Blue Star E4 Error Code
Discharge Temp-High Error.
ac · BO-5CNHW12QATU/QATX, BO-5CNHW18QATU/QATX
Discharge Temp-High Error
Cause: Compressor discharge temperature exceeded limit
How to fix: Check refrigerant charge level and outdoor unit airflow/condenser cleanliness.
Blue Star boards that may fix E4
If the board is the cause, these refurbished Blue Star boards are in stock. Match the part number before you order.
Bluestar F35BS 1 Ton Outdoor PCB
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Bluestar Godrej GRJ554-A V1 2013
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Bluestar Godrej GRJ519-A3 V1 Non Inverter PCB
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