DeRoyal JetStream
DeRoyal · Model JetStream
Patented Automatic Temperature Control (ATC™) measures and regulates temperature to provide therapeutic hot or cold therapy without manual adjustment. Intuitive LED light lets user know when the unit is in therapeutic zone and advises when to add ice or hot water. Portable system suitable for any medical setting or treatment at home. Lightweight, low profile design and Quick Start Guide are patient friendly. Unit provides hot and cold therapy.
Typical Failure Modes
Compiled for this model from its own documentation and established engineering knowledge for this equipment class - not from a verified service record. Confirm against the manufacturer's service manual.
Water not reaching set temperature (ATC fault)
HighSymptoms: Therapy water stays too warm or too cold, LED never enters the therapeutic zone, prompts to add ice/hot water constantly.
Root cause: Failed heater or thermoelectric element, a drifting temperature sensor, or an ATC control-board fault.
No or weak circulation to the pad
HighSymptoms: Pad stays cold/warm unevenly, low flow, pump noisy.
Root cause: Worn circulation pump, air lock, low reservoir level, or a kinked/occluded hose set.
Reservoir / hose-set leak
MediumSymptoms: Water pooling under the unit, dropping reservoir level, damp connections.
Root cause: Cracked reservoir, worn quick-connect seals, or a punctured pad/hose.
LED indicator / user-interface fault
LowSymptoms: Zone LED wrong or dark, unit will not power on, controls unresponsive.
Root cause: Failed indicator, keypad, or power supply.
Serviceable Parts & Consumables
Serviceable items for this model, compiled from its documentation and engineering knowledge for this equipment class. Service class and relative cost are estimates, not manufacturer figures; no part numbers are given. Confirm intervals and pricing against the manufacturer.
Circulation pump
Class Periodic replacementRel. cost $$$R&R Difficult
Heater / thermoelectric element
Class Major service partRel. cost $$$R&R Difficult
Temperature sensor / thermistor
Class Periodic replacementRel. cost $R&R Moderate
Reservoir and quick-connect seal kit
Class Periodic replacementRel. cost $$R&R Fairly easy
Hose set / therapy pad
Pads are often single-patient; hoses wear at the connectors.
Class Frequent wear itemRel. cost $R&R Easy
| Part | Service class | Relative cost | R&R difficulty |
|---|---|---|---|
| Circulation pump | Periodic replacement | $$$ | Difficult |
| Heater / thermoelectric element | Major service part | $$$ | Difficult |
| Temperature sensor / thermistor | Periodic replacement | $ | Moderate |
| Reservoir and quick-connect seal kit | Periodic replacement | $$ | Fairly easy |
| Hose set / therapy pad Pads are often single-patient; hoses wear at the connectors. | Frequent wear item | $ | Easy |
Relative cost: $ lowest · $$$$ highest service-part cost for this equipment class. Not a price.
Troubleshooting Approach
A starting sequence for this model, compiled from its documentation and engineering knowledge for this equipment class. Follow the manufacturer's service documentation for the actual procedure.
Symptom: Water will not hold therapeutic temperature
- Fill the reservoir to the correct level and let the unit run to stabilise.
- Measure the delivered water temperature with a reference thermometer and compare to the set point.
- If it never heats/cools, isolate heater/TEC element vs sensor vs control board with resistance checks.
- Replace the failed element or sensor.
- Confirm the ATC brings the water into the therapeutic zone and the LED tracks it.
Symptom: Pad not warming/cooling - poor circulation
- Check reservoir level and top up; bleed any air lock.
- Inspect the hose set and pad for kinks, clamps, or leaks and replace if damaged.
- Listen to the pump - cavitation or no flow points to the pump or an air lock.
- Feel both hoses for flow and temperature difference.
- Replace the circulation pump if it will not move water under load.