Lead solder was banned for water long before electronics.
Doesn't change the fact that there are millions of people living in those homes drinking the water and doing fine. Fears of lead are more paranoia than substance.
My fridge doesn't blow any air over the food. Any nasty lead solder used is isolated from the food. The pipes in the freezer compartment are covered in paint and the pipes round the back don't touch the food.
You have a fanless fridge ? must be a small one. Coils in the freezer sections of most refrigerators are not painted , they are aluminum soldered to copper and the fan pulls air across the coils to cool the air in the non-freezer section. Whether it is lead or an alloy solder depends on the manufacturer. External copper coils are brazed not soldered.
Another career that involves lots of lead is stained glass work, the artists are not suffering from lead poisoning and they handle it all day long in large quantities.
The main thing to remember about lead is don't eat it and don't convert it to a powder and inhale. There are a lot more dangerous things in electronics than lead. Flux fumes being 1000X worse.