conditioner went out two days ago. it was horrible. reporter: fortunately for donna, it was an easy repair. he always finds it fast too. reporter: during the summer months, robert normally gets about six calls per day during the week. you talking about 104 degrees and you don t have no air conditioning? i couldn t stay in that house neither. reporter: and about 10 per day on the weekend. i m going to check your air conditioner. can i come in. sure. they don t really care. if you introduce yourself as the air conditioning man, come on in, fix this for me please. reporter: sometimes it s a quick fix. other times, it s more complicated. we probably have bad capacitorors, censor motors, relays, blower motor inside could be going bad or a compressor burn out or lock up. i don t understand any of this stuff. a bad control roll-out switch. reporter: customers could care less about what s wrong. they just want to be cool. i don t only do it for the money.