AccuTemp Steamer Ignition Module LED: 1 Flash, Blocked Venting
One flash from the LED on an AccuTemp Evolution gas steamer's ignition module signals blocked air venting or no blower pressure. The burner will not light until the module sees combustion air moving. Switch the steamer off, look for anything blocking the vent outside, try once, and call us.
High: the burner is locked out and the steamer will not heat until combustion air is restored.
- Code
- Ignition module LED: 1 flash
- Maker
- AccuTemp
- Equipment
- Steamers & kettles
- Applies to
- Evolution Gas steamer ignition module
What does AccuTemp Ignition module LED: 1 flash mean?
Ignition module LED: 1 flash is how the spark ignition module on an AccuTemp Evolution gas steamer reports a combustion air problem. Before the module allows the burner to light, it wants proof that air is moving through the burner system. The blower starts, builds pressure, and a pressure proving connection tells the module that the vent path is open. If that proof never arrives, the module holds the gas valve closed and blinks once to say why. Lighting a burner without proof of air could push exhaust back into the room or starve the flame, so the module refuses. You will find the burner does not light, the steamer does not heat, and the blower may run or not depending on where the break is. The usual places to look are a vent that is blocked and a blower that is not building pressure. A flash code is a reading from a safety circuit, so it should be respected rather than worked around.
Affected models and control systems
This applies to the spark ignition module on AccuTemp Evolution gas steamers, as described in the Evolution Gas/Propane service manual. The flash count belongs to this module, and other ignition controls count flashes differently.
Code numbers and their meaning can change between control generations. We match the full model and control before acting on a code.
What you may notice
- The LED on the module blinks once in a repeating pattern
- The burner does not light
- The steamer never heats
- The blower runs but the burner stays dark, or the blower stays quiet
Possible causes
Listed in AccuTemp's documentation
- Air vent or flue blocked
- Blower not moving air or building pressure
- Pressure proving connection not closing
- Wiring to the ignition module open or loose
Other likely causes — what usually sits behind Ignition module LED: 1 flash on this control. A technician confirms which one it is before any part is replaced.
- A vent terminal outdoors that has a box, a bird nest or ice against it and starves the burner of air
- A pressure tube between the blower and the proving switch that has cracked or come loose
Safe checks before calling for service
- If you smell gas, step outside and phone the gas company before anything else.
- Switch the steamer off and let it cool.
- Look at the outside vent area for anything blocking it, such as boxes or debris.
- Switch the steamer on once.
- If one flash returns, stop and call us. Tell us what the vent looked like and whether the blower was audible.
How a technician diagnoses Ignition module LED: 1 flash
- Confirm the flash count on the module LED and note whether it repeats at every start.
- With gas off, inspect the vent and flue for obstruction.
- Check that the blower runs and builds pressure.
- Test the pressure proving switch and its tubing for continuity and leaks.
- Check the module wiring, then replace a part only after its test fails.
- Combustion air on a gas appliance has to be verified with proper instruments, and guessing can leave exhaust spilling into the kitchen.
- The blower and pressure proving connection sit inside the gas compartment, which an operator should not open.
- A blocked vent can also affect how exhaust leaves the building, so the whole vent path needs to be inspected.
How Ignition module LED: 1 flash differs from similar codes
Two and three flashes on the same LED report different things: flame sensed at the wrong time and ignition lockout. One flash is about air alone.
Technical reference
- Document
- SP8026-1902 p.23
- Maker documentation
- AccuTemp owner support
- Edition
- SP 8026-1902 (current revision 1902, prior revision 1201)
- Models / control
- Evolution Gas steamer ignition module
- Section
- 3.1 Troubleshooting Table: -1F / -99F printed p. 16; Ignition (Spark) Module LED indications (ref letter L) printed p. 24
- Checked
- October 2026
We use the maker's document to read the code and do not reproduce it. Always confirm the complete model and control before applying these steps.
Related AccuTemp steamer & kettle error codes
Is one flash a gas leak?
No. It reports a problem proving combustion air, not a leak. If you smell gas, though, leave the building and call the gas company.
Can I reset it and keep cooking?
One restart is fine, but if the flash returns the module is protecting you from an unsafe light, so do not keep forcing it.
Does a blocked vent damage the steamer?
Poor venting leaves the burner short of air, so heating and burner life both suffer. Clearing the vent and testing the blower is the right fix.
Need help with AccuTemp Ignition module LED: 1 flash?
A technician confirms the cause on site and gives you the price in writing before any work starts.