In this video Iain goes over how he diagnoses and repairs a portable air conditioner that no longer cools due to low refrigerant charge. This video goes over how to reclaim the refrigerant, braze on a service valve, find the leak, and finally recharge the system.

Note: working on a portable air conditioner requires an EPA type 1 certification. Type 1 exams can be taken online or at a local trade school for a low cost.