RV Repair FAQs | On The Road RV Tech
Straight answers to common questions about RV electrical systems, appliances, plumbing, roofs, exterior components, running gear, and mobile RV diagnostics.
RV Repair & Service Frequently Asked Questions
RV problems are not always easy to categorize. A symptom inside the coach may actually begin in the battery compartment, on the roof, underneath the RV, or in a control system connected to several components.
The questions below are organized by the part of the RV you are experiencing trouble with. If you do not know which section fits your problem, that is okay. Tell us what the RV is doing and we can review the symptoms from there.
Inside the RV
Questions about air conditioning, furnaces, refrigerators, appliances, water heaters, controls, slide rooms, Aqua-Hot systems, and other equipment used inside the coach.
Why is my RV air conditioner running but not cooling?
An RV air conditioner can run without cooling properly for several reasons. The issue may involve airflow, ducting, a fan, capacitor, compressor circuit, thermostat, zone control, electrical supply, or the rooftop unit itself.
Testing the temperature difference between return and supply air, checking airflow, and confirming the electrical operating conditions can help separate an airflow problem from an equipment problem.
Why does my RV air conditioner freeze or ice up?
Icing can be related to restricted airflow, dirty components, duct problems, fan operation, operating conditions, or a problem within the air-conditioning system.
The cause should be identified before assuming the rooftop unit needs to be replaced.
Why does one air-conditioning zone work while another does not?
Multi-zone systems depend on thermostats, sensors, zone controls, communication wiring, control boards, and the individual heating or cooling equipment.
A problem with one zone does not necessarily mean the entire HVAC system has failed.
Why is my RV furnace running but not producing heat?
A furnace may operate the blower without successfully completing the heating sequence. Possible areas requiring diagnosis include the electrical supply, thermostat request, blower operation, airflow, controls, wiring, and ignition system.
Propane-related work is performed only where permitted by applicable licensing and safety requirements.
Why does my RV furnace start and then shut down?
Repeated cycling or premature shutdown can involve airflow, controls, thermostat operation, wiring, or other parts of the furnace operating sequence.
The timing of the shutdown and what happens immediately beforehand can provide useful diagnostic information.
Why is my RV refrigerator not staying cold?
The answer depends partly on the type of refrigerator installed. RV refrigerators may rely on 12-volt power, 120-volt power, controls, fans, thermistors, ventilation, defrost components, or other operating conditions.
A warm refrigerator should be evaluated as a complete system rather than assuming the cooling unit itself has failed.
Why is my RV refrigerator freezing food?
Uneven or excessively cold temperatures can involve temperature sensing, thermistor position or operation, airflow, controls, or other refrigerator-specific conditions.
Providing the refrigerator manufacturer, model number, and a description of which areas are freezing can help narrow the diagnostic path.
Do you work on tankless RV water heaters?
Yes. Tankless RV water-heater diagnostics are included in the service scope.
Useful information includes whether the heater starts, whether water temperature fluctuates, whether an error code appears, and whether the problem occurs at every fixture.
Do you work on traditional tank-style RV water heaters?
Yes. Service can include tank-style water-heater diagnostics involving electric operation, ignition controls, switches, control boards, wiring, and the supporting systems required for the heater to operate.
Do you repair RV stoves, cooktops, and ovens?
Operating problems with RV stoves, cooktops, and ovens are included within the appliance service scope.
The exact appliance manufacturer, model, symptoms, and available power or fuel source should be provided with the service request when possible.
What is Aqua-Hot and do you service it?
Aqua-Hot is a hydronic heating and hot-water system used in many RVs and motor coaches.
Can you troubleshoot RV touchscreens and smart control panels?
Yes. The documented service capabilities include Firefly Integrations, Lippert OneControl, touchscreen and digital controls, CAN-network communication faults, control modules, remote panels, sensors, and multiplex control concerns.
Why does my RV control panel show several unrelated errors at the same time?
Multiple faults do not always mean that several components failed simultaneously.
Voltage problems, network communication faults, wiring issues, sensors, controls, or shared system conditions can cause several warnings to appear together.
Do you replace RV appliances?
Replacement and installation of selected RV appliances are included in the documented service capabilities.
Installation is subject to technician review, equipment compatibility, safe access, system condition, and the practical limits of mobile field service.
Outside the RV
Questions about roofs, seals, water intrusion, slide-outs, awnings, entry steps, doors, exterior trim, and other exterior components.
How do I know if my RV roof is leaking?
Common signs can include visible moisture, stains, soft materials, water around a wall or ceiling, or a leak that appears after rain.
The visible wet area may not be directly below the actual entry point because water can travel before becoming noticeable inside the RV.
Can you determine where an RV roof leak is coming from?
Leak-source investigation and water-intrusion diagnosis are included in the service scope.
