Bosch Avantixx Washing Machine Not Draining

This thread was marked as solved. Here's a summary of the problem and the fix, generated from the discussion below.

Bosch Avantixx not draining full wash load, pump suspected

The problem

A Bosch Avantixx washing machine brought out of storage after four years showed E08 and would not drain during the main drain stage of a normal cycle. The pump made a crackling noise, and the impeller was seen spinning. After the water was manually drained from the front, the machine could then complete the remaining drain/spin with only a small amount of water present. Separate fill/rinse, manual drain and spin tests were reported as working.

Likely cause

The accepted reply said the most likely causes were a partial blockage in the drain path, corrosion or dried limescale/gunge affecting the pump after storage, a sticking plastic ball in the sump hose if fitted, or a drain pump that was weak and not running properly under a heavier water load. The exact cause was not confirmed.

What fixed it

Recommended checks were the drain hose connection, especially any plastic spigot on the u-bend, and the sump hose for blockage or a sticking plastic ball. If those checks found nothing, the accepted advice was that the pump might need replacing. The original poster decided to buy a replacement motor pump and have a technician fit it.

Checks to try

• E08 fault shown
• Pump made a crackling noise during the drain stage
• Impeller was observed spinning
• Machine drained/spun once most water had been manually removed
• Separate fill/rinse, manual drain and spin tests worked
• Suggested check of drain hose/u-bend spigot for partial obstruction
• Suggested check of sump hose and any plastic ball for blockage or sticking

Parts or tools mentioned

• replacement motor pump