500
Thermo King
Warning

Check Host Evaporator Blower Low Speed

Problem detected in the low speed of the main evaporator blower.

Possible causes

  • Defective low speed relay
  • Blower motor with damaged windings
  • Blown speed-drop resistor

Recommended actions

  • Verify low speed relay operation
  • Measure motor amperage at low speed
  • Inspect speed resistor block

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