00055
Carrier Transicold
Info

Check Defrost Air Switch

Failure detected in the air pressure switch that initiates or monitors defrost.

Possible causes

  • Clogged or dirty pressure intake tubes
  • Defective air switch
  • Ice blocking sensor ports
  • Switch electrical disconnection

Recommended actions

  • Clean air pressure sampling tubes
  • Verify switch continuity
  • Inspect hoses for air leaks
  • Perform manual defrost cycle to confirm

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