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RV Repair Journal

Photos and straightforward explanations from RV diagnostics, repairs, inspections and maintenance visits throughout Northeast Tennessee.

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Leveling repair photo 1 on Tiffin Allegro Bus Class A motorhome in Johnson City, Tennessee

Johnson City, TN · 2026-10-13 · Repair completed

Tiffin Allegro Bus HWH Automatic Leveling System Service in Johnson City, TN

Inspection and operational testing identified two contributing issues. The HWH hydraulic reservoir was approximately one quart low on fluid, which limited the travel of the left-front leveling jack and prevented it from reaching the ground. The automatic leveling system also required recalibration so the controller could correctly recognize level and operate all four hydraulic jacks together.

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Slide-out repair photo 1 on Winnebago Micro Minnie travel trailer in Jonesborough, Tennessee

Jonesborough, TN · 2026-10-03 · Repair completed

Winnebago Micro Minnie Schwintek Slide-Out Resynchronization

A thin storage box had slipped behind the slide-out’s interior fascia and become wedged between the slide room and the RV wall. The obstruction stalled one side of the Lippert Schwintek In-Wall slide-out. Repeated attempts to operate the room left the two slide motors out of synchronization. The RV uses a Lippert dual-motor synchronous velocity slide controller labeled part 13398-DO.

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Plumbing repair photo 1 on 2022 Forest River Rockwood Geo Pro G19FD travel trailer in Elizabethton, Tennessee

Elizabethton, TN · 2026-10-03 · Repair completed

SHURflo 4008 RV Water Pump Diagnosis & Replacement in Elizabethton, TN

Diagnosed the Pentair SHURflo Revolution 4008-101-A65, one of the most common 12V fresh-water pumps used in travel trailers and other RVs. The external pressure-switch connections were secure, but moving the wires changed pump operation, indicating an internal fault in the sealed pressure switch. Inspection also found the pressure-switch diaphragm leaking. The original pump was rated at 3.0 GPM and 55 PSI.

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Water heater repair photo 1 on 2018 travel trailer in Jonesborough, Tennessee

Jonesborough, TN · 2026-09-21 · Repair completed

Water Heater Bypass Plumbing Leak Repair

The leak was at an uncommon three-way PEX-to-1/2-inch swivel fitting in the water-heater bypass assembly. A matching replacement fitting was not available locally. Inspection also found that the water heater’s anode rod was depleted.

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Electrical repair photo 1 on Class A Sightseer motorhome in Jonesborough, Tennessee

Jonesborough, TN · 2026-09-18 · Repair completed

Kwikee Step Repair and Slide-Out Diagnosis in Jonesborough

An electronic step tester showed power to the steps and a responding controller, but no motor movement through the harness. The motor ran when powered directly, pointing to a poor motor-to-controller connection. For the slide-out, the owner had installed two automotive starting batteries; inadequate power under load was suspected but not confirmed.

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Air conditioner repair photo 1 on 2021 Vengeance Rogue toy hauler — Coleman Mach 15, part #48254-666 in Bristol, Tennessee

Bristol, TN · 2026-09-17 · Repair completed

Coleman Mach 15 AC Repair at All American Campground

Removing the lower air box revealed an evaporator coil frozen solid and a freeze sensor that had not been inserted into the coil. The ducts were unobstructed. The plenum divider had been installed diagonally instead of separating the return and supply air, allowing the two air streams to mix. Several missing air-box screws also left a loose ceiling seal that allowed air to escape. After the ice melted, the evaporator coil was found to be dirty.

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Electrical repair photo 1 on Class A motorhome in Bristol, Tennessee

Bristol, TN · 2026-09-17 · Repair completed

RV Battery-Cable Repair at Rogers Gardens Campground

Inspection identified a heavy-duty 4/0 battery jumper cable requiring a replacement lug with a 1/2-inch stud hole. This was not an ordinary replacement battery terminal: the repair needed the correctly sized lug and equipment capable of hydraulically crimping it onto the cable.

