Quote:
Originally Posted by Rondo
Since you have a 3721 that indicates to me you have a residential refrigerator and it is running of your inverter which should be plugged or wired into your converter which breaks down your shore power to 120 and 12 volt systems. The inverter runs the power for your frig. If your battery or batteries have been depleted they are toast and will take a charge but won't last so you might as well purchase new ones. If you do not have two batteries you need two. You must replace both of them if they are toast or even if one of them is bad. If you put a new one in and leave one old one it will only drain the new battery down to the level of the old one and you'll have to replace both of them again anyway. If you've solved your problem or found out what the problem was let us know also because it's great to give out advise to someone asking questions but if we don't know if the problem is solved we won't know if it's been taken care of. I hope it has and you are a Happy Camper once again.
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Thanks Rondo. It turns out that a resetable 50 Amp fuse had blown. It was near the battery. Likely blew when we were struggling w/jammed slides. Fuse replaced. Battery fully charged; and holding. So far, so good.