Why Is My Commercial Glasswasher Overflowing?

A commercial glasswasher is designed to control how much water enters, remains in and leaves the machine.

When that process isn't working correctly, the water level may become too high.

Depending on the glasswasher design and symptoms, possible causes can include:

• Water-level sensing problems

• Pressure-system problems

• Water inlet valve faults

• Filling-system problems

• Drainage restrictions

• Blocked filters

• Blocked or restricted drain hoses

• Drain pump problems

• Incorrectly positioned or obstructed components

• Electrical or control faults

• Excessive foaming

• Installation or waste-system problems

The exact components vary between machines.

That's why:

"It's Overflowing" Is the Symptom. We Still Need to Find the Cause.

Is My Glasswasher Overflowing or Leaking?

This distinction matters.

An Overflow

An overflow generally involves too much water, foam or liquid reaching somewhere it shouldn't because water level, filling, drainage or another process isn't operating normally.

A Leak

A leak may occur even when the water level inside the machine is normal.

Possible leak sources can include:

• Hoses

• Connections

• Seals

• Pumps

• Valves

• Internal plumbing

• Door or hood areas

The two problems can look almost identical once the water reaches the floor.

That's why the puddle itself doesn't tell you what failed.

Water level normal but the machine is still leaking?

Troubleshoot Commercial Glasswasher Leaking Water →

Commercial Glasswasher Keeps Filling With Water

Does the Water Keep Coming In?

A glasswasher should control its filling process.

If water continues entering when it shouldn't, the filling and water-level systems may need investigation.

Depending on the machine, possible areas can include:

• Water inlet valve

• Solenoid valve

• Water-level sensor

• Pressure switch or pressure system

• Associated tubing

• Controls

• Wiring

• Other machine-specific filling components

The key question is:

Does the Machine Know It Has Enough Water?

If the system responsible for detecting or controlling water level isn't operating correctly, filling may not stop when expected.

Commercial Glasswasher Water Level Too High

A glasswasher doesn't necessarily need to pour water onto the floor before there is a problem.

An unusually high water level inside the machine may be an earlier warning sign.

Staff may notice:

• Water sitting higher than normal

• Water approaching the door or opening

• Water escaping during a cycle

• Unusual splashing

• Poor wash performance

• Slow draining

• Water remaining after a cycle

• Intermittent overflowing

If the normal water level has changed, investigate why rather than treating the higher level as normal operation.

Commercial Glasswasher Water-Level Sensor Problems

Commercial glasswashers use machine-specific systems to determine or control water level.

Depending on the design, these may include pressure-based systems, switches, sensors or other controls.

If the water-level system isn't correctly detecting conditions inside the machine, filling behaviour can become abnormal.

Possible symptoms can include:

• Overfilling

• Underfilling

• Filling that doesn't stop

• Intermittent filling problems

• Abnormal water levels

• Cycle problems

However, abnormal filling doesn't automatically mean the sensor itself has failed.

Associated tubing, pressure conditions, wiring, controls or other components may be responsible.

Test the System Before Replacing the Sensor.

Commercial Glasswasher Pressure Switch Problems

Some commercial warewashing equipment uses pressure-related systems as part of water-level control.

If the machine isn't correctly detecting its water level, relevant components may need inspection.

But replacing a pressure switch based solely on an overflowing symptom can be premature.

The problem may instead involve:

• Associated tubing

• Blockages

• Air leaks

• Connections

• Water-level conditions

• Electrical connections

• Controls

• Another part of the filling system

Correct diagnosis means testing the system rather than guessing which component has failed.

Commercial Glasswasher Inlet Valve Problems

The inlet valve controls incoming water.

Depending on the machine and fault, an inlet valve that isn't operating as intended can contribute to abnormal filling.

One useful diagnostic observation is when water enters the machine.

For example:

Does it only overfill while switched on?

Does water continue entering after the expected fill has finished?

Does the water level rise while the machine is sitting idle?

These details can help narrow down the problem.

Tell Us Exactly When the Water Starts Rising.

Why Does My Glasswasher Fill With Water When It's Turned Off?

If the water level rises while the machine isn't actively calling for water, stop treating it as a normal filling cycle.

Depending on the equipment, the incoming-water system may require investigation.

A valve that isn't closing correctly is one possible cause, although diagnosis is required before assuming a particular component has failed.

If water continues entering unexpectedly, arrange for the equipment to be inspected.

Can a Blocked Drain Make a Glasswasher Overflow?

Yes, drainage problems can contribute to abnormal water levels.

Think of the system as two sides:

Water needs to enter correctly.

and

Water needs to leave correctly.

If the machine can't remove water as intended, subsequent filling or operating cycles may result in an abnormal water level.

Possible drainage problems can include:

• Blocked filters

• Drain restrictions

• Kinked or obstructed drain hose

• Drain pump problems

• Drain valve problems

• Waste connection issues

• Internal blockages

This is why an overflowing glasswasher isn't automatically a filling problem.

