P38A Brake issue

I just had my rear calipers replaced a couple of weeks ago and a full brake bleed to replace the old fluid. I am noticing that each time I switch the ignition on now that the brake pump runs for a lot longer than it use to. It always use to run for a couple of seconds but now it is close to a minute and basically every time the ignition is turned on. The brakes are working fine and the pedal is firm. Any ideas what may be causing this?
Cheers

Sounds like air in the modulator.

3? Bleed nipples on the modulator, they need doing in turn and the book needs to be followed precisely

kermit_rr said:

3? Bleed nipples on the modulator, they need doing in turn and the book needs to be followed precisely

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+1 ^^^^^^