Originally Posted by Airperson
Does an o6 classic have a three way fridge?
Some refrigerators have the 3-way feature or the ability to add it. It is not commonly found on trailers since running it on 12v
demands a lot of the 12v
system. It is easier to provide a dedicated 12v
line to the fridge in a motor home and the fridge needs to know the engine is running to select that mode or it can quickly deplete the batteries. This can be done in a trailer, but requires a little more than the standard wiring found on the typical model. Some years ago (many, now that I think about it) this was a selling feature on some trailers, one could safely cruise the highways all day long with the gas turned off and still keep the ice cream frozen back in the trailer! In some cases the trailer manufacturer didn't provide adequate wiring or the tow vehicle couldn't provide enough current to the trailer to run the fridge and keep the battery charged. If the fridge continued to run off the trailer battery when the vehicle was stopped, it could run the battery down in short order.
Modern refrigerators are better at keeping stuff cold enough for longer periods. Some trailer manufacturers still off a 3-way fridge as an option or you can buy one as a replacement, just beware of the power requirements.