I have an Igloo Cooler which plugs into my vehicle’s cigarette lighter outlet, which is governed by a 20 amp fuse. The cooler has performed superbly over the years, until this year when it immediately blew the 20 amp fuse and then a 25 amp fuse on my auxilary power outlet. The people at Igloo suggested that sometimes sudden power surges from the vehicle itself occur and that this would be shown to be a likely cause of my problem if the Igloo still performed with the same power cord plugged into a converter that uses household current. We tried this and the Igloo worked through the course of an entire night.
The mechanic at my auto repair shop, investigating the problem, came to the conclusion that I needed a new Igloo. He had plugged the Igloo into his own vehicle and it repeatedly blew the fuse. Imagine my surprise when I took the plug of the power cord apart and discovered that it contained its own 5 amp fuse and that this fuse was intact! Can you explain the anomaly of a cooler blowing 20 and 25 amp fuses while leaving a 5 amp fuse intact, and if so can you suggest any way of continuing to power my Igloo from my vehicle?
Second question (unrelated): My tires recommend inflation to 41 psi, whereas GM, inside the driver’s side door, recommends inflation to 35 psi. Whose recommendation should I follow?