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Rocky Mountain Vending

Compressor Runs Non-Stop — Never Shuts Off

VendnetUSA 3155b

Cold DrinkMedium confidenceExact parts not verified
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Compressor Runs Non-Stop — Never Shuts Off

This issue indicates the refrigeration system is cycling improperly, potentially leading to overheating or component failure if not addressed immediately.

High VoltageTechnician8-12 min
Cooling6 stepstechnician-advanced

Qualified technician handoff: stop before live electrical testing, sealed-system refrigeration work, compressor service, or protected-compartment access unless a qualified technician is handling the work.

  • Evaporator fan motor confirmed failed: Flag for immediate motor replacement evaluation. Extended operation with failed fan can cause compressor damage.
  • Refrigeration relay stuck closed: Flag for immediate relay replacement. Compressor running continuously risks overheating and premature failure.
  • Sealed-system issue suspected: Mandatory escalation. Do not proceed without EPA certification. Create priority work order.
  • Burning smell or overheating detected at any point: Immediate power disconnect. Do not re-energize until cause is identified and corrected. Fire safety protocol.

Checklist

Guided Diagnostic Steps

Work from low-risk checks toward technician-level inspection only when evidence supports it.

Printable checklist

You can read or print the route now. The first checkbox click opens the service contact gate.

lead gated
  1. 1

    Check the door seal integrity around the entire perimeter for consist...

    technician-advancedlive-voltage

    Check the door seal integrity around the entire perimeter for consistent resistance.

    Qualified technician handoff: stop before live electrical testing, sealed-system refrigeration work, compressor service, or protected-compartment access unless a qualified technician is handling the work.

    Flashlight or Work LightDigital ThermometerDigital MultimeterInspection Mirror
    Stop conditions
    • If the issue persists after initial checks, immediate escalation is required; a qualified technician must assess the sealed system components.
    • If overheating or burning smells are present, immediately disconnect power and call for a qualified technician to diagnose the electrical or refrigeration fault.

    Expected: Initial condition is documented before deeper diagnosis.

    Evidence to note: note

  2. 2

    Visually inspect the condenser coil area for any visible buildup of d...

    technician-advancedlive-voltage

    Visually inspect the condenser coil area for any visible buildup of dust or debris.

    Qualified technician handoff: stop before live electrical testing, sealed-system refrigeration work, compressor service, or protected-compartment access unless a qualified technician is handling the work.

    Flashlight or Work LightDigital ThermometerDigital MultimeterInspection Mirror
    Stop conditions
    • If the issue persists after initial checks, immediate escalation is required; a qualified technician must assess the sealed system components.
    • If overheating or burning smells are present, immediately disconnect power and call for a qualified technician to diagnose the electrical or refrigeration fault.

    Expected: Initial condition is documented before deeper diagnosis.

    Evidence to note: note

  3. 3

    Close the door on a dollar bill or thin paper strip at multiple point...

    technician-advancedlive-voltage

    Close the door on a dollar bill or thin paper strip at multiple points around the perimeter.

    Qualified technician handoff: stop before live electrical testing, sealed-system refrigeration work, compressor service, or protected-compartment access unless a qualified technician is handling the work.

    Flashlight or Work LightDigital ThermometerDigital MultimeterInspection Mirror
    Stop conditions
    • If the issue persists after initial checks, immediate escalation is required; a qualified technician must assess the sealed system components.
    • If overheating or burning smells are present, immediately disconnect power and call for a qualified technician to diagnose the electrical or refrigeration fault.

    Expected: Result is documented before continuing the route.

    Evidence to note: note

  4. 4

    Inspect the condenser coil and airflow path for blockages.

    technician-advancedlive-voltage

    Inspect the condenser coil and airflow path for blockages.

    Qualified technician handoff: stop before live electrical testing, sealed-system refrigeration work, compressor service, or protected-compartment access unless a qualified technician is handling the work.

    Flashlight or Work LightDigital ThermometerDigital MultimeterInspection Mirror
    Stop conditions
    • If the issue persists after initial checks, immediate escalation is required; a qualified technician must assess the sealed system components.
    • If overheating or burning smells are present, immediately disconnect power and call for a qualified technician to diagnose the electrical or refrigeration fault.

    Expected: Result is documented before continuing the route.

    Evidence to note: note

  5. 5

    Listen for consistent fan noise while observing the evaporator area.

    technician-advancedlive-voltage

    Listen for consistent fan noise while observing the evaporator area.

    Qualified technician handoff: stop before live electrical testing, sealed-system refrigeration work, compressor service, or protected-compartment access unless a qualified technician is handling the work.

    Flashlight or Work LightDigital ThermometerDigital MultimeterInspection Mirror
    Stop conditions
    • If the issue persists after initial checks, immediate escalation is required; a qualified technician must assess the sealed system components.
    • If overheating or burning smells are present, immediately disconnect power and call for a qualified technician to diagnose the electrical or refrigeration fault.

    Expected: Result is documented before continuing the route.

    Evidence to note: note

  6. 6

    Measure the temperature sensor resistance at the connector using appr...

    technician-advancedlive-voltage

    Measure the temperature sensor resistance at the connector using appropriate testing equipment.

    Qualified technician handoff: stop before live electrical testing, sealed-system refrigeration work, compressor service, or protected-compartment access unless a qualified technician is handling the work.

    Flashlight or Work LightDigital ThermometerDigital MultimeterInspection Mirror
    Stop conditions
    • If the issue persists after initial checks, immediate escalation is required; a qualified technician must assess the sealed system components.
    • If overheating or burning smells are present, immediately disconnect power and call for a qualified technician to diagnose the electrical or refrigeration fault.

    Expected: Result is documented before continuing the route.

    Evidence to note: note

Tools for this route

Flashlight or Work LightDigital ThermometerDigital MultimeterInspection Mirror

Location Help

Where to find this

Use this as orientation before touching the machine. It is location help, not a repair instruction.

Refrigeration System

Start at the customer delivery bin and product drop path; clear visible product and debris before moving to internal checks.

  • Removes heat from cabinet interior to maintain product at target temperature.
  • Compressor
  • Condenser coil and fan
  • Evaporator coil and fan

Do not open sealed-system or compressor areas unless a qualified refrigeration technician is handling the work.

cabinet drinkspiral coildelivery bin sensorrefrigeration bay

Parts status

Exact public parts list not verified yet. Use this route to identify the system before ordering.

Candidate areas for part verification

Cooling componentsDoor Gaskets and SealsTemperature SensorsRefrigeration RelaysEvaporator Fan MotorsCondenser Fan Motors

Other Possible Issues

Switch routes if this symptom is not the closest match.

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