Manual-backed troubleshooting
RV Water Heater Troubleshooting: What to Check First
Tank and tankless units, standing-pilot and direct-spark ignition, and gas-only versus gas/electric models use different controls. Identify the installed system, record one normal-control response, and then use the exact manufacturer guide instead of selecting an internal part.
Safety first
Leave immediately if you smell propane, a propane or carbon monoxide alarm sounds, you see smoke or soot, or you smell ammonia. Do not operate switches, appliances, fans, phones, or other ignition sources. From a safe location, call 911, the fire department, or your propane supplier. Do not return until a qualified professional says it is safe.
Things you can try first
These checks use normal controls and owner-accessible areas. Stop immediately when a listed stop condition occurs.
Identify the manufacturer, exact model, and tank type
Use RV records or an already-visible data plate. Record the full manufacturer, model, serial number, tank or tankless design, and whether the label points to a current or legacy family.
Source
Source: Suburban printed pages 3-4 and official model locator; Dometic printed pages 5-6, Model Identification
Record the installed normal controls and selected mode
Without opening a panel, note whether the RV provides GAS, ELECTRIC, a combined control, a tankless display, or a standing-pilot control. Record which mode was selected and any visible indicator or error exactly as shown.
Source
Source: Suburban printed pages 4-7; Dometic printed pages 15-16
Observe only a cool, owner-visible exterior opening
From a safe position, record soot, visible damage, leakage, or obvious material covering a documented combustion-air or ventilation opening. Do not touch a hot surface, insert a tool, remove a cover, or reach into the appliance.
Source
Source: Suburban printed page 8; Dometic printed pages 15-17
Check your manual first
Only continue when your exact installed equipment and its documentation make this owner-accessible action clear.
Use the dedicated Suburban reset guide only for its confirmed scope
If the data plate and operation guide confirm a Suburban tank heater governed by Part 206244 Rev A and its red RESET indicator shows gas lockout, continue to the reviewed Suburban guide for the one documented interior-switch reset. Stop if the scope or control state differs.
Source and when to stop
Source: Printed page 5, gas operation and lockout
Stop if: The model is tankless or governed by another manual; The reset was already attempted; Lockout returns; Normal ignition still fails.
When this needs a technician
The same “no hot water” complaint can originate in different appliances and control systems. These routes remain at the normal-control and visible-observation level.
The manufacturer, model, or tank type is unknown
Stop and route to serviceKeep the appliance off until it is identified. A tankless error, standing-pilot complaint, and electronic tank-heater lockout cannot safely share a reset or parts list.
Source: Part Number 206244, Revision A, 03-22-2023, Form 3317866.000, Revision A, 08/22, Suburban support page, reviewed 2026-08-07
A confirmed Suburban tank heater shows the red RESET indicator
Manual-specific owner actionFor a model governed by Operation Guide 206244 Rev A, the indicator can show gas-ignition lockout. Use the reviewed Suburban reset guide for its one bounded interior-switch action; do not press an exterior ECO control or infer a failed part.
Source: Part Number 206244, Revision A, 03-22-2023
A current Dometic WH-series control shows gas lockout
Stop and route to serviceThe applicable Dometic manual must match WH-6GA, WH-6GEA, WH-9GEA, WH-10GEA, or WH-16GEA before interpreting its control light. The manual distinguishes gas and electric operation and sends persistent lockout to a Dometic Service Center.
Source: Form 3317866.000, Revision A, 08/22
Gas mode fails but electric mode still heats
Stop and route to serviceRecord that the failure is mode-specific. On covered combination models, one mode can continue while the other is locked out. Do not use that observation to diagnose a valve, electrode, board, wiring, thermostat, ECO, or propane component.
Source: Part Number 206244, Revision A, 03-22-2023, Form 3317866.000, Revision A, 08/22
Electric mode fails but gas mode still heats
Stop and route to serviceRecord the exact switch state and which mode still works. DE, DEL, and Dometic WH-series control arrangements differ. Do not access a 120-volt element, junction box, wiring, thermostat, ECO, or circuit panel through this guide.
