Water pumping in very slowly and uneven flow

If the water pressure coming out of the steam/hot water arm is fine, then the issue is likely with the brew unit or the grinder. Here are a few things you can check:

1. Clean the brew unit: A dirty or clogged brew unit can slow down the flow of water. Remove the brew unit and clean it thoroughly, making sure to remove any coffee residue or buildup.
2. Check the grinder: A dull or clogged grinder can also slow down the flow of water. Make sure the grinder is set to the appropriate setting for your coffee beans and check that the grinder is not clogged.
3. Check the water flow meter: The water flow meter measures the amount of water flowing through the machine. If it is clogged or damaged, it can affect the flow of water. Try cleaning the water flow meter with a soft-bristled brush and see if that helps.
4. Check the water filter: If your machine has a water filter, it may be clogged and affecting the flow of water. Replace the filter if necessary.

If none of these solutions help, it may be a more serious issue and you may need to bring your machine to a professional for repair.

Check the water flow coming out of your water valves on the wall. Once in awhile a faucet washer comes loose in the valve causing "flutter". Check the flow through the hoses before they get to the washer.

You need to advise the model .. but assuming its the CVA 40XX series ... the frist thing to check is the dispenser which has the two pipes comming out of the bottom. This can get coffee residue build up which usually causes 1 or both pipes to have reduced coffee flow. Indication that this is at fault are if the flow is uneven between the pipes or if coffee flows down the outside of dispenser. You can chck this pipework for blocages by openeing door and blowing air though the pipe extending on inside of door. The the dispenser is blocked you need to remove from rear of door and then clean out thoroughly in running water. If this pipework is not and

You need to advise the model .. but assuming its the CVA 40XX series ... here is what I would do;
1. First check is the coffee dispenser on front which has the two pipes coming out of the bottom. This can get coffee residue build up which usually causes one or both pipes to have reduced coffee flow. The indication that this is at fault is if the coffee flow is uneven between the pipes or if coffee flows down the outside of dispenser. You can also check the dispenser for blockages by opening door and blowing air though the pipe extending on inside of the door. The air should flow through easily. If the dispenser is blocked you need to remove from rear of door and then clean out thoroughly in running water.
2. Next check the pump and water path. The pump for the coffee is also used for producing hot water. So if the hot water is working normally then you can rule out the pump. If you not getting hot water then its likely to be the pump or a blockage in the flow through water heater.
3. If above OK then it's a fault with Brew Unit. Follow procedure to remove the brew unit, clean unit and test the air path through both pipes by blowing. Note: When you take out brew unit it not possible to access one of the pipes because its protected by a plastic shield. There is a manual procedure to manipulate the brew unit to expose this pipe so you can blow through it. However the likely cause is not a blockage in these two pipes but the stainless steel filter that the coffee must pass through. You will need an Allen key to remove the bolt holding this in place. Once removed you need to check all holes are free of blockage by inserting a very small wire in each hole. Alternately you can replace this part. If the filter is clogged then you should consider using a different type of coffee as some types coffees cause this problem and others do not.
I hope this helps. regards

Since you already replaced the heads, check for engine block cracks or uneven mating surfaces with the heads.

It could be the metering jets in the grouphead and or flowmeters. Try pressing both buttons at the same time to see if they give you the same volume and time.

some cars have a bleeder at the highest point you open and fill car slowly until you see water or coland flowing from bleeder .sometimes can take a whil e to get all the air out be patient with it

Check for kinked or clogged water supply hoses(s). Be sure to make sure that if there is a screen-like filter in the supply hoses or at the inlet on the wash machine, that it is clear.

Shut the water supply off. Start the washer to fill on warm wash / rinse to relieve the water pressure in the hose. Shut off the washer. Unscrew the hose connection from the washer and direct both hoses into the washer tub (or other container). Turn the water supply on. Both hoses should discharge water evenly and forcefully, then shut the water off. If the flow was uneven, slow or poor - clear obstructions in / or replace the hose(s). Next, inspect the water inlet on the washer. Clear any obstructions, dirt, etc. Reconnect the hoses and try again. If flow is still lacking, there may be obstructions in water lines or valves INSIDE the machine.

I hope this helps - please rate my reply. Thanks.

Check the diffuser and screen, try swapping them around to make sure that is the problem. If that is not he problem then the tubes from the exchangers need to be descaled.

first I would check your drain pump.. you may have something blocking the water flow... this will cause the water not to fully drain and your machine will have a out of balance load...a loose belt will just slip and make noise,,,

there is a panel in the back you can remove to check the drain pump...let me know if this is helpful...