Upright freezer

I have a Montgomery Ward upright freezer that the compressor only comes on for a few seconds then stops. I am wondering if one this old is worth fooling with. It is 20 years old. And if it is, I am guessing that there is a relay switch some where that needs to be replaced.
Any suggestions?

Thanks- Fred

I hate say it but, Let it go, At 20+ years old a repair would be RISKY at BEST!!!