The Progressive Dynamics PD4135 converter I installed in my trailer last
fall had some issue with the fan control. The fan was running constantly at significant speed with the converter under no load.
I emailed PD about this, they said this was not normal, it is covered by their warranty, and they sent me a new converter section, free of charge!
No hassle, no arguing, as simple as that!
Very good customer service at Progressive Dynamics, I was impressed!
Took me about 10 minutes to swap the converter section, and now everything works as it should!