RV tankless water heaters provide unlimited hot water but are more sensitive to water quality and flow rate than tank heaters. Florida campground water often contains sand and mineral sediment that clogs the inlet strainer on tankless units - the most common cause of 'no hot water' on a tankless unit is actually a blocked inlet, not a heater failure.
The Rinnai and Girard tankless units used in RVs have very specific minimum flow requirements - typically 0.5 to 0.7 gallons per minute to trigger the flow sensor and start the burner. If water pressure or flow is too low (from a partially closed valve, clogged strainer, or weak pump), the heater won't activate even though everything else is working.
Tankless Water Heater Diagnosis
- Check inlet strainer - clean or replace if blocked with sediment
- Verify minimum flow rate is being met (0.5+ GPM at a flow-restricted faucet)
- Test ignition sequence - listen for spark, verify gas is flowing
- Check error codes on the controller display
- Test flow sensor - verify it's opening the gas valve at minimum flow
Common Tankless RV Repairs
Inlet strainer cleaning is a 20-minute fix that resolves 30 to 40 percent of tankless 'no hot water' calls. The strainer is at the cold water inlet and is easily accessed from the exterior compartment. For flow sensor failures, the sensor is replaceable on-site. Control board failures are the most expensive repair on tankless units and sometimes make replacement more cost-effective on older units.
Service area: Apopka, Longwood, Casselberry, Altamonte Springs, Sanford, Lake Mary, DeLand, Deltona, DeBary, Mount Dora, Tavares, Leesburg, and all surrounding communities in Orange, Seminole, Lake, and Volusia counties.
Pricing for RV Tankless Water Heater Repair
Starting price range: $95 - $485. Flat-rate quote provided before any work begins. Request a free quote online or call (407) 326-5500.
*Estimates only. Final price determined on-site after diagnosis. Parts and labor included in flat rate.
Related Services
Also see: All RV Water Heater Repair services | All RV Repair Services | Apopka Service Area