Sometimes the machine is receiving the correct amount of water but isn't getting rid of it correctly.

Water remaining inside the machine?

Troubleshoot Commercial Glasswasher Not Draining →

Glasswasher Overflowing During the Wash Cycle

Does the machine fill normally but water begins escaping once washing starts?

That's an important distinction.

Possible factors may include:

• Excessive water level

• Excessive foaming

• Abnormal spray direction

• Wash-arm problems

• Door or hood sealing

• Loading

• Drainage problems

• Other wash-system conditions

The machine may therefore appear to be "overflowing" even though the original problem occurred earlier in the cycle.

Knowing exactly when water first escapes can make diagnosis considerably easier.

Glasswasher Overflowing During Filling

If water escapes while the glasswasher is actively filling, the water-level and inlet systems become particularly relevant.

Questions that help include:

• Does filling stop at all?

• Does it fill much longer than normal?

• Does the water level continue rising?

• Is the problem intermittent?

• Did the problem begin suddenly?

• Has anything recently been repaired or adjusted?

Tell the technician what you've observed rather than trying to identify the component yourself.

Glasswasher Overflowing During Draining

An apparent overflow during draining may indicate a different problem.

Water may be backing up because it cannot move through the drainage or waste system correctly.

Potential areas for investigation can include:

• Drain hose

• Drain pump

• Drain valve

• Waste connection

• Restrictions

• Blockages

• Installation

It is also important to determine whether the water is actually overflowing from the machine or backing up from an external waste connection.

Why Does My Glasswasher Overflow Intermittently?

Intermittent Problems Still Have Causes.

A machine that overflows once and then operates normally for ten cycles can be particularly difficult for staff to understand.

Don't dismiss the problem simply because it disappeared.

Intermittent behaviour may relate to changing operating conditions or a component that isn't behaving consistently.

Useful information includes:

• Which stage of the cycle it occurs in

• Whether the machine was heavily used beforehand

• Whether water was already inside it

• Whether it had drained completely

• Whether excessive foam was present

• Whether it happens after particular racks

• Whether restarting the machine changes anything

These details can help recreate and diagnose the fault.

Could Excessive Foam Make My Glasswasher Overflow?

Potentially.

A machine filled with foam can appear to be overflowing even when the underlying problem involves chemicals rather than water-level control.

Commercial glasswashers require appropriate commercial chemicals and suitable dosing.

Excessive foaming may be associated with:

• Unsuitable detergent

• Excessive chemical dosing

• Chemical contamination

• Incorrect product

• Residue introduced with glassware

• Other operating conditions

If the overflow started after changing chemicals or adjusting dosing, tell the technician.

Don't Try to Solve Foam by Adding More Chemical.

Seeing unusual chemical consumption or excessive foam?

Troubleshoot Commercial Glasswasher Chemical Dosing Problems →

Can Hand Dishwashing Liquid Make a Commercial Glasswasher Foam?

Hand dishwashing detergents are designed to produce foam and generally aren't intended for use as commercial glasswasher machine detergent.

Introducing a high-foaming product into a commercial glasswasher can interfere with normal operation and create large amounts of foam.

Use chemicals intended for the equipment and follow the chemical and equipment suppliers' instructions.

If an unsuitable chemical has accidentally been introduced, don't keep running cycles in the hope that the problem will disappear.

Why Does My Glasswasher Overflow After Several Cycles?

This is useful information for diagnosis.

If the machine starts normally but the water level becomes abnormal after repeated cycles, consider whether:

• Water is draining correctly

• The water level is returning to normal

• Foam is accumulating

• The problem occurs at a particular cycle stage

• The machine is behaving differently as operation continues

Don't assume the machine is fine because the first cycle works correctly.

Tell us how the behaviour changes over time.

Glasswasher Filling and Draining at the Same Time

If the machine appears to be taking in and losing water unexpectedly, the filling, drainage and water-level systems may need investigation.

The exact sequence of filling and draining varies between glasswasher designs, so what is normal for one machine isn't necessarily normal for another.

Rather than assuming a component is faulty based on the sound of running water, look for other signs such as:

• Abnormal water level

• Continuous filling

• Poor cleaning

• Long cycle times

• Water remaining in the machine

• Water escaping onto the floor

Machine-specific diagnosis is important.

Is an Overflowing Glasswasher Dangerous?

Escaping water in a commercial kitchen or bar should not be ignored.

Depending on the severity and location, overflowing water can contribute to:

• Slip hazards

• Water reaching electrical components

• Damage to surrounding equipment

• Damage to flooring or cabinetry

• Corrosion

• Operational disruption

• Further equipment damage

If water is creating an electrical or workplace safety hazard, stop using the equipment and follow appropriate workplace safety procedures.

Should I Keep Using an Overflowing Glasswasher?

If a glasswasher is repeatedly overflowing, continuing to operate it without understanding the cause isn't a good solution.

A recurring overflow means something about the machine's water, drainage, chemical or operating conditions requires attention.

