Hot Wash

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

Bosch WFL 2450 will not fill on 90°C wash

The problem

A Bosch WFL 2450 washes normally on cool programmes, but on a 90 degree wash nothing happens apart from the hot inlet valve humming.

Likely cause

The accepted reply indicates a hot water supply issue rather than a confirmed internal fault: the hot tap may be turned off, the hot fill hose may be kinked, or there may be no hot water flowing through the hot tap/hose.

What fixed it

Check the hot water supply to the machine, specifically that the hot tap is on, the hot fill hose is not kinked, and hot water is actually flowing through the hot tap and hose. No confirmed component replacement or completed repair was documented.

Checks to try

• Observed that cool washes work normally
• Observed that on a 90 degree wash the hot valve hums and the machine does not fill
• Check whether the hot water tap is turned on
• Check whether the hot fill hose is kinked
• Check whether hot water runs through the hot tap and hose