Called Extreme Air Systems when my A/C wasnt working and the previous company I called told me i needed a new compressor. the technician was polite, friendly and came over very quickly. He told had my air conditioning working within five minutes and told me my thermostat wire was cracked and have came off the furnace board. while he was there he performed a through cleaning and service of my furnace and a/c. Very satisfied and will be using them for seasonal maintenance.