I have a Bosch SHU9955UC-12 dishwasher that is about eight years old (I think). It seems the recirculation pump is clogged or weak. It sounds a bit like it has lost its prime, but it does circulate water. It doesn't have enough pressure to spray water more than a few inches out of the lower spray arm. There do not seem to be any clogs before the pump, but there may be one after it. The drain pump works fine. Any suggested fixes?

While I was tricking the door latch into thinking it was closed (so I could see the pump's flow), I messed it up. It won't latch closed now as it just bangs up against the fixed point at the top of the D/W opening. It thinks it's closed even though it won't close now. How do I take access the latch assembly to fix it, too?

I ordered a new pump. I would have just ordered the rebuild kit, but the plastic housing is crumbling, too. The total cost of the housing and rebuild kit was close enough to a new pump for me to order the whole thing.

I cannot figure out, though, how to remove the old pump housing (the part connected to the sump and the heater inlet). I have a service manual, but it does not describe the procedure for removing that part. If I pull on the housing, the flexible rubber couplings just bend. I don't want to force anything. How do I get that part out? Will I need to replace those rubber parts when I do this?

This is the part I'm trying to remove: Part number: 935626

A wrap-up:

I was able to replace the circulation pump successfully. Here are some things I figured out along the way. Since I found other posts here asking the same types of questions as I did and also not getting any responses, I hope this will help future repair efforts.

Use a digital camera to take pictures of electrical connections, screws, etc. Turn off the flash and use the camera's macro mode, which is usually shown as a tulip icon.

Use a muffin tin to hold screws and small parts in the individual cups. I wrote notes and step numbers on scraps of paper in the cups. For example, all the screws that secure the door face went into a cup with a note that said, "door face."

The easiest way to get to the pumps and heater is to remove the tub, as described in the service manual. I purchased a PDF one from this site: AllRepairManuals. One thing to note, however, is the steps necessary to remove the tub omitted a key step: Remove the two screws at the base of the rear of the tub, too. The manual only described the screws at the front of the tub. It is also worth noting that the clips that secure the door hinge pivots do not come out with downward pressure from a Torx driver as described. I had to apply pressure outward to the clip while gently prying the U-shaped channel open slightly before the clip would release.

The pump's inlet and outlet are secured by friction and the one-time use hose clamp on the outlet. I cut the hose clamp off and was then able to carefully work the pump from the soft rubber connectors. There was a thin O-ring on the pump's inlet that I transferred to the new pump. I installed the new pump by gently working the rubber connectors onto the inlet and outlet hoses. I replaced the hose clamp with a narrow adjustable one purchased at the local hardware store.

After reassembling the base, the tub, and the door, I connected the water lines and power to test for leaks. After confirming everything worked as desired with no leaks, I put the side panels back on and reinstalled the unit under my counter.

Total cost of the repair, including manual, pump, and shipping was less than $150.

Super useful information. Wish I had seen this before I replaced my pump. A couple related pieces of information.

In another post, the poster noted that some hoses were brittle with age - and cracked when reinstalling. I had same issue, but forewarned had ordered the two hoses. These are Bosch PN 361113 and 263099 (I have a SHY66C05). You disconnect and reconnect both these when installing the new circulating pump. My 361113 was also brittle and I could not get it reinstalled. Plastic deformed when I tried to reinstall. Swapped for new, which went in like butter. Other hose I did not end up needing.

The one time use hose clamp: this can be reused, but take care not to deform it taking it off. I had slightly damaged mine, reassembled my washer and it leaked from this connection. Then found that my local hardware store did not have narrow clamps, rebent mine to close to original condition, re-installed, and luckily it worked. If I knew that I was going to re-use it, I would have been more careful getting it off.

Totally agree with muffin pan. 10-12 different kinds of screws across the different steps.

Also handy to have a dedicated T-20 torx driver. Had a multi-head driver with torx, but shaft was too fat to fit in opening to remove front kick plate support. Caused me to go to hardware store before getting 5 minutes into the disassembly.

Also another poster had put up the Bosch "Dishwasher Service Training Manual" in .pdf. Search "Bosch dishwasher low pressure". It's one of the post with the longest thread. This plus YouTube videos of the various steps really make the process more do-able.