While there's no direct plug-and-play replacement for the Atwood GC10A-4E with a gas-only tankless unit, you can upgrade to dual-fuel tankless heaters like the Girard GSWH-2 or Truma AquaGo. These maintain electric capability while providing instant hot water and better efficiency.
Extra pedestal outlets may share breaker with your 50A - check before heavy use. Electric tankless heaters need more power than 20A outlets provide. Use for small appliances only.
Tankless RV water heaters lose significant efficiency at high altitude - about 4% per 1,000 feet. Above 4,500 feet, expect reduced output and possible flame failure. Consider traditional tank heaters if you frequently camp in mountains.
You can replace your Atwood 10-gallon water heater with a Furrion tankless model, but it requires significant plumbing and electrical modifications. The Furrion Tankless Water Heater (FTH-1215) is the most compatible option, typically costing $800-1200 plus $500-1000 for professional installation.
Keep your RV comfortable in any weather with this AC, furnace, and heat pump troubleshooting guide.
Everything you need to know about RV plumbing systems from fresh water supply to waste management.
Oasis tankless needing daily reset likely has a control board relay issue. As a workaround, install a timer to auto-cycle power each morning, or plan control board replacement.
Girard II tankless requires different wiring than DSI tank heater. Run new 10 gauge 12V power with 30A fuse. Do not reuse old DSI harness. Follow Girard diagram exactly for proper operation.
Several companies specialize in rebuilding Oasis RV heaters, including RV Parts Country, Suburban Manufacturing, and local RV repair shops. You can also attempt basic repairs yourself or consider upgrading to a newer heating system.
You can remove a Dometic 10-gallon water heater from behind the refrigerator by creating temporary access through the exterior compartment or carefully maneuvering connections from the front. Most cases don't require refrigerator removal with proper technique.