Preston Richard conducted a thorough evaluation of the Trion Mini-Mister and concluded that it should be replaced. That conclusion was agreed to by the company. I appreciate the warranty service.
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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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Service technician called out to service a gas furnace in Hartford OH
I successfully completed a repair job under a warranty claim. The issue involved a malfunctioning appliance, which I diagnosed and fixed efficiently. Despite the warranty company initially considering another service provider, I demonstrated my expertise and completed the task to their satisfaction. My thorough approach and attention to detail ensured the appliance was fully restored.
Recently, we completed a comprehensive HVAC service for a client. The job involved a thorough inspection of their heating and cooling systems, followed by the replacement of a faulty thermostat and the cleaning of air ducts. Additionally, we performed a system optimization to ensure efficient operation. The labor was meticulously executed, and all tasks were completed within the agreed timeframe. This project was approved by Jordan, and we are discounting Him the amount of the labor as a gesture of satisfaction with the service provided.
Upon arrival, I identified that the thermostat was not functioning properly, causing issues with the heating system. I began by turning off the power to the heating system to ensure safety during the replacement process. I then removed the old thermostat, carefully noting the wiring configuration for accurate reattachment. After installing the new thermostat, I reconnected the wires and secured the device to the wall. I powered the system back on and conducted a thorough test to confirm that the heating was functioning correctly. The new thermostat responded promptly to temperature adjustments, ensuring optimal heating performance. The job was completed efficiently, restoring reliable heating to the system.
Arrived at the site for a new heating and furnace service request. Upon inspection, I identified several issues with the system. I thoroughly explained the problems and presented multiple viable solutions to the customer. After discussing the options, we agreed on the best course of action. The replacement system is being installed today, ensuring the home will have reliable heating and furnace functionality soon.
Upon inspection, the filters were severely dirty and obstructed, hindering system performance. I removed the filters and thoroughly cleaned them. Next, I meticulously cleaned the spark ignitor to ensure proper ignition. I then adjusted the manual damper door to optimize airflow. Additionally, I cleaned the flame sensor to enhance its sensitivity and accuracy. After these adjustments, I verified that the systems were functioning correctly and the heating was restored.
I successfully installed a new blower motor on the customer's Coleman furnace. The process involved removing the old motor, ensuring all connections were secure, and testing the new motor to confirm proper operation. The customer expressed satisfaction with the work and requested to discuss the final payment with the manager before proceeding.
Service technician called out to service an electric furnace in Pataskala OH
Commercial service technician called out to service a rooftop furnace in New Lexington OH
Upon arrival, I replaced the two Sloan flush valves in the women’s restrooms. Each valve was carefully removed, and the new ones were installed with precision. To ensure the new fill valves functioned correctly, I tested each fixture thoroughly. Additionally, I drained down the system to replace the shut-off for the fill valves, ensuring all components were properly aligned and operational. The job was completed efficiently, with all fixtures tested for proper operation.
Upon inspection, the blower speed was found to be set lower than optimal, which could affect system efficiency. Additionally, there were noticeable leaks around the doors and windows due to the absence of caulking. To address these issues, I adjusted the blower speed to a more suitable level, enhancing the system's performance. The customer has requested a new seal around the door and caulking for the windows to prevent further leaks. The HVAC system itself is functioning correctly, and these adjustments and future sealing will help maintain optimal performance.
Service technician called out to service a gas furnace in Newark OH
Upon inspection, I identified loose syrup lines at the back of the unit, causing a leak. I meticulously resealed the affected lines, ensuring a secure and tight connection. The system was tested post-repair, confirming that the leak had ceased. The unit is now functioning properly, with no signs of leakage.
Upon arrival, I assessed the furnace and confirmed the need to replace the inducer motor. I sourced a compatible replacement part and proceeded to safely dismantle the necessary components. The old inducer motor was carefully removed, and the new one was installed with precision. After ensuring all connections were secure and the system was properly reassembled, I conducted a thorough test to verify the furnace's functionality. The system operated smoothly, and I provided the customer with a detailed explanation of the work performed and the importance of regular maintenance. Payment was collected upon completion.
