Can You Manually Light an Electronic-Ignition Water Heater?
On this page (4 sections)
The Short Answer: No. A heater with true electronic ignition has no standing pilot. Its control board opens the gas only after its safety checks pass, then lights the burner with a spark or hot surface igniter. A hand-held flame can’t replace those checks, and any gas already released could ignite all at once. Follow only the lighting or operating label. If that fails, call a technician.
Which kind of ignition do you have?
“Electronic pilot” is used loosely. Water heaters fall into three groups:
| What you see | Ignition type | How it’s lit |
|---|---|---|
| Knob with PILOT/ON/OFF, push-button igniter, sight glass, and maybe a status light; no power cord | Standing pilot, possibly with an electronic gas control | You light the pilot using the knob and igniter, exactly as the label says |
| Power cord or wired switch, blower on top, no PILOT position | Electronic ignition (power-vent, many high-efficiency tanks) | The control lights the burner automatically when heat is needed |
| Wall-mounted tankless unit with a display | Electronic ignition | Automatic whenever hot water flows |
Many modern tanks in the first group carry a label that says not to light them with a match. Their combustion chambers are sealed as part of the flammable vapor ignition resistant (FVIR) design. If yours has a status light but also a PILOT knob and igniter button, you light it with the built-in igniter. Bradford White’s procedure is an example, covered in Bradford White pilot light reset.
Why a match doesn’t help with electronic ignition
On an electronic-ignition heater, the control checks several things before it opens the gas valve. Depending on the model, these include:
- the blower is running and venting is proven
- the igniter is working or hot enough
- no flame is already present
Once the gas valve opens, the control must sense the flame within a few seconds or it shuts the gas off again. A match can’t make those checks pass. If the valve isn’t opening, there’s nothing for the match to light. If gas has leaked into the chamber because of a fault, a flame introduced by hand can ignite it suddenly. See water heater made a loud bang.
What to do when it won’t light
- Read the label. It describes the startup procedure and any reset steps for your model.
- Check power on electronic models. Make sure the heater is plugged in, its outlet or switch has power, and the breaker or GFCI hasn’t tripped. Reset a breaker or GFCI once only. After a power cut, see gas water heater not working after power outage.
- Check the gas. Make sure the supply valve at the heater is open and other gas appliances work.
- Note any status light or code and look it up in the manual for your model.
- On power-vent models, listen for the blower. If it doesn’t start, see water heater blower not working.
If it still won’t light after one attempt following the label, call a technician. Igniters, flame sensors, pressure switches and control boards are all diagnosed with the burner compartment open.
Frequently Asked Questions
Q: My old water heater had a pilot I could light with a long lighter. Why can’t I light the new one? A: Newer standing-pilot tanks use sealed combustion chambers and built-in igniters, and many labels prohibit lighting with a match. Electronic-ignition tanks have no pilot to light at all. Use the method on your heater’s label.
Q: The push-button igniter on my standing-pilot heater is broken. Can I use a lighter? A: Only if the lighting label on your heater describes lighting by hand. If it doesn’t, or if it says not to light with a match, have the igniter replaced. See water heater piezo igniter won’t spark.
Q: Can a tankless water heater be lit manually? A: No. Gas tankless units always light electronically when water flows. If one won’t ignite, check the gas supply, power and water flow, then look up its display code.
Manuals and supporting references
These links distinguish general safety information from model-specific documentation. A manual directory helps you locate your unit’s instructions; it does not establish that every model uses the same parts, codes, or test values.
- PG&E: recognizing and responding to a gas leak (opens in a new tab)Emergency actions for suspected fuel-gas leaks.
Editorial standards and corrections · Prepare a useful service request