TLDR
- RV water heaters average 8 to 12 years - hard water shortens the lifespan
- Rust flakes, no hot water, or sulfur smell are the top warning signs
- Anode rod replacement every 12 months extends tank life
- Tankless conversions cost more but never run out of hot water
- Call 772-276-6465 for diagnosis and replacement quotes
An RV water heater is a 6-gallon tank running on propane or 120V electric, and like any tank, it eventually corrodes from the inside out. In Port St. Lucie, where municipal water has noticeable hardness and the salt-laden air from the Atlantic accelerates external corrosion, water heaters die faster than the manufacturer specs suggest. Here are the five signs that tell you it is time to replace, not repair.
Sign 1: Rust Flakes in the Hot Water
Open a hot tap into a clear glass and let it run 30 seconds. Brown or orange flakes mean the tank lining has corroded through. Once the porcelain or glass-lined interior fails, no anode rod will save it - the tank is going to leak through the wall within months.
We see this most often on rigs from owners who never replaced the anode rod. A $30 anode rod every 12 months extends tank life by 3 to 5 years. Skip it, and Port St. Lucie's mineral-heavy water eats the tank wall from the inside.
Sign 2: No Hot Water from Either Heat Source
Suburban and Atwood tanks run on both propane and 120V electric. If neither produces hot water, the issue is usually the gas valve, the heating element, or the thermostat - all repairable. But if the tank has visible exterior rust around the burner tube or weld seams, replacement is cheaper than chasing failures.
Our water heater repair service diagnoses the system on site. If it's worth fixing, we fix it. If it's beyond saving, we quote replacement.
Sign 3: Sulfur or Rotten Egg Smell
Hot water that smells like rotten eggs is sulfate-reducing bacteria reacting with the magnesium anode rod. The fix is a full system sanitization (chlorine flush) and switching to an aluminum-zinc anode rod. We handle both during a single service call.
If the smell returns within weeks, the tank itself is harboring biofilm in pinhole corrosion sites - replacement is the only permanent fix.
Sign 4: Visible Leaks at the Tank Base
Pull the access panel and inspect the tank from underneath. Any active drip, water staining on the floor, or rust streaks running down the tank wall means the tank has perforated. Once perforated, the tank cannot be welded or sealed - replace it.
Water damage from a leaking heater is the fastest way to ruin a sub-floor. Our water damage signs guide shows what to look for elsewhere in the rig.
Sign 5: Pilot Light or Burner Issues
If the propane burner won't light, cycles on and off rapidly, or makes a popping sound on ignition, the gas valve, thermocouple, or burner tube has failed. These are repairable parts, but on a tank already 8+ years old, replacement makes more economic sense. We carry Suburban and Atwood replacements in the truck for same-day service across PSL, Tradition, and St. Lucie West.
For a fast diagnosis at your home, storage lot, or campground, request a service call or dial 772-276-6465.