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ErrBase

Traeger Error 40: Firepot Ignition Failure on WiFIRE Grills

Quick Answer

Traeger Er40 is a startup ignition failure. During Traeger's startup sequence, the controller feeds pellets into the firepot while the hot rod igniter heats up. If the grill does not reach the minimum threshold temperature (typically 125F) within the startup window (usually 7-10 minutes), Er40 triggers.

Traeger Er40 is a startup ignition failure. During Traeger's startup sequence, the controller feeds pellets into the firepot while the hot rod igniter heats up. If the grill does not reach the minimum threshold temperature (typically 125F) within the startup window (usually 7-10 minutes), Er40 triggers. The igniter rod is the most common cause - it is a resistive heating element that glows red-hot to ignite pellets, and it burns out after 2-4 years of regular use. You can verify the igniter by starting the grill and looking into the firepot after 2-3 minutes - the rod should be glowing bright orange. No glow means the igniter has failed ($20-35 replacement). The second cause is a firepot packed with old ash that insulates the igniter from the pellets.

TraegerPelletgrillSeverity: medium80% DIY Success
Time to Fix
10–60 min
Difficulty
beginner
Parts Cost
$20 – $35
Tools Needed
Shop vacuum (for firepot cleaning), Flashlight

What Does the Er40 Code Mean?

Er40 = grill failed to ignite during startup. Most common cause: igniter rod burned out (check for glow in firepot after 2-3 min startup). Second: firepot full of ash. Igniter replacement $20-35.

Most Likely Causes

Based on aggregated repair data, here is the probability breakdown for this error code:

Igniter rod burned out40%
Firepot full of ash insulating igniter24%
Damp pellets not catching fire14%
Cold weather slowing ignition12%
Igniter wire disconnected10%

Symptoms You May Notice

  • Er40 on display
  • Grill will not start
  • No smoke during startup
  • Pellets accumulating in firepot unburned
  • Igniter not glowing

Can you reset a Traeger pelletgrill to clear the Er40 code?

Turn the grill off. Unplug for 30 seconds. Plug back in. Set to shutdown cycle to clear the firepot. Then restart.

Tools Required for Diagnosis

Shop vacuum (for firepot cleaning)FlashlightMultimeter

Diagnostic Checklist

Follow these steps in order. We start with the easiest external fixes before opening up the machine.

1

Clean the firepot completely with a shop vac

Clean the firepot completely with a shop vac. Ash buildup insulates the igniter rod from contact with fresh pellets.

2

Start the grill and look into the firepot through the side after

3

Replace the igniter

Replacement Parts

If your diagnostic testing proves the component has failed, you will need a replacement. We recommend OEM parts over aftermarket for water-handling components.

Part Name
Traeger Hot Rod IgniterKIT0019 · $20–$35

Repair vs. Replace Calculator

Appliance Age (Years)7 Yrs
Labor Approach
Our Verdict
REPAIR
Estimated Cost: $28 (Parts) vs $1150 (New Machine)

Frequently Asked Questions

How long does a Traeger igniter last?
Typically 2-4 years with regular use (weekly cooking). The igniter is a consumable part like a spark plug - it wears from repeated heating cycles. Many Traeger owners keep a spare igniter on hand.
Can I manually light my Traeger if the igniter is dead?
Some users manually ignite pellets in the firepot with a propane torch, but Traeger does not recommend this. It bypasses the controller's startup sequence and can result in a dangerous flare-up. Replace the igniter instead - it takes 15 minutes.
Er40 only in cold weather - is my igniter OK?
Possibly. In very cold weather (below 20F), the igniter may take longer to heat up enough to ignite pellets. Try starting the grill with the lid open for the first 5 minutes to let the igniter heat without the cold grill barrel absorbing all the heat. If Er40 only happens in cold, the igniter is likely weakening and will fail completely soon.

Related Traeger Pelletgrill Error Codes

Code: HUBTraeger Error CodesCode: LErTraeger LEr: Low Temp

Models Known to Experience Er40 Errors

This repair applies to most Traeger pelletgrills with this error code. Common model numbers include:

Pro 575, Pro 780, Ironwood 650, Ironwood 885, Silverton 620

Last verified for technical accuracy on March 15, 2026