0Glastender Glasswasher Parts & Troubleshooting Guide
Glastender glasswasher parts should be identified by model, serial number, operating system, and OEM number—not by appearance alone. This guide explains the major service systems used in Glastender low-temperature and high-temperature glasswashers, the symptoms that help narrow a fault, and the evidence to collect before ordering a replacement part.
Glasswasher checks with a next decision
Operator checks below are external observations and manual-approved cleaning with the machine stopped and utilities isolated as the manual requires. Keep guards installed during operation. Technician checks include internal wiring, energized measurements, controls, pressurized plumbing and refrigerant service. Do not bypass interlocks, open live compartments or change protected settings to make the symptom disappear.
Not filling or filling slowly
Applies to: GT-18/GW24 low-temperature systems; GD24HT has a separate fill/heat sequence.
- Operator: verify the normal water shutoff position without disturbing connections. Record whether the machine is silent, the conveyor moves, or a fill/heating message appears. No fill with otherwise active operation directs attention toward supply/fill; no activity needs the start checks below.
- GT-18/GW24: if supply is available but the holding tank does not fill, stop and have service check restrictions and the inlet valve/control circuit. On GW24, use the manual’s FILL mark as the reference; do not adjust the board to hide a restriction.
- GD24HT: allow its documented startup fill/heating sequence to reach the ready state. Record an exact fault message or stalled stage for service; do not use GT-18/GW24 fill or temperature adjustments.
Service and ordering decision: A technician must distinguish absent water, restricted inlet and missing electrical command from a defective valve. After a confirmed valve fault, compare 01000561 inlet-valve listing with the installed OEM number and serial record. No GD24HT compatibility is asserted for this listing.
Will not start or has delayed startup
Applies to: GT-18, GW24 and GD24HT; model-specific interlocks and startup logic apply.
- Operator: note power/display state and confirm normal cover/door closure. A dark panel versus a lit but unresponsive panel gives service different evidence. Repeated tripping, burning odor or damaged wiring requires shutdown and service.
- GW24: check the chemical indications and containers as well as the sliding cover. Its manual lists empty chemicals as a no-run cause. Follow the documented refill/prime procedure; never defeat the chemical sensing system.
- GT-18/GW24: a startup delay can involve incoming water temperature. Record whether the cycle eventually starts. GD24HT: distinguish heating from ready state. If proper operator preparation does not restore operation, have service test the input, wiring and controls.
Service and ordering decision: For a confirmed GW24 panel fault, see 01001464 GW24 membrane touchpad. Match panel layout, ribbon connection and serial record. A no-start symptom alone does not justify a touchpad or control-board order.
Poor washing or weak circulation
Applies to: GT-18/GW24 spray-box systems; GD24HT wash/rinse-arm system.
- Stop and clean: use the model’s operator cleaning procedure to remove debris from removable screens and spray components. Reassemble correctly before operation. If performance returns, log the cleaning rather than buying a pump.
- GT-18/GW24: check spray-box seating and gasket condition, plus unobstructed rack/conveyor movement. The GT-18 troubleshooting chart includes a belt drive; GW24 identifies a drive coupling. Do not substitute one drive diagnosis for the other.
- GD24HT: check proper rack loading and clean, correctly installed arms/strainers. If poor results persist, have service and the chemical supplier assess water conditions, delivery and the wash system.
Service and ordering decision: Do not assume a running motor establishes adequate circulation. A technician should verify the actual failed assembly before selecting pump, motor or seal parts. No unverified pump listing is offered here; Request fitment help with the model, serial and pump markings.
Not draining or water remaining
Applies to: GT-18/GW24 drain-stopper/linkage systems versus GD24HT drain controls.
- Identify the stage: record when water remains and whether the normal drain command completes. Follow shutdown/cool-down instructions before touching removable screens; hot water and chemicals can remain in the machine.
- Operator: clean permitted removable strainers and inspect the visible drain route for an obvious kink or backed-up receiving drain. If nearby fixtures also back up, involve facility plumbing before replacing a machine part.
- Service: GT-18/GW24 inspection follows the stopper and linkage in their drawings. GD24HT uses its own shutdown/drain and troubleshooting sections. If the path is clear but the command fails, test the relevant mechanism, pump/valve and controls for that machine.
