How to Troubleshoot a Dash Cam That's Not Recording

A dash cam that appears to be on but isn't actually recording is the worst of both worlds — you think you're protected, but you're not. This is more common than most drivers realize, and the cause is almost always one of five things.

Here's a systematic diagnostic process to identify and fix the issue.

Step 1: Confirm It's Actually Not Recording

First, verify the problem is real. Some cameras have indicator systems that are easy to misread:

• Check the status LED. A solid red or green light typically means recording is active. A blinking LED often means standby or error — consult your camera's manual for your specific model's LED behavior.
• In the Nexar app, check whether a trip is showing as in-progress. If a trip appears in the Trips list for today with an ongoing route line, the camera is recording regardless of what the LED indicates.
• Take a short drive and check the app immediately after. If no trip appears, recording is genuinely not occurring.

Most Common Cause #1: SD Card Problem

SD card failures account for the majority of "not recording" reports. The issue can be:

• Card full with no valid files to overwrite: Some cameras stop recording if the card is completely full of locked files (files locked by G-sensor events). Format the card in the camera — not the computer — to clear it.
• Card corruption: A corrupted filesystem prevents the camera from writing new files. Symptoms include the camera freezing on the startup logo or the card not appearing as mounted in the camera's file browser. Fix: format the card in the camera.
• Card speed insufficient: If you installed a new SD card that's slower than the camera requires, recording may fail silently. The camera may appear to record but produce empty or corrupted files. Use a U3 rated card minimum.
• Card seated incorrectly: The SD card slot on most cameras clicks when fully inserted. A partially inserted card may cause intermittent recording or no recording. Remove and reseat firmly.
• Card wear-out: SD cards used in dash cams wear out faster than general-use cards due to constant write cycles. Standard cards typically fail within 6–12 months of continuous dash cam use. High-endurance cards last 2–4x longer. If the card is more than a year old and heavily used, replace it.

Fix for SD card issues: Remove the card, insert into a computer using a card reader, check if files are visible. If no files appear or the computer can't read the card, format it in the camera. If formatting fails or the camera still doesn't recognize the card, replace the card.

Most Common Cause #2: Power Issue

If the camera isn't receiving consistent power, it may not record, may restart repeatedly, or may record in short fragments:

• Loose cigarette lighter connection: The most common power issue for socket-powered cameras. The socket contact can be loose or dirty. Try a different socket, or use a contact cleaner spray. Check that the plug is firmly seated — a 1mm gap can cause intermittent dropouts.
• USB cable failure: USB cables fail at the connector end. Bend the cable gently near the plug — if the LED flickers, the cable is failing. Replace the cable.
• Socket fuse blown: Some vehicles' accessory sockets are fused separately. If the socket powers nothing (test with a phone charger), check the corresponding fuse in the vehicle's fuse box.
• Hardwire kit connection: If hardwired, a loose connection at the fuse tap or wire splice can cause intermittent power. Check all connection points and confirm the fuse tap is fully seated.

Most Common Cause #3: Overheating

Dash cams are exposed to significant heat, particularly on the windshield in direct summer sunlight. Most cameras have thermal protection that stops recording when internal temperature exceeds a threshold — typically 70–80°C.

Signs of thermal shutdown:

• Recording stops after 20–40 minutes in hot weather
• Camera stops recording in the afternoon but works fine in the morning
• The housing is too hot to touch comfortably

Fixes:

• Move the camera out of direct sunlight — position it behind the rearview mirror where the mirror itself provides shade.
• Use a sunshade when parked to reduce interior temperature.
• Some cameras have a temperature readout in the app settings — check this if you suspect overheating.
• Consider a camera model with better thermal design if overheating is persistent in your climate.

Most Common Cause #4: Settings Issue

Recording may be disabled through settings, either intentionally or accidentally:

• Recording paused in app: Some cameras allow recording to be paused via the app. Check Settings → Camera → Recording and confirm recording is set to Auto or Always On.
• Storage full with auto-delete disabled: If the camera's loop recording (auto-overwrite) is disabled and storage is full, recording stops. Enable loop recording in camera settings.
• Scheduled recording: Some cameras support time-based recording schedules. If a schedule was set incorrectly, the camera may only record during certain hours. Check and disable any recording schedule.

Most Common Cause #5: Firmware or App Issue

A firmware bug or app connectivity issue can cause the camera to appear offline or non-functional:

• Check for a firmware update and install it.
• Force-close the app and reopen.
• Disconnect and re-pair the camera in the app.
• If the camera's LED shows normal operation but the app shows no trips, the issue may be a cloud sync problem rather than a recording problem — the camera may be recording to the SD card but not syncing to the app. Check the SD card directly for files.

The 5-Minute Diagnostic Sequence

1. Check LED status against your model's manual.
2. Remove and reseat the SD card. Reformat if uncertain.
3. Wiggle the power cable — if LED flickers, replace cable.
4. Check app settings — confirm recording is enabled and loop recording is on.
5. Check firmware version — update if not on latest.
6. Take a 5-minute test drive and confirm a trip appears in the app.

This sequence resolves the vast majority of "not recording" reports without needing to contact support or return the camera. If you've completed all steps and recording still doesn't occur, contact Nexar support with your camera serial number (printed on the unit sticker) and the firmware version — they can diagnose remotely via log access.