How to DIY it: Coils are located on the back of the refrigerator or across the bottom. Pull the fridge away from the wall. (Hint: Grab the sides and pull from the bottom. You may want to lay cardboard on the floor first to prevent scratching.) Clean coils with a coil-cleaning brush (about $10 at home centers), then vacuum. Do this every six months or so.
Generally, in the United States, there are few legal issues if an unpaid homeowner works on a project within their own home, with some exceptions. Some jurisdictions require paid handymen to be licensed and/or insured. New Jersey, for example, requires all handymen who work in for-profit businesses serving residential and commercial customers, to be registered and insured. Often handymen are barred from major plumbing, electrical wiring, or gas-fitting projects for safety reasons, and authorities sometimes require workers to be licensed in particular trades. However, minor plumbing work such as fixing water taps, connecting sinks, fixing leaks, or installing new washing machines, are usually permitted to be done without licensing. Many handymen are insured under a property damage liability policy, so that accidental property damage from negligence or accidents are covered.
How to DIY it: This job can be messy, so protect nearby surfaces by covering them with plastic or cardboard. Spray the springs with garage door lubricant (about $7 at home centers). Don’t use oil, grease, or other lubricants. They may be cheaper, or you may have them on hand already, but they won’t work as well and tend to pick up dust and grit—just what you don’t want on moving parts.