I have a grundfos pump CH2 - 40 which I have used for nearly 10 years without problem.
I notice recently that the pump does not switch off automatically like what it ised to be and the water is hot even at night when the pump is not switching off automatically. It seems like at times the pressure switch work and at times not.
What should I do? Can I ask anyone to check/repair or I need to replace the pump?
Thank You.

Thank you for the reply.
The pump is hot when I touch it and today there is a small leak at the connection but when I off the pump and on it back the leak stops. The overpressure may have caused the leak.
Who should I contact then. Not all plumber knows about water pump.
My option is to seek feedback from the bigger hardware shop that sells grundfos pump but they may ask to replace the pump instead.
TQ.