Purchased old house with submersible water pump well. Previous owner just used well to pump water to above ground holding tanks and then by gravity watered his garden. We have done the same. However, this year when we went out to turn on the well we had a problem. Problem: When we hold up the lever on the pressure switch the pump starts to pump the water into the holding tanks. As soon as we let go of the lever everything stops. Pump won't keep going to fill the tanks without us holding the lever. Do we just need to replace the pressure switch. The pressure on the gauge reads 30 lb at rest and when holding the lever will pump up to 55 lbs. Thanks for any advice. Connie