RV air conditioners freeze up due to restricted airflow, dirty filters, low refrigerant, or thermostat issues. Turn off the AC, let ice melt completely, then clean or replace the air filter and check for blockages.
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.
When your RV furnace blows cold air but won't ignite, the problem is usually a dirty flame sensor, blocked air intake, faulty ignition board, or gas supply issue. Most ignition problems can be diagnosed and fixed with basic cleaning and component checks.
Unfortunately, you cannot replace just the tank on a Suburban SW6P water heater - the tank and outer housing are manufactured as one integrated unit. When rust appears during flushing, it's time to replace the entire water heater.
Atwood 90029 mixing valve has internal O-rings that deteriorate during storage. Can attempt rebuild with new O-rings, but full replacement often better choice after 8 months sitting. Valve is reasonably priced and straightforward to replace.
Furnace running 5-10 minutes then quitting usually indicates overheating from restricted airflow, weak flame, or failing control board. Check combustion air intake, propane pressure, and burner flame quality. Control board becomes suspect if other tests pass.
When your RV propane furnace clicks but won't light, it's usually caused by a dirty or failing igniter, blocked air intake, low propane pressure, or faulty control board. Most issues can be resolved by cleaning the igniter, checking propane supply, and ensuring proper airflow.
To add electric heat while keeping the anode rod, look for kits that install in the drain port or use a combo anode/element. Avoid kits that replace the anode port entirely on cast iron tanks. The anode is critical for tank longevity.
Furnace rumble and backfire indicates air-fuel mixture problems. Check gas pressure at manifold, deep clean burner by soaking, and inspect heat exchanger. Delayed ignition from weak spark or dirty igniter also causes this. May need replacement on 20+ year unit.
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.
When a Suburban RV furnace only works on battery power but fails to heat on shore power, the issue is typically a converter providing incorrect voltage (13.8V+ instead of 12V) to the control board. The solution involves checking voltage levels and potentially adjusting or replacing the converter.
For a 2002 Born Free with Suburban SF-30 furnace, choose the complete furnace replacement over just the core. While cores cost less, complete units include updated components, better reliability, and easier installation for DIYers.
Your Coleman 9420-381 thermostat has failing solid-state switching components causing voltage drop during heating calls. This is a known issue with this model - replace it with a more reliable thermostat or return to a mechanical relay-based unit.
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.
Your Suburban SW6D water heater likely has a combustion air intake blockage or ECO switch issue preventing proper airflow. The problem occurs because the unit needs adequate combustion air to maintain the flame safely.