It was a pleasure to have Darren fix my 14+ year-old Carrier central air unit. I came by the TH Oliver office a little after 8 a.m. and the friendly lady told me Darren would come by that very same morning. He arrived, did a perfect job and was gone before 11 a.m. Amazing. Replaced blown capacitor, cleaned and flushed unit, recharged coolant. Very proficient and extremely polite, a really nice guy. Highly recommended.