Source: Part Number 206244, Revision A, 03-22-2023, Form 3317866.000, Revision A, 08/22
Neither mode heats or the tank may be empty
Stop and route to serviceDo not energize a tank heater until the tank is confirmed full using the RV manufacturer's normal fill procedure. If the tank is full and neither supported mode operates, record the controls and route to the exact manual or qualified service.
Source: Part Number 206244, Revision A, 03-22-2023, Form 3317866.000, Revision A, 08/22
Soot, a leak, hot-water discharge, odor, alarm, or smoke appears
Stop and route to serviceThis is a stop condition rather than a troubleshooting branch. Follow the emergency gate for odor, alarm, smoke, fire, soot, or suspected exhaust entry. Keep a leaking, damaged, or unexpectedly discharging appliance off and arrange qualified service.
Source: Part Number 206244, Revision A, 03-22-2023, Form 3317866.000, Revision A, 08/22
Time to call a tech
Stopping here protects the RV and gives the technician a clearer starting point.
Propane odor, an alarm, smoke, fire, soot, or suspected exhaust entry occurs.
Follow the emergency gate. Leave first and contact emergency services, the gas supplier, or qualified service from a safe location. Do not resume operation until the RV and appliance are cleared.
A lockout persists, normal ignition fails, or a control state does not match the exact manual.
Keep the appliance off and contact the applicable manufacturer service center or qualified RV technician. Report the exact model, selected mode, indicator state, and any prior bounded reset.
The tank-fill state is unknown, neither supported mode heats, or a breaker or fuse trips.
Do not energize the appliance or investigate internal electrical or pressure components. Confirm the installation through the RV manufacturer or arrange qualified service.
A leak, unexpected hot-water release, damaged tank or housing, or pressure-system concern is present.
Keep the water heater off, keep people away from the affected area, and arrange qualified RV service. This troubleshooting guide does not authorize draining or pressure-component work.
Before you call for service
Make a clear service brief
Record these details without repeating failed starts, opening a service cover, touching a hot surface, or draining a tank.
- Manufacturer, full model, serial number, and applicable manual revision
- Tank or tankless design and ignition/control type
- Installed GAS, ELECTRIC, combined, or display controls
- Selected mode and exact indicator or error state
- Whether one mode works while the other does not
- Whether a tank was confirmed full through the RV manufacturer's normal procedure
- Any prior manufacturer-authorized reset and its result
- Any soot, obstruction, leak, hot-water discharge, odor, alarm, smoke, abnormal sound, or breaker/fuse trip
Quick reference
Common questions
What should I check first when an RV water heater stops working?
First identify the manufacturer, exact model, tank or tankless design, installed ignition/control type, and selected gas or electric mode. Then record the normal control and indicator state. Do not begin with an internal part or universal reset.
Can gas mode fail while electric mode still works?
Yes, a combination water heater can show mode-specific failure. Record exactly which mode works and which indicator appears, but use the exact model manual or qualified service rather than diagnosing a gas or electrical component from that observation.
Does every RV water heater have a pilot light or reset button?
No. Water heaters can use standing-pilot, direct-spark, tankless, or electronic controls, and the reset method depends on the exact model and manual. Many modern direct-spark units do not have a standing pilot.
Primary documentation
Sources and revision record
Suburban Tank Water Heaters Operation & Maintenance Guide
Part Number 206244, Revision A, 03-22-2023
Reviewed: August 7, 2026
Relevant sections: Printed pages 3-9: safety, control distinctions, gas lockout, visible soot and door-screen observations, full-tank requirement, and service routing
L.P. Gas Water Heater Installation and Operation Manual
Form 3317866.000, Revision A, 08/22
Reviewed: August 7, 2026
Relevant sections: Printed pages 2-6 and 15-17: safety, service boundary, model identification, electronic controls, lockout, full-tank warning, and service-center routing
Where's My Model Number?
Suburban support page, reviewed 2026-08-07
Reviewed: August 7, 2026
Relevant sections: Suburban Water Heater (SW | V | SAW Models) and IW60 Tankless Water Heater
Revision note: Third-pass minimal revision: restores a direct model-first opening while retaining the removal of universal gas, electrical, pressure-system, and parts procedures.
Sources last reviewed: August 7, 2026