What brand of water heater is in my RV?

Check the label on the water heater tank or access panel. Common RV water heater brands are Atwood (now Dometic), Suburban, and Dometic. Your RV owner's manual will also list the brand and model number. Knowing your brand helps you find the right replacement parts and understand common failure points.

How long should an RV water heater last?

With proper maintenance (annual anode rod replacement and tank flushing), an RV water heater lasts 10-15 years. Without maintenance, tank corrosion can cause failure in as little as 5-7 years. The anode rod is the key — it's a $30-$60 part that protects a $400-$1,200 tank.

Can I use my RV water heater while driving?

Electric mode is safe while driving if you have an inverter or generator running. Gas mode should generally be turned off while driving because wind can extinguish the pilot flame and propane appliances near the road present safety concerns. Most RV owners heat water at camp before and after driving.

⚠️ Safety Notice

RV water heaters involve propane gas and 120V electrical systems. Before any repair work, turn off the heater, shut off propane at the tank, and disconnect shore power. If you smell gas, leave the area immediately and call 911.

RV Water Heater Problems: Find Your Symptom, Fix It Fast

Quick Answer

Most RV water heater problems are caused by tripped breakers, empty propane tanks, corroded igniter electrodes, or low thermostat settings. Check these four things first — they solve 80% of water heater issues in under 10 minutes.

Your RV water heater can fail in dozens of ways, but every failure traces back to one of four systems: electrical, gas/propane, thermostat controls, or the tank itself. This hub organizes every water heater guide on RV Tech Lab by symptom so you can jump straight to your fix. Start with the pillar guide if you're not sure what's wrong, or pick the specific symptom below.

Symptoms

RV water heater symptoms fall into a few categories: complete failure (no heat, no ignition, display dark), partial failure (works on gas but not electric, or vice versa), performance issues (slow heating, lukewarm water, inconsistent temperature), and physical problems (leaks, rust-colored water, strange noises). Each symptom points to a different root cause. Complete failure usually means an electrical or control board issue.

Partial failure points to a mode-specific component like a heating element or propane solenoid. Performance issues often trace to thermostat settings, sediment buildup, or a failing anode rod. Physical problems demand immediate attention to prevent water damage.

Start Here: Full Troubleshooting Guide

If you're not sure what's wrong with your water heater, start with the complete troubleshooting guide. It covers every failure mode from no heat to leaks, walks through quick diagnostics, and helps you determine whether you can fix it yourself or need professional help. This is the most comprehensive resource on the site for water heater issues.

Water Heater Won't Work At All

If your water heater is completely dead — no display, no ignition, no response to controls — the cause is almost always electrical. A tripped breaker, dead battery, or failed control board tops the list. This is the most common complaint and usually the easiest to fix.

Water Heater Not Heating

If the heater turns on and appears to run but water stays cold or barely lukewarm, the problem is usually a failed heating element (electric mode), a clogged burner orifice (gas mode), or a thermostat set too low. Mode-specific failures are common — try switching between gas and electric to narrow it down.

Pilot Light Won't Stay Lit

A pilot light that won't ignite or won't stay lit is usually caused by a corroded igniter electrode, a failed thermocouple, or inadequate propane flow. Electrode cleaning is the most common DIY fix and takes 10 minutes. If cleaning doesn't help, the DSI board or thermocouple likely needs professional replacement.

Preventive Maintenance

The best way to avoid water heater problems is annual maintenance: inspect and replace the anode rod when half-corroded, flush the tank to remove sediment, clean the igniter electrode, and check all connections for corrosion. This 30-minute annual routine prevents the most expensive failures — tank corrosion and element burnout — and extends the life of your heater by years.

Frequently Asked Questions

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Last updated: 2026-02-19