Husqvarna Automower Error Codes: Every Alert Explained

Not Every Automower Alert Is About Charging or the Wire

Charging faults and loop signal problems get most of the attention because they're the most common, but Automower's display and Automower Connect app cover a wider range of alerts — tilt and lift triggers, collision sensor faults, weather-related delays, and on NERA models, GPS/EPOS status messages. This guide indexes the full picture and points you to the right dedicated fix for each category.

---

Try This First (2 Minutes)

• Read the exact message on the display or in the Automower Connect app rather than guessing from a blinking light alone
• Note whether the alert is a hard stop or just a delay (weather-related messages often resolve on their own)
• Check the app's history if you weren't there when the alert triggered
• Power cycle the mower using the main switch if the display seems frozen rather than showing an actual message

---

Charging and Loop Signal Alerts

These are by far the most common Automower alerts, and each already has a full dedicated guide rather than a brief summary here:

• "Charging system problem" / "Low battery" / stuck at the charging station: see our dedicated Husqvarna Automower won't charge guide for the full contact, dock, and power supply diagnostic path
• "No loop signal" / "Outside working area": see our dedicated Husqvarna boundary wire fault guide for the difference between a charging station signal fault and an actual wire break
• Blades not engaging despite normal driving: see our dedicated Husqvarna blade motor guide for debris, tilt cutoff, and coupling diagnostics

---

Fix 1: Tilt or Lift Sensor Triggered (Works Around 30% of the Time)

Automower cuts blade power immediately if it detects the chassis lifted or tilted past a safe angle — a safety feature working correctly, but one that can trigger on legitimately rough terrain too.

Safety note: Power off the mower and disconnect the battery before inspecting underneath the chassis.

How to Fix:

1. Check the lawn area for steep dips or uneven ground that could tip the mower past its rated angle
2. Inspect the sensor for mud or grass buildup that could cause a false trigger on level ground
3. Clean around the sensor housing with a dry brush
4. Restart from the display and watch the first pass over the affected area

Time: 10-15 minutes | Cost: Free | Success Rate: ~30% | Difficulty: Easy

If this doesn't work: Move to Fix 2 if the alert mentions a collision or bumper instead.

---

Fix 2: Collision Sensor Alert (Works Around 20% of the Time)

How to Fix:

1. Check the bumper for anything physically obstructing it from moving freely
2. Clear debris from around the bumper edge
3. Manually press the bumper to confirm it springs back on its own
4. Restart the mower and watch it navigate around a known obstacle

Time: 5-10 minutes | Cost: Free | Success Rate: ~20% | Difficulty: Easy

If this doesn't work: Move to Fix 3 if you're seeing a weather-related delay message.

---

Fix 3: Weather Timer or Rain Delay Message (Works Around 15% of the Time)

This isn't really a fault — Automower's Weather Timer feature deliberately delays mowing during and after rain to protect the lawn and reduce wear, and the message can look alarming if you're not expecting it.

How to Fix:

1. Check the app for a Weather Timer or rain sensor status rather than assuming a hardware fault
2. Confirm the rain sensor itself isn't dirty, which can cause it to falsely detect ongoing rain
3. Clean the sensor if needed and let the delay clear naturally
4. Adjust the Weather Timer sensitivity in the app if it's triggering more often than conditions justify

Time: 5-10 minutes | Cost: Free | Success Rate: ~15% | Difficulty: Easy

If this doesn't work: Move to Fix 4 if you own a NERA model and the alert is GPS/EPOS-related.

---

Fix 4: GPS/EPOS Status Alert (NERA Models, Works Around 10% of the Time)

NERA-line models use EPOS (Exact Positioning System) alongside the boundary wire, and a GPS-specific status message is a different alert category from a standard loop signal fault.

How to Fix:

1. Check the app specifically for a GPS/EPOS signal status rather than the loop signal indicator
2. Note whether poor signal correlates with dense tree cover or nearby structures
3. Allow the mower a few minutes to re-establish EPOS positioning after a firmware update or long idle period, since this is expected behavior, not a fault
4. If the message persists in open, unobstructed areas, treat it as a possible module issue

Time: 5-15 minutes | Cost: Free | Success Rate: ~10% | Difficulty: Easy

---

When DIY Won't Work - Repair vs Replace

Signs it's time for professional service:

• A tilt or collision alert keeps triggering on flat, obstruction-free ground with a clean, undamaged sensor
• A GPS/EPOS alert persists in open areas with no canopy or structures nearby
• The exact alert message doesn't match any category here or in your model's manual

Cost comparison: Everything above is free to check yourself. A dealer diagnostic for a suspected sensor or module fault typically runs $60-100.

Warranty check: A confirmed hardware fault in a sensor or the EPOS module is generally covered if the mower is still within its warranty period.

---

Prevent Future Alerts

• Clear the mowing area of debris and obstacles before scheduled cycles
• Clean sensors (tilt, collision, rain) on a regular schedule rather than waiting for a false trigger
• Keep firmware updated, since EPOS accuracy and alert logic both improve with updates
• Check the app's alert history periodically so patterns show up before a full stoppage

---

FAQ

Does Automower use numbered error codes?

Not in a simple numbered-list sense — the display and app show plain-text messages, and this guide groups them by category rather than by a formal code number.

Is a Weather Timer delay actually a problem?

No — it's a deliberate feature that pauses mowing during and after rain. It only becomes worth troubleshooting if the rain sensor itself seems to be triggering falsely.

What's different about NERA's alerts compared to older models?

NERA models add GPS/EPOS status messages on top of the standard loop signal and charging alerts that all Automower models share.

Is a tilt sensor trigger always a real fault?

Not necessarily — it's a safety feature that can trigger on legitimately steep or uneven ground. If it only happens in one specific spot, that's the terrain, not a fault.

Where do I find the full charging or boundary wire troubleshooting steps?

See our dedicated Husqvarna won't-charge guide and boundary wire fault guide — this article intentionally doesn't repeat that detail.

Are sensor or module faults covered under warranty?

A confirmed hardware fault is typically covered within the warranty period. Terrain and debris-related false triggers on your property generally aren't.