This guy Is nice but old and works very slow... he Milks it for evey dime he can, he came to my house to fix my air and said that he would only need 15 mins to know the problem then he would fix it, and when he gets to my house he starts cleaning the air unit and when i ask him the problem with it he say "One thing at a time" despite not having his own stuff to clean the unit having to use my rags, bucket and brushes and leaving repeadily for his own personal buisness he was working at my house for a day and a half dilly dallying around, talking alot... so he cleanned it of inside the unit replaced the thermistat on the wall and charged $600 and something... I asked him if it didnt work if he would come back out and take care of it he said YES... so low and behold it still didnt work, I called him with in 24 hours of him leaving my house and asked him to come back out and he said he would, but he DiD NOT SHOW OR CALL!!! He Left me wondering what happen why he didnt show with my kids in a house that said 97 dagreese on the thermistat and eventualy when he was able to be contacted... he said he had no clue to the problem and would not RE-TURN to my house.. So there had to be anothe 600 hundred for another Air company that came out and fixed it, 2 days later they and were in and out and replaced what had to be done to make it Work just fine... so after all that I went to the Bank and put a stop Payment on $100 of the 6 Hundred that got paid to Callahan, So defantly took advantag