Honeywell Water Heater Igniter No Spark
The Short Answer: A Honeywell-stamped gas control with no spark is lockout, no 120 V, a cracked electrode, or a dead module — not a $12 thermocouple. Spark with a dark burner is gas, not the igniter. One trial through the port. If you smell gas, leave.
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Search Intent & The Real Problem
The tank is ice. You crouched at a Resideo / Honeywell valve and waited for a snap at the burner. Nothing. Forums sold you a piezo button and a match. Honeywell is the control brand, not the tank. That same valve sits on Rheem, Ruud, Richmond, AO Smith, State, American, and Reliance jackets. Some spark. Some glow. Some still have a standing pilot and a red button. “No spark” on a hot-surface unit is the wrong complaint. “No spark” on a standing-pilot unit is a piezo. This page is electronic ignition that never jumps.
Generic dark burner: burner not lighting. Lights then dies: will not stay lit. Do not match-light a chamber the jacket forbids.
What other guides get wrong
They treat every Honeywell as a push-button piezo. Intelli-Vent and many FVIR electronics have no button. They tell you to sand a 120-volt hot-surface bar with the gas on. They paste a Rheem electric 5-flash onto a gas LED. And they skip the sticker, so a 7-flash flammable-vapor lockout gets a new electrode while gasoline is still in the garage — chamber sensor.
Step-by-Step Troubleshooting
Step 1: Prove which “Honeywell igniter” you actually have
| What is on the tank | Spark / glow comes from | This page? |
|---|---|---|
| Electronic gas control, status LED, no standing pilot, tick then flame | Spark electrode + module in the valve | Yes |
| Electronic control, orange glow in the port, then gas | 120 V hot-surface igniter | Yes — glow, not spark |
| Standing pilot, red/black push-button | Piezo crystal | No — piezo |
| Blower on top, 120 V cord, inducer must spin first | Power-vent DSI or HSI | Yes, after the fan proves |
| Electric tank, two access doors, no gas valve | There is no igniter | 5 flashes |
| Jacket: “do not light with a match” | Electronic FVIR | Yes. No match. |
- What to look for: Rating plate, lighting card, a phone photo of the Honeywell / Resideo sticker on the valve. AO Smith / State HSI cousins: State Select igniter. Rheem-family valves: Richmond gas valve.
- Required tools: Flashlight. No matches until that card describes them.
Step 2: Count the LED before you blame the ceramic
Typical Honeywell / Resideo water-heater stickers (the label on your valve wins — charts are not universal):
| LED (common atmospheric / power-vent) | Meaning | Igniter? |
|---|---|---|
| Short flash every few seconds | Idle / normal | No |
| Heartbeat | Calling for heat | Wait for the trial |
| 3 flashes (many power-vent) | Pressure switch / blower | Blower — do not fire it |
| 4 flashes | ECO / high-limit | Find the overheat; never jumper |
| 6 flashes | Failed trial for ignition | This page — spark/glow or gas |
| 7 flashes | FVIR / flammable-vapor | Not an igniter wipe — chamber sensor |
| Dark LED, 120 V control | No power to the valve | Outlet, switch, GFCI |
- What to look for: A full cycle twice before you kill power. One slow green with hot water is not a dead igniter — flashing green. Multi-flash “electronic fault” language: electronic fault.
- Required tools: Watch, phone photo of the LED and the door sticker.
A 7-flash after painting or a mower in the closet will never spark no matter what electrode you buy. Resetting that into vapors is how you get a bang.
Step 3: One look through the port — spark, glow, or dark
- What to look for: Cover on. One heat call per the jacket. Spark: a snap you can see at the ceramic, then gas, then blue. No snap at all = open electrode, unplugged boot, grounded rod, or a module that never fired. Snap, dark burner = cock closed, empty LP, valve, or air after a relight — not a second igniter. HSI: orange for several seconds, then gas. No glow = open bar or no 120 V at the connector. Brief flame, then lockout = flame sense, not the igniter.
- Required tools: Ears and eyes. One trial. Do not pull an FVIR door you cannot reseal.
Spark-test with the appliance cock off if you only need to see whether the electrode jumps. Then leave the cock off until a licensed tech is there if it never lit. Do not keep clicking fuel into a dark chamber. Smell after a click: leave.
A hairline crack through a ceramic insulator grounds the spark to the bracket. A gray split through a glow bar is the same story on HSI. Do not ohm either part live.
Step 4: Power, blower, and gas — without opening the pipe
- What to look for: Electronic and power-vent Honeywells need house power. Outlet live, emergency switch on, GFCI not tripped. After a storm start at dead after a power outage, not a new electrode. Inducer must spin and the pressure switch must prove before spark; a silent blower is CO if anything burns — blower not working. Appliance shutoff parallel to the pipe. Other gas appliances lighting. LP bottle not empty; a frosted first-stage regulator starves the trial.
- Required tools: Eyes. No fittings wrenches. Do not purge the union.
Manifold pressure is licensed: natural gas about 3.5–7 in. w.c., LP about 10–11 in. w.c. at the appliance — confirm the rating plate. A spark you can see does not measure gas. A 1/2-inch kinked flex on a high-BTU power-vent looks like a “bad igniter” all afternoon.
Standing-pilot Honeywells that still use a thermocouple should make ~20–30 mV once a pilot exists. Electronic spark valves are not that part. Thermopile millivolt electronics live in the hundreds of millivolts — a weak pile browns the board out so it never sparks.
Step 5: FVIR, water in the tray, and one reset — then stop
- What to look for: Lint packed in the flame-arrestor under a post-2003 tank (dryer in the same closet). Gasoline, paint, solvent. Water or a rust ring in the combustion chamber: the tank is dead; shut gas. One power cycle or knob-to-OFF after you fix the obvious cause — Honeywell reset. Same lockout on the next call is the end of DIY. Need it dark while you wait? Shutoff.
- Required tools: Flashlight at the base, gas off. No paperclip in the control. No “universal Honeywell” from a blister pack that does not match FVIR, NG/LP, or millivolt vs 120-volt.
A perfect new electrode cannot light a burner the valve is holding closed on a safety. Ten retries glaze the next igniter and flood the closet.
When DIY Ends: Calling a Licensed Pro
Stop at gas odor, delayed-ignition bangs, a 7-flash vapor lockout, a silent power-vent, water in the tray, a melted harness, and any gas-valve work. You may photograph the LED, confirm the shutoff, and watch one spark or glow trial through the port. Electrode or HSI replacement inside an FVIR chamber, manometer work, and control swaps are licensed. A cracked ceramic is a parts job. A weekend of clicking is how you buy the next one already glazed.
Frequently Asked Questions
Q: Why does my Honeywell water heater igniter have no spark? A: Lockout LED (often a 6-flash failed trial or a 7-flash FVIR), no 120 V to an electronic or power-vent control, a cracked electrode, a dead module, or you are looking at a hot-surface igniter that glows instead of sparking. Spark with no flame is gas, not the igniter.
Q: Can I replace a Honeywell water heater igniter myself? A: The ceramic is a part, but it lives in an FVIR combustion chamber on most tanks. If you cannot reseal that door, hire a licensed plumber. Do not jumper it. Do not keep cycling a dark burner.
Q: The igniter sparks but the burner never lights. Is the igniter bad? A: No. Spark proved the igniter. Confirm the shutoff and stop — that is gas, the valve, or a licensed purge after a relight. Do not crack the union.