Q: How can I ensure effective operation and performance of the AC?
A: The following steps are highly recommended to ensure effective operation and performance:
1. Check operation of engine-driven fan clutch or electric radiator and condenser fan motor.
2. Check operation of clutch cycling switch or relay and all safety switches.
3. Check for proper operation of cooling system.
4. Check the external condition of the condenser (bent fins, road debris and leaks).
5. Check all drive belts and pulleys for alignment and wear.
6. Inspect Schrader valves and sealing caps. If retrofitting, install proper retrofit fittings.
7. Inspect all hoses and fittings for leaks and repair as necessary.
8. Evacuate system to 29.5 in. HG for 2-4 hours. The system must hold the vacuum before charging.
9. After charging the system, leak test and performance test the system.
10. It is always good to add the proper dye to the system incase you system develops a leak.
11. Check for proper operation of you heater control valve. A faulty valve will allow heat into you cab and will not let the evaporator work properly.
12. Check for proper operation of your fan clutch. If the fan clutch is not working properly your system will not cool down and thus your head pressure will be too high. This will cause the system not to work correctly and premature death of your compressor.