Got here so quickly on a very busy week. Worked with me to make sure they had the part and quickly got my heater running before an anticipated -9 degree night. Will be my first call next service I need.
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Very helpful and patient with all of our questions. Very knowledgeable!!
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I was highly impressed either way Steve’s work. New install yesterday, but furnace shut off that same evening . Steve came today to check out the issue, and after some problem solving, he figured out it was a ground wire issue. He got it all fixed up and furnace is running again!
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Preston diagnosed our problem with our furnace and fixed it quickly! Preston was super friendly and very knowledgeable! I appreciate how thorough he was, thank you!
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Derrick came out late on a very cold night in 2026 in January. He identified the problem quickly and as promised, DOR MAR sent someone (him) back the next day. His troubleshooting was spot on and the replacement part fixed the issue. Thank-you to DOR MAR for honoring the labor and parts warranty and to Derrick for the speedy service.
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Steve had already deduced the issue in his mind before we got to the furnace. We’d be happy to have him back anytime. Bruce Beacom
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Great work! Had a super old furnace that broke, of course during the coldest weather. Ben was able to remove it and install the new one in no time. Kept me in the loop about everything, and house went from 40 degrees to 65 super quickly! So grateful he was so knowledgeable and efficient. Couldn’t have asked for a better tech!
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I had a great experience with Derrick from Dor-Mar Heating and Cooling. He was honest, professional, and did an excellent job getting my furnace back up and running. Derrick was very informative, took the time to explain what was going on, and was not pushy at all, which I really appreciated. It’s refreshing to work with a technician who’s knowledgeable and straightforward. Highly recommend Derrick and Dor-Mar Heating and Cooling!
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Calob, knowledgeable, efficient and very professional, would welcome him back any time. All the Best, Bruce Beacom
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We successfully installed a high-efficiency, two-stage variable speed gas furnace, ensuring optimal performance and energy savings. The installation included a whole house humidifier for added comfort. Our team handled all parts and labor, providing a comprehensive service. The system comes with a 10-year warranty on the furnace and a 1 year labor warranty. Additionally, we included an LP kit for flexible fuel options.
We recently completed a comprehensive installation and maintenance task involving a humidifier system and furnace exhaust. Our team of skilled installers meticulously replaced the existing vinyl tubing for the humidifier to ensure optimal performance and efficiency. Additionally, we thoroughly inspected and rerouted the furnace exhaust system, addressing any potential issues to enhance safety and functionality. Our technicians paid close attention to detail, ensuring all connections were secure and that the systems operated seamlessly. This project required precision and expertise, which our team delivered to meet the highest standards.
During the furnace check, I thoroughly examined the modular furnace and its components. I discovered that the blower motor was running continuously. After inspecting the thermostat settings, I found that they were configured to keep the system running at a low speed constantly. I explained these settings to the client, detailing how the system is designed to operate in this manner. The client was very receptive to the information and expressed gratitude for the clear explanation. The system appeared to be functioning well, and there were no concerns raised about its appearance or performance. The client appreciated the detailed insight into the system's operation.
I returned to replace the blower motor and thermal fuse for the air handler as requested. Both parts were covered under warranty. After replacing the faulty components, I conducted a thorough inspection to ensure everything was functioning correctly. The heat strips and blower were tested and confirmed to be operational. No additional issues were identified during this service. The system is now performing as expected.
Upon inspection, the air conditioning filter was entirely obstructed, causing the unit to overheat. I promptly removed the old filter and replaced it with a new one. The system was then tested to ensure it was functioning correctly. The air flow has been restored, and the unit is now operating efficiently. The customer is satisfied with the improved performance.
Upon arrival, I assessed the home's temperature at 72°, which the client had been working to achieve all day. We discussed the system, which included a dual fuel setup with propane, a furnace, and a heat pump. The system was set to heat mode. Switching to emergency heat significantly increased the air temperature. The client had never used this setting before, as they had never experienced an emergency. After switching to emergency heat, the temperature rose by another 3°. The client adjusted the thermostat to 70°F and decided to keep the system on emergency heat until outdoor temperatures improve.
I utilized a high-efficiency heater for over an hour in an attempt to unthaw the frozen pipes. Despite the prolonged use, the pipes remained frozen. I will return on Monday to replace the affected pipes. In the meantime, I will continue to employ various methods to attempt to unthaw the pipes. This includes monitoring the temperature and ensuring the heater is functioning optimally. My goal is to resolve the issue as efficiently as possible.
I arrived at the site and assessed the gas valve issue. After confirming the problem, I ordered the appropriate replacement part and prepared for the repair. I carefully disassembled the existing gas valve, ensuring all connections were safely disconnected. The old valve was removed, and the new one was installed with precision. I double-checked all connections for leaks and ensured everything was securely fastened. Once the new valve was in place, I tested the unit to confirm it was functioning correctly. The customer was informed about the successful repair, and the unit is now operating smoothly.
Service technician called out to maintenance a hot water tank in Zanesville OH
Upon inspection, the gas valve was found to be faulty, posing a safety risk. I promptly diagnosed the issue and confirmed the need for replacement. The new gas valve parts are available for next-day installation. This replacement ensures the system operates safely and efficiently. If you approve the estimate, we can schedule the installation promptly. This proactive measure will safeguard your system and maintain optimal performance.
Service technician called out to service a leaking de humidifier in Granville OH
This is an estimate for replacing the heat exchanger assembly. Upon inspection, it was determined that the current heat exchanger was malfunctioning, leading to inefficient heating. The replacement involves removing the old heat exchanger, installing the new one, and ensuring all connections are secure and safe. This process requires specialized tools and knowledge to ensure proper installation. The new part is in stock and ready for immediate installation. This estimate includes both labor and materials. If you approve, we will schedule the replacement for tomorrow. Thank you.
Upon inspection, I identified two severely damaged PVC hangers that were compromising the structural integrity of the system. I carefully removed the old hangers, ensuring minimal disruption to the surrounding components. I then installed two new, high-quality PVC hangers, securely fastening them to the designated points. This replacement not only restored the system's stability but also ensured compliance with safety standards. The job was completed efficiently, with attention to detail and precision.