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Water heater repair photo 1 on Jayco North Point fifth wheel in Bristol, Tennessee

Bristol, TN · 2026-09-16 · Repair completed

Truma AquaGo Water Heater Repair at Earhart Campground

Testing found water flow hovering around the heater’s minimum operating threshold. The customer had been checking operation through the Nautilus exterior shower and had switched from the built-in three-stage filtration system to an external inline hose filter, installing winterization caps in the built-in filter housings. We checked the plumbing configuration and exterior shower controls. Restoring the normal filter setup and fully shutting off the exterior shower restored water flow and stopped the short cycling. The symptoms pointed to a water-flow issue rather than a heater that would not ignite.

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Air conditioner repair photo 1 on Brinkley fifth wheel in Bristol, Tennessee

Bristol, TN · 2026-09-11 · Repair completed

GE RV Air Conditioner Replacement at Bristol Motor Speedway

The original diagnostic visit found freezing at the evaporator inlet, unusually low compressor amperage and no airflow restriction, indicating a sealed-system failure consistent with low refrigerant charge. Because the original R-410A air conditioner was obsolete, the replacement required both a new rooftop unit and a compatible control box.

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Air conditioner repair photo 1 on Brinkley fifth wheel in Johnson City, Tennessee

Johnson City, TN · 2026-09-02 · Follow-up needed

GE RV Air Conditioner Diagnosis in Johnson City, TN

After allowing the air conditioner to operate for approximately 20 minutes, Keith measured the compressor’s electrical draw at 5.38 amps, substantially below the manufacturer’s 8.5 RLA specification. Inspection found no debris, obstructions or restricted airflow. However, the capillary tubes were freezing immediately before entering the evaporator coil. The unusually low compressor amperage, freezing at the evaporator inlet and absence of an airflow restriction indicated a sealed-system problem consistent with a low refrigerant charge.

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Leveling repair photo 1 on Towable RV in Jonesborough, Tennessee

Jonesborough, TN · 2026-08-25 · Follow-up needed

RV Stabilizer-Jack Motor and Switch Diagnosis in Jonesborough, TN

The stabilizer-jack fuse was good, and more than 12 volts were reaching the switch. However, no power was leaving the switch. After separating the motor from the stabilizer jack and supplying 12 volts directly to it, Keith confirmed that the motor was running internally but its output shaft was not turning. The motor had failed internally, and the resulting electrical demand may also have damaged the switch.

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Air conditioner repair photo 1 on RV with Coleman-Mach 8 rooftop air conditioner in Butler, Tennessee

Butler, TN · 2026-08-21 · Follow-up needed

Coleman-Mach 8 RV Air Conditioner Diagnosis in Butler, TN

Sunset Mobile RV Repair tested the compressor capacitor, incoming 120-volt power, thermal overload and compressor windings. The capacitor tested within specification, the compressor was receiving the correct voltage and the thermal overload was operating correctly. Continuity testing between the compressor terminals and metal shell confirmed that the compressor had shorted to ground.

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Refrigerator repair photo 1 on Travel trailer in Roan Mountain, Tennessee

Roan Mountain, TN · 2026-08-13 · Diagnosis only

Dometic RV Refrigerator and Electrical Diagnosis at Roan Mountain State Park

Testing showed that the refrigerator thermistor’s resistance readings were outside the manufacturer’s specifications, identifying a faulty thermistor as the cause of the inconsistent refrigerator temperature. Additional testing of the trailer’s seven-way connection traced the Trailer Disconnect warning to a poor electrical connection on the truck side of the connector.

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Electrical repair photo 1 on Pop-up camper in Elizabethton, Tennessee

Elizabethton, TN · 2026-05-20 · Diagnosis only

RV Electrical Miswiring and Converter Diagnosis

Electrical testing showed that the camper had been connected to 240 volts instead of the required 120-volt, 30-amp RV supply. The incorrect voltage damaged the converter. Testing of the remaining 120-volt and 12-volt systems did not reveal additional damage.

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