Repeatedly:

mopping the floor → restarting the machine → running another rack

doesn't repair the underlying fault.

Stop Managing the Symptom and Find the Cause.

What Staff Can Check Before Calling a Technician

You don't need to dismantle the glasswasher.

A few simple observations can provide valuable diagnostic information.

When Does It Overflow?

During filling?

Washing?

Rinsing?

Draining?

After several cycles?

While switched off?

Is the Water Level Higher Than Normal?

If you know what the normal operating level looks like, tell us whether it has changed.

Is the Machine Draining?

Does water remain after the cycle?

Is There Excessive Foam?

Foam points the investigation in a different direction.

Is Water Still Entering?

Does the machine appear to continue filling after it should have stopped?

Did Anything Change Recently?

For example:

• Chemical product

• Dosing adjustment

• Plumbing work

• Machine relocation

• Service or repair

• Drainage work

These details can help.

Don't Start Replacing Parts Based on the Symptom

An overflowing glasswasher may look like a simple water-level sensor problem.

But several systems can influence the final water level.

For example:

The machine could be taking in too much water.

Or it could be failing to detect the correct water level.

Or it could be failing to drain the previous water correctly.

Or excessive foam could be escaping from a machine with an otherwise normal water level.

Those scenarios don't require the same repair.

Same Symptom. Different Causes.

That's why diagnosis comes first.

How We Diagnose an Overflowing Commercial Glasswasher

1. Tell Us What Happens

If possible, provide:

• Brand

• Model

• When the machine overflows

• Whether it continues filling

• Whether it drains

• Whether the water level looks unusually high

• Whether there is excessive foam

• Whether the problem is constant or intermittent

• When the problem started

You don't need to know which component is faulty.

2. We Assess the Relevant Systems

Depending on the symptoms and equipment, diagnosis may involve checking relevant:

• Water-level systems

• Pressure systems

• Inlet valves

• Filling components

• Drain pumps

• Drain valves

• Filters

• Drain hoses

• Waste connections

• Chemical conditions

• Wiring

• Controls

• Related components

3. We Identify Why the Water Level Is Abnormal

The objective isn't simply to stop water reaching the floor.

It's to determine why it got there.

4. We Explain What We've Found

Once the fault is identified, we'll explain what requires attention.

5. We Repair What's Required

Where a repair is required, we address the relevant fault rather than replacing parts based solely on the visible symptom.

We Find the Fault Before We Sell the Fix.

Why Correct Diagnosis Can Save You Money

Imagine a glasswasher keeps overflowing.

Someone assumes:

"The water-level switch must be faulty."

A new switch is fitted.

But the machine overflows again.

Why?

Because the actual problem was elsewhere in the water-level, filling or drainage system.

Replacing parts through trial and error can increase repair costs without solving the original problem.

Our approach is different:

Diagnose First. Replace Second.

Commercial Glasswasher Brands We Repair

Worldwide CDM diagnoses and repairs faults across many commercial glasswasher brands used throughout Sydney hospitality venues, including:

• Lamber

• Eswood

• Washtech

• Sammic

• Norris

• Adler

• Aristarco

• Baron

• Jemi

• Smartwash

Contact us with your glasswasher brand, model and a description of where the water is appearing.

Commercial Glasswasher Overflow Repairs Across Sydney

Worldwide CDM provides commercial glasswasher fault diagnosis, servicing and repairs for:

• Restaurants

• Bars

• Pubs

• Clubs

• Hotels

• Cafés

• Function centres

• Catering businesses

• Commercial kitchens

• Hospitality venues

We service commercial customers throughout Sydney and surrounding service areas.

More Than 30 Years of Commercial Equipment Experience

An overflowing glasswasher can quickly turn from an equipment problem into an operational problem.

Your staff shouldn't spend service repeatedly mopping water from around the machine and hoping the next cycle works.

Worldwide CDM is a family-run commercial catering equipment business with more than 30 years of experience supporting Sydney hospitality businesses.

Our approach is straightforward:

Understand what's happening.

Assess the relevant systems.

Identify the cause.

Explain the problem.

Repair what's required.

We Find the Fault Before We Sell the Fix.

Related Commercial Glasswasher Problems

An overflowing glasswasher can share symptoms with several other faults.

Commercial Glasswasher Leaking Water

Water level appears normal, but water is escaping from the machine?

Troubleshoot Commercial Glasswasher Leaking Water →

Commercial Glasswasher Not Draining

Water is remaining inside the machine after the cycle?

Troubleshoot Commercial Glasswasher Not Draining →

Commercial Glasswasher Not Filling With Water

Machine won't fill, fills slowly or has inconsistent water levels?

Troubleshoot Commercial Glasswasher Not Filling →

Commercial Glasswasher Chemical Dosing Problems

Excessive foam or unusual detergent/rinse-aid behaviour?

Troubleshoot Commercial Glasswasher Chemical Dosing Problems →