The description of your converter is a little vague. Are you talking about the converter that provides the DC power for your trailer lights and auxiliary equipment. Before you decide on at new converter, I would suggest that you check you battery first. The converter will generally keep your battery charged and even freshen it with an equalize charge. If it's a wet battery, make sure that the cell electrolyte is up to the mark in each cell. If during your inspection, you find any cell/cells dry or the plates exposed then your battery maynot be taking a good charge. Add demin water to any cell below the mark. Disconnect your shore power and then your battery from the trailer circuit and charge it with a ordinary 10 amp charger. Watch for any excessive bubbling.10 ampchargers aregenerally two stage in that when thebattery is charged, the charger willdrop to a floatmode and provide a trickle charge. When thecurrent is about 2 amps, disconnect the charger and reconnect thebattery to the trailercircuit.
If your battery is a sealed valve regulated battery then the only thing you can do is measure the voltage and monitor for excessive temperature buildup.
You haven't indicated how old your trailer is but if it's less than two years and is a Crossroads product and the converter is defective then it should be a warranty issue.
Helen & George VE3INB and Max (Bichon Frise)
2006 Silverado 2500HD D/A,
2006 Cruiser CF30SK