If your Rinnai water heater is producing a sulfur-like smell, it’s likely due to bacteria in the system reacting with the magnesium anode rod. This reaction can produce hydrogen sulfide gas, which has a distinct rotten egg or sulfur smell. Flushing the system and replacing the anode rod can often resolve this issue. However, if the smell persists, it may indicate a more serious problem that requires professional attention.
Our experts at 5 Star Best Plumbing are well-versed in water heater repair and can help diagnose and resolve any issues you may be experiencing with your appliance.