Service and ordering decision: Do not reach into moving linkage or open plumbing under pressure. Match drain type, OEM number, connection and serial application after the fault is established; a universal drain-pump recommendation is inappropriate.
Chemical delivery does not advance or hold
Applies to: GT-18/GW24 chemical sanitizing; GD24HT detergent/rinse-aid delivery is a different system.
- Operator: read container labels, check levels and visible pickup routing, and inspect accessible tubing without opening chemical connections. Do not identify chemicals solely by tube color or mix products.
- Observe during the manual-approved procedure: on GT-18/GW24, feed should advance and hold between pump strokes. Repeated fallback is evidence to report for tubing/pump-path inspection, not proof that the entire pump is bad.
- Escalate: if replacing an empty container and following the correct priming procedure does not restore delivery, have the chemical supplier/service technician inspect tubing integrity, pump tube and obstructions and verify results by the applicable test method.
Service and ordering decision: Do not return equipment to sanitizing service on the basis of appearance or smell. Follow the machine/chemical requirements. Request a verified tube/material and chemical-circuit match before ordering; do not substitute one tube into every machine.
| Model / scope | Manufacturer reference | Use it for / verified catalog connection |
|---|---|---|
| GT-18, +1, +1L, +1R, +2, +2-IC, +3; after August 2006 | GT-18 manual, rev. March 5, 2026 | Printed pp. 2–5: connections, operation and exploded view; p. 12: cleaning; p. 13: symptom chart. Earlier machines require their applicable manual. |
| GW24 | GW24 manual, rev. March 5, 2026 | Printed p. 3: component locations; p. 6: panel and cycle; pp. 8–9: cleaning; p. 13: troubleshooting. 01001464 GW24 membrane touchpad is identified by the manufacturer part record. |
| GD24HT | GD24HT installation, operation and service manual | Printed pp. 10–13: fill, ready state and shutdown; pp. 17–18: maintenance; pp. 21–25: faults and diagnosis; pp. 26–51: component diagrams. Use its own part numbers, not GW24 substitutions. |
| Water-inlet valve identification | Glastender 01000561 part record | 01000561 water inlet solenoid valve. Manufacturer identifies a glasswasher inlet-valve assembly; this record alone does not verify every model/serial application. Match the installed valve and serial lookup before ordering. |
Glastender glasswasher model families
Glastender’s current glasswasher documentation separates low-temperature chemical-sanitizing equipment from high-temperature sanitizing equipment. The low-temperature family includes GT-18 stations and the GW24 rotary glasswasher. The GD24HT is a high-temperature underbar glasswasher with a built-in booster, pumped drain, controls, and temperature-dependent sanitizing systems. Use the equipment data plate and current manual to determine which system you are servicing.
| Equipment family | Service clues | Parts commonly investigated |
|---|---|---|
| GT-18 series | Rotary-rack low-temperature platform with several station configurations | Pumps, chemical tubing, valves, switches, drain linkage, wash components, and controls |
| GW24 | 24-inch rotary low-temperature chemical-sanitizing glasswasher | Chemical pumps, valves, conveyor or drive components, switches, drain parts, and controls |
| GD24HT | High-temperature underbar machine with booster and pumped drain | Heating and temperature components, pumps, solenoid valves, controls, pressure-related parts, and drain components |
Find parts by glasswasher system
Fill and water-control system
Slow fill, no fill, overfilling, water hammer, or inconsistent cycle volume can point toward the incoming water supply, strainer, valve, pressure regulation, level sensing, or related wiring. Verify facility water conditions before condemning an internal component. A valve with the correct voltage but the wrong connection, flow direction, or model application is not a safe substitute.
Wash and circulation system
Poor washing can result from blocked spray openings, incorrect chemical delivery, low water volume, worn pump components, a motor fault, or debris in the wash system. Inspect removable and cleanable items first. If a pump or motor is suspected, record its OEM number, electrical rating, mounting pattern, and connections.
Chemical delivery system
Low-temperature glasswashers depend on correctly operating chemical pumps, pickup tubing, and priming controls. Brittle or flattened tubing, air leaks, empty containers, and incorrectly routed lines can mimic a failed pump. Never mix tubing sizes or materials without model-specific documentation.