Inspection may involve roof materials, seams, penetrations, vents, accessory mounts, slide areas, windows, doors, trim, and other exterior sealing points.
Do you inspect RV roof sealant?
Yes. Roof-sealant inspection, roof penetrations, vents, seams, and other exterior sealing areas are included in the documented roof-service scope.
Can you reseal an RV roof?
Minor roof-sealant repairs and preventive resealing recommendations are included.
Complete roof replacement and extensive structural reconstruction require individual evaluation and may need to be referred when they exceed the practical scope of mobile service.
Do you inspect RV roof vents and accessory penetrations?
Yes. Roof vents, accessories, and roof penetrations are included in the inspection and sealing service scope.
These areas are important because they depend on maintained seals to prevent water entry.
Can a slide-out cause an RV water leak?
Yes. Slide seals, alignment, mounting areas, and the way a slide room closes can affect water intrusion.
The documented service scope includes slide-seal inspection and water-intrusion concerns around slide rooms.
Why will my RV slide-out not extend or retract?
Slide rooms depend on power, motors, controllers, wiring, sensors, synchronization, alignment, and mechanical hardware. A slide that does not move should be diagnosed before assuming the motor or controller needs replacement.
Why does one side of my RV slide move while the other side stops?
Uneven movement can involve synchronization, motors, controllers, sensors, wiring, mechanical binding, or alignment.
The documented service scope includes diagnosis of these conditions.
Do you work on Schwintek slide systems?
Yes. Schwintek in-wall slide systems are included in the service scope.
Do you work on SlimRack slide systems?
Yes. SlimRack systems are also included, along with through-frame, above-floor, and cable-operated slide systems.
Do you service RV awnings?
Awning operating problems and selected minor awning repairs are included within the documented exterior-service capabilities. The exact work accepted depends on the condition of the awning, safe access, and the repair required.
Do you repair electric RV entry steps?
Yes. Service can include electric entry-step diagnosis and problems involving motors, linkages, controllers, switches, and mechanical damage.
Kwikee electric steps are specifically included in the documented capabilities.
Do you work on RV doors and latches?
Yes. Door and latch adjustments, compartment-door concerns, and related exterior-component issues are included.
Do you work on RV exterior trim and molding?
Selected loose or damaged trim, exterior molding, and seal repairs are included within the documented service scope.
Do you perform complete RV roof replacements?
Complete roof replacement is not presented as a standard mobile service.
Major roof replacement, collision repair, fiberglass reconstruction, extensive structural work, welding, or fabrication should be evaluated individually and may require referral.
RV Electrical, Battery, Solar & Power Systems
Questions about 12-volt and 120-volt power, batteries, converters, inverters, solar, charging, shore power, transfer switches, generators, and electrical controls.
Why does my RV have no power?
“No power” can mean several different things depending on which equipment has stopped working.
An RV combines 12-volt DC and 120-volt AC systems along with batteries, converters, inverters, shore power, transfer equipment, breakers, fuses, relays, disconnects, and wiring.
The first step is identifying which part of the electrical system has lost power and under which power source the problem occurs.
Why do my RV batteries keep going dead?
A dead battery does not automatically mean the battery is bad.
The problem can involve battery condition, charging voltage, converter or inverter/charger operation, solar charging, parasitic loads, wiring, configuration, disconnects, or the way the battery bank is balanced.
Can you test RV batteries before replacing them?
Yes. Battery condition and load testing are included within the electrical service scope.
Battery testing is more useful when it is combined with an evaluation of the charging system and the loads connected to the battery bank.
What is a parasitic battery draw?
A parasitic draw is electrical consumption that continues when the owner may expect the RV to be using very little power. Parasitic-draw testing is included in the documented electrical diagnostic capabilities.
Do you work on lithium RV batteries?
Yes. Lithium battery troubleshooting, upgrades, battery-bank configuration, and related charging-system work are included within the documented capabilities.
Do you service Victron RV electrical systems?
Yes. On The Road RV Tech has confirmed Victron installer credentials.
Service can include Victron system diagnostics, configuration, inverter/charger systems, monitoring, charging, and related RV electrical equipment.
Do you service Renogy systems?
Yes. Renogy installation and system diagnostics are part of the documented qualifications and service scope.
Why is my RV solar system not charging the batteries?
The problem may involve the panels, wiring, roof entry, connectors, charge controller, MPPT controller, settings, battery bank, or another part of the charging system.
Testing should follow the charging path from the solar source to the battery rather than assuming the panels themselves have failed.
Do you test RV solar charge controllers?
Yes. Solar-controller diagnostics and MPPT charge-controller testing are included.
What is the difference between an RV converter and inverter?
A converter is commonly involved in converting available AC power to DC power for the RV’s 12-volt system and battery charging.
