Dometic / Atwood RV Furnace Igniter Electrode – Part #35100

Restore strong, reliable ignition with the Dometic / Atwood Igniter Electrode, Part #35100. This OEM-style replacement electrode generates the spark that ignites propane inside your RV furnace burner assembly. If your furnace clicks repeatedly but fails to light, replacing a worn or cracked igniter electrode is often the fix.

Built to meet original equipment specifications, Part #35100 ensures proper spark positioning, consistent ignition, and dependable cold-weather performance.

Key Features:

• OEM Replacement Igniter Electrode – Part #35100
• Designed for Atwood / Dometic Direct Spark Ignition (DSI) furnaces
• Produces consistent spark for reliable burner ignition
• High-temperature resistant ceramic insulator
• Factory-style mounting for correct spark gap alignment
• Direct-fit replacement for compatible models

Common Symptoms of a Failing Igniter Electrode:

• Furnace clicks repeatedly but does not ignite
• Intermittent ignition or delayed flame
• Burner lights inconsistently
• Visible crack in ceramic insulation
• Weak or misaligned spark

Over time, heat cycling and vibration can cause the electrode to crack or shift out of alignment, preventing proper ignition.

Compatible With the Following Dometic / Atwood Furnaces:

AFLA Series

AFLA35211
AFLA35221
AFLA35231
AFLA40211
AFLA40221
AFLA40231

AFLD Series

AFLD35111
AFLD35121
AFLD35131
AFLD40111
AFLD40121
AFLD40131

AFMD Series

AFMD16111
AFMD16121
AFMD16131
AFMD16141
AFMD16151
AFMD20111
AFMD20121
AFMD20131
AFMD20141
AFMD20151
AFMD25111
AFMD25121
AFMD25131
AFMD25141
AFMD25151
AFMD30111
AFMD30121
AFMD30131
AFMD30141
AFMD30151
AFMD35111
AFMD35121
AFMD35131
AFMD35141
AFMD35151

AFSAD Series

AFSAD12111
AFSAD12121
AFSAD12131
AFSAD12141

AFSD Series

AFSD12111
AFSD12121
AFSD12131
AFSD12141
AFSD16111
AFSD16121
AFSD16131
AFSD16141
AFSD20111
AFSD20121
AFSD20131
AFSD20141

DFLA Series

DFLA35211
DFLA35221
DFLA35231
DFLA40211
DFLA40221
DFLA40231

DFLD Series

DFLD35111
DFLD35121
DFLD35131
DFLD40111
DFLD40121
DFLD40131

DFMD Series

DFMD16111
DFMD16121
DFMD16131
DFMD16141
DFMD16151
DFMD20111
DFMD20121
DFMD20131
DFMD20141
DFMD20151
DFMD25111
DFMD25121
DFMD25131
DFMD25141
DFMD25151
DFMD30111
DFMD30121
DFMD30131
DFMD30141
DFMD30151
DFMD35111
DFMD35121
DFMD35131
DFMD35141
DFMD35151
DFMD35121W

DFSAD Series

DFSAD12111
DFSAD12121
DFSAD12131
DFSAD12141

DFSD Series

DFSD12111
DFSD12121
DFSD12131
DFSD12141
DFSD16111
DFSD16121
DFSD16131
DFSD16141
DFSD20111
DFSD20121
DFSD20131
DFSD20141

Always verify your furnace model and confirm it uses Direct Spark Ignition (DSI) before ordering.

What’s Included:

• (1) Igniter Electrode – Part #35100

Mounting hardware may vary by furnace model. Inspect existing hardware during installation.

Installation Notes:

Disconnect 12V power and shut off propane before servicing your furnace. Proper spark gap alignment is critical — refer to your furnace service manual for adjustment specifications.

Frequently Asked Questions

What does the igniter electrode do?
It creates the spark that ignites propane in the burner chamber during the furnace start sequence.

Is this the same as the flame sensor?
In many Atwood/Dometic furnaces, the igniter electrode also serves as the flame sensing electrode.

Will this fix a furnace that clicks but won’t light?
If gas flow is present and the control board is functioning, a worn or cracked igniter electrode is a common cause of repeated clicking without ignition.

How do I know if mine is bad?
Look for cracks in the ceramic, weak spark, improper gap, or corrosion on the electrode tip.