I have a high efficiency HVAC system that puts out a good deal of condensation. Yesterday the pump I use to remove the water started running constantly and not switching off. It also seems to have a hard time removing the water.

The unit is the Little Giant 554425 VCMA-20ULS 115V.

There seems to be some scum build up in the water in the reservoir. Since the units are so cheap I may just replace it. If so I want to upgrade to a stronger unit as I plan to pump the water out into a rain water barrel in the spring.

Is this unit easily fixable or should I replace it.

If I go with a bigger pump (230v) do I need to worry about power supply as it is a higher voltage?

Also, I believe this unit is about 4 years old.