PC 0L error code

What triggers it

Low ambient temperature protection triggers when T4 is below the manual's compressor-on or compressor-off low-temperature thresholds for 10 seconds.

What to do

MRCOOL's service manual does not publish an ordered step-by-step procedure for this protection condition.

Whether it self-clears

The manual exits the protection when T4 is no lower than -25.6F (-32C) for 10 seconds.

Which systems show it

• MRCOOL DIY 5th Generation single-zone 9k, 12k, 18k, 24k, and 36k D25 indoor/outdoor models listed in manual section 1.1.

Related codes

Technician scope

N/A (operating limit)

Source

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