It's a shame we decided to use Highland Mechanical for service. I urge you to search elsewhere. We were charged $130 for them to drive out and turn the furnace off and on and say it was fine. The problem came back and we called them again and they recommended a cleaning and inspection, they said that they could tell that the transformer was the problem. They swapped that out and said that everything was fine and charged us $450. When we woke up to cold showers again, we scheduled them to come by again! They came back 2 more times and replaced the electrodes and oil pump and them saying that everything looks good, We paid them over $800 at this point. We woke up to cold showers again, we had them back to find the problem, they suggested the oil line, which they charged extra to inspect earlier. They were unwilling to offer us anything short of their full price and telling us they did their 'best', and we had the choice to follow their recommendations; we did not have them replace it.