New Holland T8010 Manual page 997

Cause:
Wire harness/connector failure
NOTE: If system is properly charged, then the low pressure switch will be closed and the short could be on either
leg of the switch.
ATC module failure
Possible failure modes:
Compressor clutch disabled.
Solution:
1) Inspect harness and connectors for possible shorting between low pressure switch wires (both leads) and other
wires. If a short exists, then replace harness.
2) If no fault found with wire harness or connectors, then replace ATC module.
Cause:
Incorrect charge in system
Wire harness/connector failure
NOTE: If system is properly charged, then the low pressure switch will be closed and the failure could be on either
leg of the switch.
Low pressure switch failure
ATC module failure
Possible failure modes:
Compressor clutch locked out until unit is cycled off then back on.
Solution:
1) Verify that system charge is within specification.
2) Disconnect low pressure switch from harness and check its resistance. It should be closed (measure around 0
Ohms) if system charged correctly. Replace if faulty.
3) Inspect harness and connectors for possible shorting between low pressure switch wires (both leads) and other
wires or possible open condition. If a short or open exists, then replace harness.
4) If no fault found with system charge, wire harness, connectors, or low pressure switch, then replace ATC module.
Section 50 - Climate Control - Chapter 1
ATC Fault Code 133
Low pressure switch (-) shorted to ground
ATC Fault Code 134
Low pressure switch open for more than 1 minute
50-1-26