- Record the pump label, OEM number, voltage, and the chemical circuit it serves.
- Measure tubing inside and outside diameter and document its routing before removal.
- Photograph pickup fittings, pump-head connections, check valves, and line colors without assuming color alone identifies the chemical.
- Confirm tubing material and chemical compatibility in the exact model documentation.
Drain system
Water remaining after a cycle can involve a blocked drain path, drain linkage, pump, hose installation, control command, or facility drain condition. Determine whether the machine uses gravity drainage, mechanical linkage, or a pumped drain before selecting parts.
Controls, switches, and interlocks
A machine that will not start, stops mid-cycle, or repeats a cycle may have an open interlock, switch problem, control fault, loose connection, or another system condition preventing operation. Document the precise sequence of events instead of replacing the first electrical component that appears related.
Symptom-to-system troubleshooting map
| Observed symptom | Inspect first | Information to record |
|---|---|---|
| No fill or slow fill | Water supply, shutoff, screen or strainer, valve command, pressure condition | Model, serial, supply condition, valve number, voltage |
| Poor wash results | Spray path, water level, chemical feed, wash pump, rack movement | Cycle stage, noise, pump markings, visible blockage |
| Does not drain | Drain obstruction, hose routing, linkage or drain pump, control command | Drain type, hose height, OEM number, remaining water level |
| Will not start | Power, door or cover interlock, start switch, controls, wiring | Display state, switch markings, model and serial |
| Temperature or sanitizing concern | Incoming conditions, heater or booster system, sensor, control, chemical delivery | Machine family, displayed readings, manual requirements |
Before ordering a Glastender glasswasher part
- Photograph the complete data plate and record the full model and serial number.
- Capture the OEM number and every electrical or flow marking on the original component.
- Compare voltage, connection size, hose or tube size, mounting pattern, and orientation.
- Use the current model manual or parts documentation to confirm the assembly and serial range.
- Inspect surrounding wiring, tubing, connectors, seals, and restrictions so a secondary problem is not missed.
Shop available Glastender parts, use the Glastender parts lookup guide, or return to the Glastender Parts Resource Center. Current active inventory includes the Glastender 01000550 pressure switch; verify exact application before ordering.
For manufacturer documentation, consult Glastender’s official manuals library and serial-number part finder.
Common glasswasher ordering mistakes
- Confusing low-temperature chemical-sanitizing components with GD24HT high-temperature components.
- Choosing a pump or valve without matching voltage, connections, flow direction, and serial range.
- Replacing a chemical pump before checking empty containers, air leaks, tubing condition, routing, and priming.
- Ordering a drain part before identifying whether the machine uses gravity, linkage, or a pumped drain.
Glastender glasswasher parts FAQ
Which Glastender glasswasher model do I have?
Use the model and serial data plate before selecting parts. Glastender currently documents low-temperature GT-18 and GW24 families and the high-temperature GD24HT family; their wash, sanitizing, drain, and control systems are not interchangeable by appearance alone.
Can I order a glasswasher part from a photo?
A photo is useful for confirming shape and connections, but the strongest match includes the Glastender OEM number, model, serial number, voltage, dimensions, and the markings on the installed component.
Why is my Glastender glasswasher not completing a cycle?
Possible causes include an interlock or switch condition, a control problem, inadequate fill or drain performance, a pump issue, or a wiring fault. Record the exact cycle stage and any display message before testing components.
Are GT-18, GW24, and GD24HT parts interchangeable?
Do not assume interchangeability. These model families use different operating designs and sanitizing methods. Confirm every replacement against manufacturer documentation for the exact model and serial range.
Should a technician install electrical or pump parts?
Yes. Commercial glasswashers combine electricity, water, chemicals, heat, and moving components. Disconnect utilities and use a qualified commercial-equipment technician for electrical, pump, control, or internal plumbing service.
Technical scope reviewed against current manufacturer product categories and manuals on 2026-09-15. Always follow the manual and safety requirements for the exact model being serviced.
Resource update: September 22, 2026. Manufacturer references identify the scope of technical details; diagnostic sequences are editorial guidance and do not represent a completed repair or individual technician review.