Had them out to fix my ac which was blowing hot air and they recommended that the unit needed 3lb of coolant and the coils needed cleaning. Spent 10min in unit didn't clean the coils, they were untouched. Explained that the ac was still blowing hot air, they came out again and tech said nothing they could do the unit needed to be replaced. Got a second opinion and had another company come out, they found the unit was overcharged in coolant, he had to release 3lb of coolant. Apparently crooked ac companies do this to burn out the unit. Paid them to basically sabotage my ac unit.