Traeger Pellet Grill Er4 — What It Means & How to Fix It
Er4 on a non-WiFi Traeger means the controller has lost its connection to the induction fan that feeds air to the fire.
What this code means
Traeger's article gives a single cause for Er4: the induction fan has been disconnected. The fan sits under the hopper and its wires are orange. With no fan the firepot cannot get the air it needs, so the grill stops instead of trying to burn.
Traeger lists Er4 only for pellet grills without WiFi connectivity. WiFIRE grills report fan faults with their own messages.
Most likely causes
| Cause | How likely | DIY-fixable? |
|---|---|---|
| Fan connector pulled loose under the hopper | Common | Partly — check the plug, grill unplugged |
| Fan connected but failed | Occasional | No — contact Traeger |
What you can try yourself
- Turn the grill off and unplug it.
- If your hopper has a bottom service panel, remove the screws holding it and take the panel off.
- Find the induction fan — follow the orange wires if it is not obvious — and make sure its connector is pushed firmly together.
- Refit the panel, plug the grill in and turn it on.
When to call a technician
- The fan is plugged in and Er4 still appears — Traeger says to contact Customer Support at that point.
- The fan blades are jammed or the wiring is melted.
Typical professional repair cost: Free if a loose connector was the cause. A failed fan is a replacement part arranged through Traeger support.
Frequently asked questions
Where is the induction fan on a Traeger?
Underneath the hopper, behind the bottom service panel on grills that have one. The fan's wires are orange, which makes them easy to trace.
Will my Traeger run with Er4 showing?
No. The fire needs the fan's airflow, so the controller holds the grill off until it can see the fan again.
Sources checked
Error meanings can vary by model. This guide was checked against the documentation above; use the manual for the model number on your own appliance when it differs.
Related Traeger codes
- Traeger Pellet Grill LEr LEr (Low Error Reading) means a non-WiFIRE Traeger dropped below 125°F for more than 10 minutes, so the fire is out and the grill has shut itself down.
- Traeger Pellet Grill HEr HEr (High Error Reading) means a non-WiFIRE Traeger climbed past 550°F — most often a grease flare-up — and switched itself off as a safety precaution.
- Traeger Pellet Grill Er1 Er1 (or Err) on a non-WiFi Traeger means the RTD temperature probe has a poor connection to the controller or has come disconnected altogether.
- Traeger Pellet Grill Er2 Er2 on a non-WiFi Traeger means the RTD temperature probe itself has failed and needs replacing.
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