Furrion Tankless E1 Ignition Failure

The Short Answer: Furrion tankless E1 is ignition failure / flame lost on light-off. The board tried, never proved fire, and locked out. That is LP, 12-volt brownout, spark, or a probe — not a Suburban DSI ritual. Photograph the interior panel. Soft-reset once. Do not keep firing into a propane smell. Sister hardware: Girard E1.

Search Intent & The Real Problem

The shower died. The interior Furrion panel shows E1. This is the FWTN-class ~42,000 BTU propane tankless (often Girard / Lippert guts under a Furrion badge), not a 6-gallon Furrion tank and not a Suburban SW6DE. It needs 12 V DC, LP at the rating-plate pressure, water flow, and a clear exhaust. Forest River, Grand Design, and Keystone bays get these boxes; the coach brand does not pick the part. Reset path on the sister: Girard reset.

Tank Furrion / Atwood electric ECO is a different door. Nautilus on-demand is Suburban tankless. Click-no-light on a stored tank: RV fires up then goes out.

What other guides get wrong

They paste Suburban DSI board steps onto a Furrion tankless. There is no standing pilot and no Suburban electrode. They treat E1 like E3 overheat or Fd freeze protection. They tell you to keep cycling the faucet through a dark burner. And they skip 12-volt brownout: a Furrion that “randomly” E1s at night is often a tired battery, not a gas valve.

Step-by-Step Troubleshooting

Step 1: Prove it is tankless E1 — then read the rest of the chart

• What to look for: The letter on the interior user control, twice. Photograph it before you cycle power. No code and no fan = flow, 12 V, or the exterior switch. Six-gallon tank with a red ECO is the wrong machine.
• Required tools: Phone camera, flashlight on the rating plate (FWTN vs tank).

E9 and a propane smell are not a reset. Shut bottles.

Step 2: 12 volt, LP, and water — before parts

• What to look for: Coach battery / converter. Rest voltage around 12.6 V; these boards get stupid under ~10.5 V. Bottles open, regulator not icing, stove lights. Isolation valves open, a solid stream at a hot faucet, no winterize bypass dumping around the unit. Inlet screen packed with grit mimics “dead heater” with a flow icon and no fire.
• Required tools: DC meter if you are qualified. Eyes on bottles. No union wrenches.

Furrion tankless wants LP near 11 in. w.c. minimum (plate often ~11–14 in. w.c.). House-tank numbers: NG ~3.5–7 in. w.c. / LP ~10–11 in. w.c. — confirm the rating plate. Manometer work is licensed. Do not crack a flare.

Step 3: E1 — spark, then fuel, then one lockout

• What to look for: Fan spins, spark you can hear with bottles closed for a spark-only listen, then gas on for one trial. No spark = igniter gap, cracked ceramic, or board. Spark, no flame = empty bottle, frozen regulator, or a valve that never opens. Flame, then E1/E2 = flame rod, wind in the exhaust, low LP as the tank cools.
• Required tools: Ears at the exterior door. Bottles closed for spark-only.

Two failed trials and the board lockouts. Soft-reset once after you fix fuel or 12 V: hot faucet off, wait, on — or cycle the interior switch per the card. A third E1 is a tech, not a ritual. Air after a bottle swap delays ignition — still do not purge fittings.

Step 4: Do not “fix” E1 with an E3 or Fd ritual

• What to look for: Setpoint cranked so the exchanger flashes over the ECO — that is E3, not E1. Let water run to cool. Fd on a 20°F night with bottles open is freeze protection doing its job. Bypass still in winterize means no water in the exchanger and a dry-fire path. Do not jumper the air-pressure switch to “see if it fires.”
• Required tools: Cabinet diagram. Power off before you spin a jammed blower by hand.

A power-vent house tank that never runs the blower has similar prove physics — blower not working — but Furrion parts are Furrion / Girard parts.

Step 5: Probes, leaks, and a heat exchanger that is actually done

• What to look for: Connector that pulled off during winterization (E0/E4). Water in the cabinet at the relief, a fitting, or the exchanger. Freeze-broken Furrions after someone stored the coach with water in the unit and Fd off. Scale in hard-water parks that overheats into repeating E3 after you clear E1. Thermocouple ~20–30 mV is a 6-gallon tank valve, not this flame rod. 4500 W / 240 V ~18.8 A / ~12–13 Ω is a house element. T&P typical 150 psi / 210°F — never cap a streaming RV relief.
• Required tools: Paper towel. None on LP fittings.

A rumbling, leaking 10-year box is replacement, not a second Amazon igniter. Need the bay dark? Shut bottles and 12 V — apartment shutoff physics in a coach.

When DIY Ends: Calling a Licensed Pro

You may photograph E1, confirm 12 V and bottles, hear spark with fuel off, and soft-reset once after you fix the cause. Stop at propane odor, a bang, a wet cabinet, a jumpered switch, and any valve or board swap you cannot leak-test. A mobile RV tech is cheaper than a fifth ignition trial in a closed bay. Sister tank LP path if you actually have a 6-gallon: Suburban not working on gas.

Frequently Asked Questions

Q: What does E1 mean on a Furrion tankless water heater? A: Ignition failure. The board tried to light, never proved flame, and locked out. Confirm the sticker on that panel. It is not an electric ECO reset on a 6-gallon tank.

Q: How do I reset a Furrion E1 code? A: Fix LP, 12 V, and flow first. Shut the hot faucet 15–30 seconds or cycle the interior switch per the card, then one trial. If E1 returns, stop. Repeated resets dump unburned LP.

Q: Is a Furrion tankless the same as a Girard? A: Many FWTN-class Furrions share Girard / Lippert guts and the same E0–E9 / Fd map. Use the sticker on your panel. Parts still have to match the badge and the model number.