We can hear the timer on our three year old Grundfos hot water recirculating pump humming. However, the motor itself is not turning. Two questions:

1. Can just the motor be replace, or must the entire pump be replaced?

2. We have had the pump plugged into a three prong grounded remote so we can go to the window and turn off the pump when we go to bed or out for an extended period. Would using the remote cause the pump motor to fail?

There is a large "crew-like-cap" in the middle of the pump. Unscrew it. Few droplets of water will drip out. Once you remove this "screw", you will expose shaft or the rotor. It should be turning. If it is not, than take screwdriver and push it inward and turn in clockwise. Rotor should start turning. Screw back in the large "screw". That should do. Let me know how you did. Back to you. Milo

My Grundfos hot water recirculating pump is red. It has a large gray Grundfos name plate (bigger than a silver dollar) on it. I do NOT see a "screw-like-cap".

Is it under the name plate? If so, how do I remove the name plate?

Look better, every pump has it . It is a Bleed Screw. See the pic. Back to you. Milo

Ok, so using your picture I was able to pop the Grundfos plastic name plate off (it had just 4 little tabs).

Now, I am looking at a solid metal unit where the name plate was. Sorry, No screw.

When you popped off the plate, does it have hole in the middle ? Like 3/4"-1" large ?

Yes it does!

Great, so that tells me there should be a removable large screw in the middle of the pump rotor that accepts flat screwdriver. Look closely again.. Back to you

The opening is the size of a quarter. It is VERY smooth - no screw slot. I tried to gently pry it off without any xuccess

It should go... It may be just pushed in and holding in on O-ring... take skinny flat screwdriver and try it again...

Here is better pic of that screw...

Thanks for your effort. However, I tried and tried and even bent my screwdriver. But, the cap just will not come off.

Can u take a picture of it and post it ?
Or is there a model number you could post for me so I can look it up ?
Back to you...

How do I attach a photo?

P/N 59896288 Mod. CS-1

That's a Production Number...
The model # should read something like : UF-1528

To attach photo:
1. click on "Go Advanced"
2. click on "Manage Attachments"
3. click on "Browse"
(look up your pic.. )
4. click on "Upload" and wait few seconds for pic to upload
5. click on red bar "SUBMIT Answer"

Here are the pictures"

Can you read for me the "TYPE- UP ................. / TLC " info ? It is not legible. Thank you.

Up15-10su7p/tlc

Ok, I read the instructions. It is retrofit pump with Comfort valve installed somewhere in your bathroom under the sink. There is no bleed button. ( you bleed it by simply opening hot water faucet anyplace in your house )

First, I would try to PUSH that middle button INWARD. See if it goes.

Since you cannot remove that middle "button" than you will have to take the pump apart. You do so by closing water and unplugging electrical. Remove 4 HEX screws. Once the rotor is exposed, clean it, flush it and reinstall it. Spin it by hand. It should turn easily and freely. It most likely got stuck on a small piece of debris that prevents it from turning. Then, reinstall the rotor and body.

Don't forget: you HAVE to turn water and electrical OFF before you touch anything.

Back to you / Milo

Thank you. I pushed the button but nothing occurred.

So, taking it apart will be a project for another day.