The high pressure cutout switch is located on the receiver/dryer. If compressor clutch sctivated - then it's good
HCPO switch opens at 360 psig (2482 kPa) and closes at 240 psig (1655 kPa)
1. Check the refrigeration system for high discharge pressure and correct as needed.
2. Check the High Pressure Cutout switch for proper operation (closed under normal conditions). If it's bad then compressor won't start. Check the switch for excessive reistance. The nominal switch resistance is less than 1 ohm.
3. Check the High Pressure Cutout switch circuit as shown by Service Procedure D01A.
4. Check condenser fan and make sure it's spinning (System Monitoring tab on software will show its active), if the fan is not engaging - check 12V coming to it. If no voltage coming - check 7CF fuse on the motherboard under the bunk.