An inverter performs the opposite general function by using battery DC power to provide AC power to compatible RV loads. Some RVs use combined inverter/charger equipment.
Can you diagnose an RV inverter that keeps shutting down?
Yes. Inverter and inverter/charger diagnosis are included in the service scope.
Useful information includes when the shutdown occurs, the battery condition, the loads operating at the time, and any warning or fault code.
Why do my RV outlets work on shore power but not on the inverter?
The cause may involve inverter operation, transfer equipment, wiring, distribution, battery supply, settings, or which circuits were designed to receive inverter power.
Testing is needed to determine where the expected AC power path stops.
Do you diagnose shore-power problems?
Yes. Shore-power and power-distribution problems are included in the electrical service scope.
Do you test RV transfer switches?
Yes. Automatic transfer-switch testing is specifically included.
Can a bad electrical connection cause several RV problems at once?
Yes. Poor connections, excessive resistance, grounding problems, low voltage, or shared control circuits can affect more than one system.
That is one reason the documented diagnostic approach includes voltage-drop testing, grounding and bonding checks, wiring inspection, and multi-system troubleshooting.
Do you work on RV generators?
Yes. Generator diagnostics can include starting problems, shutdowns, fuel delivery, battery and voltage supply, fault codes, wiring, control circuits, load testing, and basic preventive service. Cummins Onan generator troubleshooting is included in the documented service scope.
What should I do if I see electrical arcing, smoke, melted wiring, or an overheating battery?
Stop using the affected equipment and move away from the immediate hazard.
If there is fire, smoke, an active electrical hazard, battery thermal event, or another immediate danger, contact emergency services. Do not open energized electrical equipment or attempt hazardous testing based on website information.
RV Water, Plumbing & Holding Tanks
Questions about leaks, water pumps, pressure, fresh-water systems, PEX, wet bays, toilets, tanks, drainage, odors, valves, and water-system problems.
Why does my RV water pump keep running when no faucet is open?
A pump that continues running or cycles when all fixtures are closed can be responding to a leak, pressure loss, valve issue, pump problem, or another condition in the fresh-water system.
The documented plumbing service scope includes pump cycling with no fixture open.
Why is my RV water pressure low?
Low water pressure can involve the water source, regulator, pump, valves, restrictions, plumbing connections, or other fresh-water components. The system should be evaluated under the condition where the low pressure occurs.
Can you find a hidden RV water leak?
Yes. Active, hidden, and intermittent water-leak diagnosis are included.
Because water can travel before it becomes visible, the first wet area found is not always the source.
Do you repair RV PEX plumbing?
Yes. PEX, fittings, valves, and hose repairs are included within the documented plumbing capabilities.
Do you work on RV wet-bay plumbing?
Yes. Wet-bay plumbing repairs are specifically included.
Do you replace RV faucets and plumbing fixtures?
Faucet and fixture replacement is included within the documented service scope.
Do you work on city-water connection problems?
Yes. City-water connection problems and fresh-water fill problems are included.
Can you install an RV water-pressure regulator?
Pressure-regulator installation is included within the documented plumbing capabilities.
Do you inspect RV plumbing for freeze damage?
Yes. Freeze-damage inspection is included.
Do you diagnose winterization-valve and water-heater bypass problems?
Yes. Water-heater bypass and winterization-valve problems are included within the service scope.
Do you clean RV black tanks?
Yes. Professional black-tank cleaning is included in the documented service scope.
Do you clean RV gray tanks?
Yes. Gray-tank cleaning is also included.
Do you offer hydrojet tank cleaning?
Yes. Hydrojet tank cleaning is specifically included in the documented service capabilities.
Why does my RV holding tank still smell after I dump it?
Persistent odor can be related to buildup, biofilm, drainage conditions, venting, an air-admittance valve, dump components, or another part of the waste system.
Cleaning may be part of the solution, but odor diagnosis should consider the supporting system as well.
Why is my RV black or gray tank draining slowly?
Slow drainage can involve buildup, restrictions, dump valves, termination components, or another issue in the tank or drain system.
The documented service scope includes slow-draining tanks and related investigation.
Why does my holding-tank monitor still show full after the tank is empty?
Incorrect or unreliable tank-level readings are included in the holding-tank service scope.
Buildup inside the tank may affect sensing, although the actual cause should be verified before assuming cleaning alone will correct it.
Do you inspect RV dump valves?
Yes. Dump-valve and termination inspection are included.
Can you diagnose an RV toilet problem?
Yes. Toilets are included within the confirmed RV plumbing, water, and waste-system repair scope.
What should I do if an RV water leak is actively flooding the coach?
Shut off the water source when it is safe to do so.
If water is contacting electrical equipment or creating another immediate safety hazard, avoid the affected area and seek appropriate emergency assistance. The service-request process is for intake and should not be used as a substitute for emergency response.
