Hotpoint WMAQF641 Pump not working

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

Hotpoint WMAQF641 not draining; pump runs out of machine but not when refitted

The problem

Hotpoint WMAQF641 Aquarius showed an F15 error and then stopped draining/spinning, leaving water in the drum. The drain pump impeller had stopped in normal use. The pump was removed and tested outside the machine, where it ran, but when refitted it did not propel.

Likely cause

The accepted reply says F15 does not clearly match a pump fault on this model range. As the pump runs out of the machine, the strongest supported diagnosis is a supply fault to the pump in the machine, such as no power reaching it or a neutral return fault. A weaker possibility mentioned is a weak pump motor that spins unloaded but lacks strength under load.

What fixed it

No confirmed repair was documented. The accepted advice was to suspect the pump electrical supply/return rather than immediately blaming the pump or controller, and to assess whether the pump is weak when running outside the machine. The exact repair was not confirmed.

Checks to try

• Observed F15 fault being displayed
• Machine would only sometimes continue after stopping and restarting on spin + drain
• Pump propeller stopped and machine retained water
• Pump removed and tested outside the machine, where it ran
• Accepted reply questioned whether F15 was the correct code for a pump fault
• Suggested checking whether the pump is weak under load