We had a problem with our heating system the day before and called our regular service tech. He was out of town but recommended this company. We called the next day and their service tech came out but could not find a problem. Actually, the furnace started working fine the night before. Service tech tested the unit, cleaned the sensor and igniter but could not find a problem. We were only charged a small service fee for coming out. Service tech was friendly. I would recommend this company, as I feel they were honest and fair.