Furrion Tankless Water Heater Troubleshooting
The Short Answer: A Furrion RV tankless heater that will not make hot water usually has no 12-volt or gas supply, insufficient flow, a blocked intake or exhaust, or a lockout such as E1. Photograph the display before resetting. Confirm the coach is not winterized or bypassed. Repeated ignition and combustion faults need an RV technician.
Licensed local technicians
Furrion RV tankless heater gone cold?
Connect with a licensed 24/7 technician in your zip code right now.
Search Intent & The Real Problem
Furrion RV tankless units use a 12-volt control system and propane burner to heat water only when flow is detected. A display can be on while the propane bottles are empty, the coach water pump is off, the bypass remains in winterize, or the flow is below activation. E1 is a product-family code, but the exact meaning and sequence should come from the label or manual for your model.
The first split is whether the unit sees water flow. If the display never shows a call, check valves, pump, filter, and fixture flow. If it calls and locks out, look at the code and outside vents. If it lights but the water is lukewarm, a mixing valve, low flow, scale, or gas pressure issue may be limiting output.
What other guides get wrong
They tell every owner to replace the igniter when the coach is still winterized or the water pump is off. They also confuse Furrion E1 with every other tankless E1 code. Furrion needs water flow, LP, air, exhaust, and a good 12-volt supply in the same sequence.
Step-by-Step Troubleshooting
Step 1: Photograph the unit and code
| Observation | Meaning | Next |
|---|---|---|
| Blank display | 12-volt fuse, switch, ground, or board | Check coach power |
| Display on, no flow call | Water, bypass, valve, or sensor | Step 2 |
| Flow call, no ignition | LP, igniter, burner, or lockout | Check vents; stop if repeated |
| E1 or another code | Model-specific fault | Photograph before reset |
| Hot then cold | Flow, overheating, scale, or gas | Compare temperatures |
- What to look for: Model number, code, water source, LP level, coach battery, and whether the furnace or other LP appliances work.
- Required tools: Phone, flashlight, and the RV manual.
Step 2: Prove the RV plumbing is ready
- What to look for: Fresh-water tank or city-water connection on, pump running, hot and cold valves open, bypass out of winterize, drain plug or service valve installed, and a steady stream from a hot tap. Start with a high-flow faucet.
- Required tools: Faucet and bucket.
Do not fire a water heater with an empty or bypassed system. Air in the heat exchanger can overheat it. If the pump cycles with every tap closed, find the plumbing leak before blaming the heater.
Step 3: Check coach power and propane
- What to look for: Battery disconnect on, 12-volt fuse intact, LP bottles open and not empty, regulator not frozen, and other propane appliances behaving normally. One reset of a tripped fuse is enough; if it opens again, leave it off.
- Required tools: Flashlight and the coach panel label. Do not open the LP system.
An RV can have enough power for a screen but not enough voltage under burner load. Battery and regulator testing belong to a trained RV technician.
Step 4: Check outside air and exhaust
- What to look for: Exterior intake and exhaust screens clear of mud daubers, snow, leaves, and storage covers. The burner needs combustion air and the exhaust must discharge freely. Soot, raw LP smell, or a delayed ignition is an immediate stop.
- Required tools: Eyes from outside the coach.
Never cover the opening to make the unit “run quieter.” Do not fire it if the blower or combustion fan is silent.
Step 5: Separate low flow from low heat
- What to look for: Flow at a tub or large sink, inlet temperature, outlet temperature, code timing, and whether the water goes cold after a minute. A dirty inlet screen or restrictive shower mixer can prevent activation. A hot outlet but cold shower points to the fixture or mixer.
- Required tools: Contact thermometer and bucket.
Descaling should follow the Furrion manual and installed service arrangement. It is not a cure for a failed igniter, unsafe flame, or wet control board.
When DIY Ends: Calling a Licensed Pro
Call an RV technician for E1 that returns, an ignition or flame-sense fault, soot, LP odor, damaged wiring, a blocked combustion path that is not plainly external, or a heat exchanger leak. Owners can verify water mode, coach power, LP level, outside vents, and the model code. Give the technician those notes and photos.
Frequently Asked Questions
Q: What does E1 mean on a Furrion tankless water heater? A: E1 is a model-specific fault commonly associated with ignition or flame proving. Read the code from the exact manual and stop if it returns after one safe reset. Do not bypass the flame safety.
Q: Why does my Furrion have power but no hot water? A: Check that the RV is not in winterize bypass, water flows at a large faucet, the LP supply is available, and the outside vents are clear. A flow call with no ignition needs professional diagnosis.
Q: Can I reset a Furrion tankless heater repeatedly? A: No. One reset after an obvious water, power, or outside-vent issue is reasonable. Repeated ignition cycles can fill an RV compartment with unburned propane. Leave it off and call an RV technician.