Water filter will not lock? Do those locking mechanisms break?

Hi,

I don’t know the model but looking at the parts for your model, it seems that the water filter is held in by a water filter cap which locks into the water filter housing (part #WP2186443)

This link has a video that shows how to replace the filter, which you already know but it shows how the cap fits over the filter and locks into the filter housing. The link above for the housing has a video that shows how to replace it, if it is the problem.

If the cap is the problem (broken? missing?) then it comes in 3 colours, white (part #WP2186494W), bisque (WP2186494T) and black (WP2186494B).

If you need either a new filter housing or filter cap, search online using the part number only to find suppliers that suit you best.