Expert Oil Furnace and Boiler Repairs - Ready to Help When You Need it Most Your oil furnace or boiler conking out was just about the last thing you wanted to have happen this week. But look on the bright side – D & K Heating Service Experts Heating & Air Conditioning technicians in Belleville are just down the road, and we’re here for you all day, every day, all year round. What’s more convenient than that? Oil and boiler repairs slightly differ from electric or gas furnace repairs because their problems aren’t typically mechanical. We’ll ask – and test – many questions before determining and solving the problem. With oil furnace repairs, we check to see if the unit is firing first. Next, we move on to checking the oil itself. Since boiler heating uses water, we’ll see if the complication is water-based or machine-based and proceed from there. D & K Heating Service Experts in Belleville can fix all boiler and furnace repair needs. Plus, we have live customer support 24/7/365, so one of our experts will be able to come out to help you ASAP after we process your call. Our technicians are even NATE-certified, so they’ve been through the most rigorous and prestigious HVAC training in the industry. D & K Heating Service Experts also offers a 100% Satisfaction Guarantee* to all our customers in the Belleville area, so you can stay worry-free knowing you’re receiving only the highest quality service. In Belleville and need a furnace repair quick? Call 613-707-2421 to make an appointment. Have a little more time? Schedule an appointment online.