RV Frame, Wheels, Axles, Brakes & Running Gear
Questions about trailer bearings, electric brakes, axles, suspension, running gear, towing-safety systems, leveling equipment, and chassis-related inspections.
Do you inspect RV trailer bearings?
Yes. Trailer bearing inspection is included within the documented running-gear service capabilities
Do you repack RV trailer bearings?
Yes. Trailer bearing inspection and repacking are both included.
Do you inspect electric trailer brakes?
Yes. Electric brake inspection and adjustment are included within the service scope.
Can you adjust RV electric brakes?
Yes. Electric brake adjustment is specifically included.
Do you inspect RV axles?
Yes. Visual inspection of axles, brakes, and frame components is included.
Do you inspect RV suspension systems?
Yes. Suspension and running-gear inspection are included within the documented capabilities
Can you inspect the RV frame for problems?
The documented service scope includes visual inspection of the frame along with axles and brakes.
Major structural reconstruction, collision repair, welding, or fabrication should be evaluated separately and may require another provider.
Do you work on RV ABS systems?
ABS system assessment is included in the documented chassis and towing-safety capabilities.
Do you inspect RV tires?
Tire-condition and inflation-system review are included as part of the documented towing-safety assessment.
Tire mounting, wheel alignment, and tire-shop services are not presented as standard On The Road RV Tech services.
Do you perform pre-travel running-gear inspections?
Yes. Pre-travel running-gear checks are included.
These can be especially useful before a longer trip or when the trailer’s maintenance history is uncertain.
Do you repair RV leveling jacks?
Yes. The service scope includes hydraulic and electric leveling systems, jacks that will not extend or retract, pumps, motors, solenoids, valves, relays, controllers, and calibration.
Why will my leveling jacks not extend or retract?
The cause may be electrical, hydraulic, mechanical, or control-related.
Low voltage, high-current problems, pumps, motors, solenoids, valves, relays, controllers, and calibration can all affect leveling-system operation.
Do you work on Power Gear leveling systems?
Yes. Power Gear systems are included.
Do you work on Ground Control and Level Up systems?
Yes. Ground Control and Level Up are specifically included in the documented leveling-system service scope.
Do you work on Titan leveling systems?
Yes. Titan leveling systems are also included in the documented capabilities.
Do you repair RV engines or transmissions?
Engine and transmission repair are not presented as standard mobile RV-house-system services.
Major engine, transmission, diesel-engine, alignment, tire-shop, heavy chassis, collision, welding, and structural work may require evaluation or referral.
Can you inspect the RV before a long trip?
Yes. Pre-trip reliability inspections and running-gear checks are part of the documented preventive-service capabilities.
Depending on the requested scope, the inspection can also include batteries, charging, roof and seals, water systems, HVAC, appliances, slides, leveling equipment, holding tanks, and selected safety systems.
We are Mr. Done Right - Handyman
Still Not Sure Which RV System Is Causing the Problem?
That is common. RV systems share power, controls, wiring, plumbing, sensors, mechanical components, and other supporting systems. The part showing the symptom is not always the part that caused it.
When submitting a service request, tell us:
What the RV is doing
When the problem started
Whether it happens constantly or intermittently
The RV year, manufacturer, and model
The affected equipment manufacturer and model when known
Any error codes or warning messages
What has already been repaired or replaced
Your current RV location
Photos or video of the affected area when available
On The Road RV Tech can review the request and determine the appropriate next step.
Still Not Sure Which RV System Is Causing the Problem?
Still Not Sure Which RV System Is Causing the Problem?
That is common. RV systems share power, controls, wiring, plumbing, sensors, mechanical components, and other supporting systems. The part showing the symptom is not always the part that caused it.
When submitting a service request, tell us:
What the RV is doing
When the problem started
Whether it happens constantly or intermittently
The RV year, manufacturer, and model
The affected equipment manufacturer and model when known
Any error codes or warning messages
What has already been repaired or replaced
Your current RV location
Photos or video of the affected area when available
On The Road RV Tech can review the request and determine the appropriate next step.
SERVICE SCOPE NOTE
Services are subject to technician review, system condition, safe access, parts availability, manufacturer support, applicable licensing requirements, and the practical limits of mobile field service.
Some engine, transmission, tire, alignment, collision, structural, welding, fabrication, sealed-refrigerant, or dealership-only repairs may require evaluation or referral to another service provider.
About
We are On-the-Road RV Tech — master-certified mobile RV specialists who diagnose complex RV system problems and deliver reliable solutions tailored to your rig, wherever the road takes you.
Best Mobile RV Technician
On-the-Road RV Tech is Master-Certified in Mobile RV Diagnostics
Best Mobile RV Technician
On-the-Road RV Tech is Master-Certified in Mobile RV Diagnostics
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