Troubleshooting code
Back to all DHJ240A(3,4,W)*(0,A)(L,M,H)***4 error codes
Cooling circuit or pressure diagnostic. Use this page to document the issue and prepare for service. GreenFlow should handle diagnosis for electrical, refrigerant, lockout, or recurring conditions.
What the code means
The Trane ReliaTel fail-code article identifies cooling output pulsing with high or low pressure switch trips or compressor/cooling-circuit conditions depending on unit configuration.
Call GreenFlow if the code repeats, the system is locked out, heating or cooling is not restored, there is ice buildup, electrical odor, unusual noise, or any issue involving pressure switches, sensors, wiring, refrigerant, reversing-valve operation, or warranty coverage.
Share the visible code, model and serial number if available, photos, current symptoms, and whether the issue affects heating, cooling, or both.
The Trane ReliaTel fail-code article identifies cooling output pulsing with high or low pressure switch trips or compressor/cooling-circuit conditions depending on unit configuration.
Check thermostat status, filter condition, visible outdoor-unit obstructions, and take photos of the flash pattern and nameplate. Do not open electrical panels or refrigerant-side components.
Call GreenFlow if the code repeats, the system is locked out, heating or cooling is not restored, there is ice buildup, electrical odor, unusual noise, or any issue involving pressure switches, sensors, wiring, refrigerant, reversing-valve operation, or warranty coverage.
GreenFlow can review the code, photos, equipment access, and symptoms before scheduling the right next step.
Popular cities
Try another nearby city or contact GreenFlow to confirm service availability.
They showed up within an hour of me making the call on a Sunday. They fixed our system and taught us how to replace the fuse in the future. We would definitely call again.
Just had a service call because my tankless water heater stopped working with E110 code. Andrey located the root cause real quick and fixed the issue within half an hour, also gave reasonable recommendations for further maintenance.
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The repair person came quickly and was super efficient and polite, and showed me what to do next time. He gave my dog a quick pay and was off again.
