"30W" skrev i en meddelelse
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When replacing caps is there any thing special to look for. I know it
has to have the same capacitance, voltage, and temp is there something
else?

The Application - If the capacitor needs to handle ripple currents as in a
switching power supply, or a snubber circuit, it needs to be rated for it.
Safety Capcitors need to be UL rated, etc.

Also what are your opinions on using a higher voltage cap than was
originally used?

Should be fine - if they are the same "technology"; i.e. it would be bad to
replace a polypropylene cap with a ceramic because the polyprop is there for
it's stable properties, while the ceramic is cheap.