I am a skilled professional that works for a Dor-Mar Heating & Air Conditioning company. I received a call from a customer who was experiencing cooling issues with their A/C unit. Upon inspection, I found that the compressor was not working properly and needed to be replaced. I ordered the necessary parts and replaced the compressor. After the replacement, the customer's A/C unit was working properly again. I collected payment from the customer and informed them that the warranty would cover the replacement.