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.
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.
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.
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.
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.
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.
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.
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.
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.
When upgrading your Suburban KT30 furnace to the 521099 circuit board, you need to properly connect the flame sensor circuit to get continuous spark ignition instead of just one spark. The new board requires different wiring than simply grounding the old flame sensor wire.
Everything you need to know about RV plumbing systems from fresh water supply to waste management.
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.
Replace Atwood GC6AA-10E with Dometic G6A-8E - its the same heater under new branding. Dometic acquired Atwood so mounting patterns and connections should match directly.