Manual-backed troubleshooting
RV Water Heater Not Working? Start With What Responds
Identify the exact water heater, then note whether the normal control shows no light, a lockout indicator, a tankless error, gas-only failure, electric-only failure, or no heat in either mode. That gives you the right manual or service route without opening the appliance.
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 exact appliance before operating it
Use RV records or an already-visible label to record the manufacturer, full model, serial number, tank or tankless design, control type, and installed energy modes.
Source
Source: Suburban printed pages 3-4 and model locator; Dometic printed pages 5-6
Record one normal-control response
After confirming exact scope and a full tank where applicable, use the installed normal control once. Record the selected mode, indicator or error, sound, and whether any heat follows. Do not repeat failed starts.
Source
Source: Suburban printed pages 4-7; Dometic printed pages 15-16
Observe only a cool, visible exterior area
From a safe position, record soot, leakage, visible damage, or material covering a documented exterior airflow opening. Do not touch a hot surface, insert a tool, remove a cover, or reach inside.
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.
Continue to the Suburban reset only for a confirmed matching lockout
If the exact appliance is a Suburban tank heater governed by Guide 206244 Rev A and its red RESET indicator shows gas lockout, use the dedicated reviewed page for its single documented interior-switch reset. Do not use that reset for silence, another brand, or another control state.
Source and when to stop
Source: Printed page 5, gas operation and lockout
Stop if: The control is silent rather than locked out; The reset was already attempted; Lockout returns; Normal ignition still fails.
When this needs a technician
Observe one normal request for heat only after exact identification and confirmation that a tank model is full. Do not repeat failed starts or convert the symptom into a component diagnosis.
No light, display, sound, or other response appears
Stop and route to serviceRecord the complete lack of response and compare the installed control with the exact RV and water-heater owner manuals. This observation does not authorize generic fuse replacement, voltage testing, wiring access, switch bypass, or control-board replacement.
Source: Part Number 206244, Revision A, 03-22-2023, Form 3317866.000, Revision A, 08/22
A red or lockout indicator appears
Manual-specific owner actionA lockout is a different state from total silence. If the exact model is a covered Suburban tank heater, use the dedicated reviewed reset guide. For a current Dometic WH-series unit, persistent lockout routes to a Dometic Service Center.
Source: Part Number 206244, Revision A, 03-22-2023, Form 3317866.000, Revision A, 08/22
Gas mode is silent but electric mode heats
Stop and route to serviceRecord a gas-mode-specific failure and stop there. Do not infer a propane supply, ignition, valve, electrode, board, thermostat, ECO, or wiring fault from the mode split.
Source: Part Number 206244, Revision A, 03-22-2023, Form 3317866.000, Revision A, 08/22
Electric mode is silent but gas mode heats
Stop and route to serviceRecord an electric-mode-specific failure and the exact installed switch arrangement. Do not access a 120-volt element, junction box, breaker internals, wiring, thermostat, or ECO through this page.
Source: Part Number 206244, Revision A, 03-22-2023, Form 3317866.000, Revision A, 08/22
Neither mode responds or tank-fill state is unknown
Stop and route to serviceKeep the heater off. A tank model must be confirmed full through the RV manufacturer's normal procedure before operation. If it is full and neither documented mode responds, route the observation to the exact manual or qualified service.
Source: Part Number 206244, Revision A, 03-22-2023, Form 3317866.000, Revision A, 08/22
Soot, leakage, hot-water release, odor, alarm, or smoke appears
Stop and route to serviceStop. Follow the emergency gate for odor, alarm, smoke, fire, soot, or suspected exhaust entry. Keep a leaking, damaged, or unexpectedly releasing 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.
The appliance remains completely silent after one normal-control request.
Keep it off and compare the installed control with the exact RV and water-heater owner manuals or arrange qualified service. Internal electrical diagnosis is outside this page.
A lockout repeats, neither mode responds, or a breaker or fuse trips.
Stop using the controls and arrange manufacturer-authorized or qualified RV service. Report the exact model, selected mode, indicator state, and prior bounded reset.
The tank-fill state is unknown or leakage, damage, or a pressure-system concern is present.
Keep the appliance off, keep people away from the affected area, and arrange qualified RV service. This page does not authorize tank, drain, 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, tank type, and manual revision
- Installed control and available gas/electric modes
- Exact result of one normal-control request
- Whether the control was silent or showed a lockout/error
- Whether one mode works while the other is silent
- 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 release, odor, alarm, smoke, abnormal sound, or breaker/fuse trip
Quick reference
Common questions
Why does my RV water heater do nothing when I turn it on?
First distinguish complete silence from a lockout light or error. Confirm the exact model, tank-fill state, installed control, and selected gas or electric mode, then record one normal-control response. Do not infer a fuse, board, igniter, or propane fault from silence alone.
Is a lockout light the same as no power?
No. A lockout indicator shows that the control responded and entered a documented failure state; complete silence is a different observation. Use the exact model manual and do not apply a lockout reset to an unresponsive or unidentified unit.
Should I replace the fuse if the water heater is silent?
Not from this symptom alone. Fuse location, rating, and owner authorization belong to the exact RV and appliance manuals, and a repeated trip can indicate a condition that requires qualified electrical diagnosis.
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, gas/electric control distinctions, lockout, full-tank requirement, visible soot and screen observations, 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, normal 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 no-response opening while retaining the removal of fuse, ignition, gas, electrical, pressure, and component diagnosis.
Sources last reviewed: August 7, 2026