Maxi 210 help needed please

Hi all. I have a maxi 210 that worked fine up until Saturday. I usually turn it on an hour before I need it and it does the job ok. I’m running a bitter and a lager through it but it’s started to play up.
It runs for about 10 minutes then switches off, it used to to run for much longer and kick in and off every so often when it needed to.
I took the re-circ pipe off and nothing came out. Does this mean the pumps knackered?
Is th pump tha same as the agitator?
I’m new to this so not sure where to start to try and fix it. Any help greatly appreciated.
Thanks

is it building up an ice bank? (should be able to check by looking into the fill hole)

If it is, and its just an issue with the recirc pump then that can be replaced. Rather than like for like, i replaced mine with an aquarium pump that served it well for two years.