What is wrong next to my pressure washer? I keep the unit stored surrounded by my basement to avoid freezing...

I keep the unit stored surrounded by my basement to avoid freezing temps. When I tried to use it today it would build up pressure until I pulle the trigger. For 1 second it would be a full power and the unit would not generate any more pressure.

Excell 2500 model.
Answers:    I would check the pump. Have you be using it with low water pressure, or letting it run near no water turned on? I would think solitary holding pressure for 1 second would indicate worn pump valve or broken spring.

Good Luck
Possible the spring that controls the valve that allows pressure to build, consequently releases it may need to be replaced.