Before you call that plumber, Here are a couple of tips to try to solve the problem yourself. Or at least save your basement from flooding until a professional can get to your home.
Tips that will help you fix and diagnose why your basin is overflowing:
1. Tap the discharge line coming out of the sump pit. “Sometimes” when I would tap the line very gently with a rubber mallet the primary submersible pump would turn on. Why? because the float switch on an automatic would stick due to corrosion on the top metal rod that activates the motor. If this does work then wait till the basin is empty to see if you can locate the cause of the failure. If their is no obvious reason why the submersible pump failed, you should still replace the pump. If it happened once it will happen again and you may not be home when it does.
If that does not work, then try this:
2. “Power” Check the fuse box to see if you have blown a fuse. If you have blown a fuse then reset the breaker by turning the breaker off then back on again. Or, you can plug in a light in the outlet where the sump pump is plugged into to see if you are getting power. If you are getting power then hurry up and replace the pump if you can or call a professional plumber. Do not stick your hand in the basin when the pump is plugged in, if their is a short in the wire then you may be electrocuted.
If that does not work either, then try this:
3. Unplug the motor and put your hand down in the basin until you reach the pump. Feel around the sump pump to see if you can feel any debris stuck near or on the submersible pump. If so, then gently dislodge the object. After you have removed the object, simply lift the float switch to make sure it is going up and down properly. Quickly plug the pump back into the outlet so you don’t flood.
I hope these tips will aid you in saving your basement from flooding. You may want to consider getting a backup pump for more security.