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Troubleshooting code

Back to all WHK102A(3,4,W)**0***2 error codes

Trane WHK102A(3,4,W)**0***2 Cool + Service troubleshooting

Static pressure transducer diagnostic. Use this page to document the issue and prepare for service. GreenFlow should handle diagnosis for electrical, refrigerant, lockout, or recurring conditions.

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What the code means

Cool + Service: Static pressure transducer diagnostic

The Trane ReliaTel fail-code article identifies cool plus service as a static pressure transducer output failure or negative supply-air-pressure reading on configured units.

System area
ReliaTel VAV/static pressure controls
Service level
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Safe checks before calling

  • Confirm the thermostat is on, set correctly, and calling for heating or cooling.
  • Check the air filter and visible return-air path for obvious airflow restrictions.
  • Look around the outdoor unit for leaves, snow, ice, or other visible obstructions without opening the cabinet.
  • Take photos of the thermostat, outdoor unit, nameplate, and any visible flash pattern before scheduling service.

When to stop and call GreenFlow

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.

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Cool + Service questions

What does Cool + Service mean on a Trane WHK102A(3,4,W)**0***2?

The Trane ReliaTel fail-code article identifies cool plus service as a static pressure transducer output failure or negative supply-air-pressure reading on configured units.

What Trane message is associated with Cool + Service?

The Trane source used for this page associates Cool + Service with "Static pressure transducer diagnostic". Match the visible display text, LED pattern, or alert wording to the exact code whenever possible.

What system area does Cool + Service point to?

This code is grouped under reliatel vav/static pressure controls in the source-backed Trane troubleshooting data.

Which Trane documentation supports this Cool + Service page?

Source-backed Trane Commercial HVAC Help Center light-commercial LED code article for ReliaTel/RTRM and related rooftop control diagnostics.

Is Cool + Service related to a pressure safety condition?

The Trane source row places this code in a pressure-related system area: ReliaTel VAV/static pressure controls. Do not treat a pressure-safety code as a thermostat-only issue.

What information should be captured for Cool + Service before clearing alerts?

Capture the exact code, any displayed alert text, the model and serial number, thermostat or control status, operating mode, symptoms, and photos of the display or LED pattern before the alert history is cleared.

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