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Compressor indicator (red) lights on constantly, indoor fan stops

Red Compressor indicator solid, indoor fan stops — Unit is defrosting

York · Air Conditioning

What does Compressor indicator (red) lights on constantly, indoor fan stops mean?

During heating operation, if the red compressor indicator lights up constantly and the indoor fan stops, the unit is automatically shifting into defrost mode to maintain efficiency. This is a normal operation, not a malfunction.

Common Causes

  • Normal automatic defrost cycle during heating operation
  • Buildup of ice on the outdoor unit heat exchanger

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Understand this is a normal defrosting process for efficient heating.

  2. 2

    Wait patiently; the indicator will turn off and the unit will return to heating mode within ten minutes.

  3. 3

    Do not try to force the unit out of defrost mode, as this is an automated safety and efficiency feature.

Browse all codes in this manual (26)
Verified technical data. Last updated: April 2026

Related Faults

Abnormal heat in power supply cord and power plugAbnormal heat in power supply cord or plugAccidental pour of impurities or water into machine or remote controlLiquid or foreign objects inside the unit or remoteAir conditioner can not operate at allAir conditioner will not operate at all
Source: York Air Conditioning
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