Aqua-Hot 400D dual-fuel prep

Use the official Aqua-Hot 400D product page to collect dual-fuel model and heating or hot-water support details.

Owner-safe checklist

Record the Aqua-Hot 400D model, serial details, controller state, hot-water symptom, cabin-heat symptom, energy-source selection, and RV make and model.
Save photos of the visible label, controller, owner-visible status lights, purchase paperwork, and recent maintenance records.
Use Aqua-Hot, an authorized service center, dealer, or qualified hydronic service for diesel equipment, fluid loop, installed power, parts, or repair decisions.