Here are some potential causes of why your AC may not be working in your 2005 Peterbilt truck:
Low refrigerant level: If the refrigerant level is too low, the AC system may not be able to generate cold air.
Faulty compressor: The compressor is responsible for compressing the refrigerant and circulating it through the system. If the compressor fails, the AC will not work.
Malfunctioning condenser: The condenser is responsible for releasing heat from the refrigerant. If the condenser is damaged or clogged, the AC will not be able to cool the air properly.
Broken expansion valve: The expansion valve controls the flow of refrigerant into the evaporator. If the expansion valve is faulty, the AC will not be able to cool the air properly.
Electrical issues: Electrical problems, such as a faulty AC relay or wiring issues, can also prevent the AC from working.
