to match them up, Answer provided by:  Kevin (11/10/2012)

A: The WHEEDF are the replacement cartridges for the Whirlpool WHED20. The WHEERF are the replacement cartridges for the Whirlpool WHER25. The WHER25 is a reverse osmosis system which basically turns hard water soft. The WHED20 is a water filtration system which basically removes contaminants. These filter sets do completely different things. Answer provided by:  Janice (10/29/2012)