Commercial Dishwasher Troubleshooting: A Practical Guide for Foodservice Operators

In the fast-paced environment of commercial kitchens, a malfunctioning dishwasher can disrupt operations and compromise hygiene standards. Understanding common issues and their solutions is crucial for maintaining efficiency. This guide provides actionable troubleshooting tips to help you identify and resolve common commercial dishwasher problems.

1. Dishes Not Cleaning Properly

If dishes emerge dirty or streaked after a wash cycle, consider the following:

• Clogged Filters: Food particles can block filters, impeding water flow. Regularly remove and clean filters to maintain performance.
• Obstructed Spray Arms: Debris can clog spray nozzles. Detach and rinse them thoroughly to ensure proper spray coverage.
• Incorrect Detergent Usage: Using the wrong type or quantity of detergent can affect results. Always use commercial-grade detergent as recommended.
• Low Water Temperature: Inadequate temperature can hinder cleaning. Check that your water heater reaches at least 60°C (140°F).

2. Dishwasher Not Draining

Standing water at the bottom of the machine indicates a drainage issue:

• Blocked Drain Filters: Remove and clean drain filters to eliminate food residue or buildup.
• Kinked or Clogged Drain Hose: Inspect the hose for bends or obstructions and clear as needed.
• Faulty Drain Pump: If basic cleaning doesn’t resolve the problem, the drain pump may need repair or replacement.

3. Dishwasher Leaking Water

Leaks can lead to slippery floors and health risks:

• Damaged Door Gasket: Check the rubber seal around the door for wear and replace if cracked or loose.
• Loose or Cracked Hoses: Examine inlet and drain hoses for damage and secure connections.
• Overloading: Overfilling racks may prevent the door from sealing properly. Follow loading guidelines.

4. Unusual Noises During Operation

Strange sounds may indicate mechanical problems:

• Foreign Objects: Utensils or broken pieces may fall into the wash area. Check for and remove obstructions.
• Worn Bearings or Motor: Persistent noise could mean internal wear. Arrange for professional inspection.

5. Dishwasher Not Starting

If the machine won’t start at all:

• Power Supply Issues: Confirm the machine is plugged in and check that breakers haven’t tripped.
• Door Latch Fault: Dishwashers won’t run unless the door is securely latched. Inspect the latch for alignment.
• Control Panel Problems: If controls are unresponsive, a technical fault may need diagnosis and repair.

6. Dishwasher Overheating

Excess heat can damage internal components and your crockery:

• Blocked Vents: Ensure ventilation openings are unobstructed to allow heat to escape.
• Thermostat Failure: A faulty thermostat may cause overheating and should be replaced by a technician.

With regular maintenance and quick attention to issues, you can extend the life of your commercial dishwasher and avoid costly downtime. For spare parts, expert advice, and support, visit foodservicespares.com.