John Deere HTC fault codes / John Deere HTC diagnostic trouble codes

HTC Control Unit – The HTC (Electronic Heater Control Unit) is the controller for the heater (no air conditioning system).

John Deere fault codes / John Deere diagnostic trouble codes

ATC codes	BCU codes	BIF codes	DSM codes	DTI codes
ECU codes	EPC codes	ETC codes	HTC codes	JDL codes
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TEI codes	TSC codes	UIC codes	UIM codes	VTI codes