Water pump "pulses"

I think OPs pump is cycling when USING the bathroom sink faucet and the outside shower....not cycling when everything is closed.

Pump stays running when using other faucets.

Mine did that while showering due to flow restricting shower head. Solved it by putting in a 2 gallon accumulator tank. Solved a second problem we didn't know we had. Now we can flush the toilet all night without the pump (under the bed) from coming on to wake up the spouse.

Folks -- problem solved, at least for now. I took apart the bathroom faucet, removed the flow constrictor, put it back together, and all is well. The interior shower works fine, now, too, even though I didn't do anything to it. I haven't tackled the rear outside shower head, but I strongly suspect the same situation. I never use it, so it's not a high priority. I did haul out the documents for the pump, and was prepared to do scary things with an adjusting screw, but no need. And I learned about accumulator tanks, which I'd never heard of, but which show up in the pump documents as an option.

Thanks, all!

Rich