Mobile RV Water Heater Repair in Central Texas
An RV water heater that stops producing hot water, leaks at the tank or connections, or fails to ignite on LP or electric is a disruption that gets worse the longer it goes unaddressed. Boss Bull provides mobile RV water heater repair across Central Texas, coming to your location to service the affected unit on site.
Every repair, no questions asked.
Better Business Bureau accredited.
$500–$25,000. 0–35.9% APR based on creditworthiness.
Austin and Central Texas.
Overview
RV storage water heaters operate on LP, electric, or both — the DSI (direct spark ignition) models require the control board, ignitor, and gas valve to work in sequence for LP operation, while the electric element provides a backup when shore power is available. Failure on one side does not always mean failure on both. Identifying which mode is not functioning and why is the first step in a water heater service call.
Anode rod condition is one of the most deferred maintenance items on RV water heaters. The sacrificial anode protects the tank interior from corrosion — once the anode is depleted, the tank begins corroding from the inside. Sediment and mineral buildup from the Central Texas water supply also accumulates at the tank bottom over time, reducing capacity and creating a habitat for bacterial odor. Periodic anode and sediment service significantly extends tank service life.
We service Dometic (formerly Atwood), Atwood legacy units, and Suburban water heater models. Common repairs include DSI ignition component replacement, gas valve service, anode rod replacement, T&P valve replacement, tank drain and flush, electric element replacement, and bypass valve correction. When a tank has developed a leak at the seam or port fitting, unit replacement is typically more practical than seam repair — we discuss the options before any work begins.
Water heater access door opened during a service visit. The tank, burner assembly, and anode rod port are inspected before diagnostic work begins.
Opening the access door is the first step on every water heater call. Burner condition, igniter position, and anode rod port access are all confirmed before any LP or electrical testing begins.
Common Problems We Fix
- No hot water on LP — unit does not ignite or shuts off during the heating cycle
- No hot water on electric — element not heating on shore power
- Water heater ignites but water never reaches adequate temperature
- Leak at the tank, drain fitting, anode port, or T&P valve
- Sulfur or rotten-egg odor from hot water outlets
- Bypass valve in the wrong position after winterization — no hot water delivery
- T&P relief valve dripping or discharging
- Water heater has not been serviced or the anode replaced in several years
Water heater data plate documented during a service visit. Model number, capacity, BTU rating, and manufacture date are recorded before any repair work begins.
The access door was opened to photograph the data tag before beginning the diagnostic. Recording the exact model and specifications prevents part ordering errors when a component replacement is needed.
Common Findings During RV Water Heater Repair Service Calls
Water heater service calls most often involve ignition system components, anode condition, or bypass valve position. The following conditions appear most frequently.
- Bypass valve in winterization position — most common cause of no-hot-water calls after spring de-winterization
- Depleted anode rod — fully consumed, exposing the tank to internal corrosion
- Sediment accumulation at tank bottom — reducing capacity and contributing to sulfur odor
- DSI control board or ignitor failure — stops LP ignition sequence after the spark electrode fires
- Gas valve failure — LP not delivered to the burner after DSI ignition fires
- T&P relief valve fouling or discharge — valve no longer holding a seal
- Electric element scale fouling or burnout — reduced electric heating efficiency or total electric element failure
- Tank seam or port fitting leak — typically found at the drain fitting, anode port, or T&P valve port
Technician Observations
What Owners Commonly Report
Presenting complaints we hear most often on these service calls.
- No hot water — the water heater does not seem to be doing anything
- Hot water runs out very quickly — tank not holding temperature
- Water from the hot tap smells like sulfur or rotten eggs
- Water heater is leaking at the access door area
- I just de-winterized the RV and now I have no hot water
- The T&P valve is dripping
What We Frequently Find
Actual conditions we document when we arrive on site.
- Bypass valve left in the winterization position — one of the most common reasons for no hot water after de-winterization; the bypass diverts cold water around the tank so the system can be blown out with air, and when left in that position the tank never fills
- Depleted anode rod — the sacrificial anode is designed to be replaced periodically; RV owners rarely know it exists until a sulfur odor or a tank leak prompts a service call; a fully consumed anode leaves bare metal at the port and the tank exposed to internal corrosion
- DSI control board or ignitor failure — the direct spark ignition sequence requires a functioning control board, a spark electrode with adequate gap, and a gas valve that opens on command; failure at any point stops LP heating
- Sediment accumulation at the tank bottom from Central Texas mineral-heavy water supply — reduces effective capacity, accelerates tank corrosion, and is the most common cause of rotten-egg odor in hot water lines
- T&P valve fouling or failure — the temperature and pressure relief valve can begin to weep from mineral deposits on the seat; replacement is required when the valve is actively discharging
- Gas valve failure on older LP units — the solenoid-operated gas valve degrades over time; a valve that sticks or fails to open interrupts LP delivery after the DSI spark fires
- Electric element burnout or scale fouling — the electric heating element accumulates mineral scale from the water supply; heavily scaled elements produce less heat and eventually fail
Service Recommendations
What we typically advise based on our findings.
- Anode rod inspection and replacement on a regular service interval is the single most important preventive maintenance item for extending tank life — confirm the anode condition at least every two years
- Rotten-egg hot water odor almost always means the anode is fully consumed and the bacterial colony is active in the tank sediment — a tank drain and flush combined with a new anode resolves this in most cases
- Confirm bypass valve position as the first step after any de-winterization before concluding the water heater has a mechanical fault
- T&P valve discharge should be investigated immediately — a dripping T&P can indicate elevated system pressure or a valve that has lost its seat seal and needs replacement
Why RV Owners Choose Mobile RV Service
- Hot water is restored at your location — most water heater service calls are completed on the first visit without a shop drop-off
- Anodes, T&P valves, and common ignition components stocked on the service van
- Service at RV parks, campgrounds, storage facilities, and residences across Central Texas
- Post-winterization de-winterization and bypass valve confirmation included during seasonal service calls
- Service across Central Texas including Austin, Georgetown, Round Rock, Cedar Park, Kyle, Buda, and surrounding areas
- Financing available through Wisetack for water heater replacement and plumbing system repairs
Water Heater Brands We Commonly Service
- Dometic (formerly Atwood): WHN-6A, WHN-6E, and WHN-10E LP/electric storage water heaters
- Atwood: legacy 6-gallon and 10-gallon DSI LP/electric units
- Suburban: SW-6DE, SW-10DE, and SW6P LP/electric storage water heaters
- Dometic and Suburban DSI control board and ignitor service
- Anode rod replacement on all compatible storage tank units
- T&P relief valve replacement
- Bypass valve inspection and correction post-winterization
- Electric heating element replacement and descaling
- LP supply line and regulator pressure verification as part of water heater diagnostics
Related Services
Brands We Service
Service Areas
Frequently Asked Questions
What Our Customers Say
“Our camper AC went out and we called Rich on a Saturday, thinking no way we were going to get someone out on the weekend. But Rich came out that afternoon, took a look at the unit and came up with a solution.”
“He went into great detail telling me what was wrong (even showed me) and what would need to be done. He is very responsive, respectful and efficient!”
“Prices are fair. They communicate well. They show up on time. They do what they say they will do. I will never use someone else.”
Ready to get your RV back in service?
Schedule mobile RV repair across Central Texas, or call and talk to a tech now.