Need a little help on electrolytic caps

[Jim in Idaho]

I did something stupid and left my step-up, step-down, adjustable buck converter out in the shop all winter. It was exposed to temps near zero (f). It now has problems, and I'm wondering if the caps may have frozen. They look OK, but that doesn't mean much. Any help greatly appreciated. I have not removed them, or tested them yet.
Jim

[WM6]

It was exposed to temps near zero (f). It now has problems, and I'm wondering if the caps may have frozen.

Jim

Electrolyte in caps can froze.

But main problem is that froze lead to no longer seal the gasket and thus leaking electrolite.

[Jim in Idaho]

Thanks, WM6. I haven't seen any leakage yet, but haven't looked at them closely.
Jim

[WM6]

I haven't seen any leakage yet,

Jim

It is not like visible fluid leaked, electrolite disappear in air throug no more sealed part of ELCO.
Electrolite carier "insulator" between C plates inside ELCO dries out.

[Jim in Idaho]

Now THAT I hadn't thought of! I guess I'll order some new caps and see if that solves the problem.
Jim

[WM6]

Now THAT I hadn't thought of! I guess I'll order some new caps and see if that solves the problem.
Jim

Most probably ELCO caps are issue in old units. But first clean all removable contacts, like IC sockets and alike.

[Jim in Idaho]

Good idea! I did that last night, and it seemed to be working OK. I also sprayed the whole thing with electrical cleaner. Had considerable dust on it, and maybe got some humidity that caused problems. Really appreciate the help.
Jim