Cooling system noise or rattle

Cooling alerts often come from restricted airflow, dirty coils, or temperature sensor drift. Identify loose panels or fan issues.

• Verify condenser and evaporator fans are spinning.
• Check vents for obstructions and airflow blockage.
• Confirm the temperature sensor is secured and reading.

• Clean condenser coils and clear airflow paths.
• Reduce door-open time during restocks.
• Reboot after temperature stabilizes.

• Clean coils every 60–90 days.
• Keep units away from heat sources.
• Inspect door gaskets for leaks.

• Temperature fails to recover after cleaning.
• Repeated high-temp alerts in a day.
• Compressor short cycles or does not start.

Learn more at /haha-coolers.

• Confirm all steps are documented so the next technician can reproduce the results.
• Capture before/after metrics (errors cleared, sales restored, or uptime improved).
• Review machine, reader, or route settings to ensure they match location standards.

• Skipping a controlled test leads to false positives.
• Updating hardware without documenting configuration changes.
• Forgetting to verify payout, refund, or reconciliation data after changes.

• Run a final test with known-good inputs.
• Log the outcome with date, time, and device identifiers.
• Schedule a follow-up check if the location has high traffic or seasonal demand.

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• Document changes with time, machine ID, and location name.
• Verify settings, pricing, and service modes after each fix.
• Capture before/after results to confirm resolution.

• Test with known-good inputs and controlled conditions.
• Validate telemetry, alerts, and payment logs where applicable.
• Confirm location expectations and update the site contact.

• Configuration drift after firmware or component swaps.
• Inconsistent power or network conditions at the location.
• Gaps in preventive maintenance routines.

• Monitor for 7 days and note any repeat errors.
• Schedule follow-up if the site is high-traffic.
• Escalate with full logs and photos if issues repeat.

• Validate camera calibration and lighting conditions.
• Confirm planogram and SKU mapping are accurate.

• Verify load accuracy to reduce mischarges.