Furnace Maintenance & Tune-Ups

Why Regular Furnace Maintenance is Essential

Your furnace works hard to keep your home warm during the winter. Without regular maintenance, it can lose efficiency, break down unexpectedly, or even become a safety hazard. At Dor-Mar, we provide expert furnace maintenance and tune-up services to keep your heating system running at peak performance all season long.

Benefits of Annual Furnace Tune-Ups

1. Improved Energy Efficiency

A well-maintained furnace operates more efficiently, reducing energy consumption and lowering your heating bills.

2. Prevents Costly Repairs

Routine maintenance helps catch minor issues before they turn into major, expensive repairs.

3. Extends Furnace Lifespan

Regular servicing ensures your furnace lasts as long as possible, delaying the need for a costly replacement.

4. Enhances Indoor Air Quality

A clean and properly functioning furnace filters out dust, allergens, and other airborne contaminants, keeping your home’s air fresh and healthy.

5. Ensures Safety

A neglected furnace can develop dangerous problems like gas leaks or carbon monoxide emissions. Routine inspections help identify and resolve safety concerns before they become serious.

What’s Included in a Furnace Tune-Up?

At Dor-Mar, our furnace maintenance service includes a comprehensive multi-point inspection and tune-up to ensure your system is operating safely and efficiently.

1. Full System Inspection

  • Check for wear and tear on internal components
  • Inspect the heat exchanger for potentially dangerous cracks or leaks
  • Examine electrical connections for safety

2. Cleaning and Lubrication

  • Clean or replace the air filter
  • Remove dust and debris from furnace components
  • Lubricate moving parts to prevent wear

3. Performance Testing

  • Test the thermostat for accurate temperature control
  • Check the blower motor and fan operation
  • Measure airflow to ensure proper ventilation

4. Safety Checks

  • Test for gas leaks or carbon monoxide emissions
  • Ensure proper ignition and burner function
  • Verify venting and exhaust system performance

How Often Should You Schedule Furnace Maintenance?

We recommend scheduling a furnace tune-up once a year, ideally in the fall before the cold weather arrives. Regular maintenance ensures your system is ready to handle winter’s demands.

Signs Your Furnace Needs a Tune-Up

If you haven’t had your furnace serviced in over a year, or you notice any of the following issues, it’s time to schedule a professional maintenance check:

  • Uneven heating: Some rooms are colder than others
  • Strange noises: Banging, rattling, or squealing sounds
  • Frequent cycling: Furnace turns on and off too often
  • Unusual smells: Burning or musty odors when the furnace is running
  • High energy bills: A sudden spike in heating costs

Furnace Maintenance vs. Repairs: What’s the Difference?

Furnace Maintenance

  • Preventative care to keep your system running efficiently
  • Involves cleaning, inspecting, and minor adjustments
  • Recommended once per year

Furnace Repairs

  • Address specific issues like broken components or system failures
  • May be needed if maintenance was skipped
  • Costs more than routine tune-ups due to emergency service or part replacements

DIY Furnace Maintenance Tips

While professional tune-ups are essential, there are a few simple steps you can take to keep your furnace in good shape between service visits:

1. Change Your Air Filter Regularly

Replace the furnace filter every 1-3 months to maintain proper airflow and prevent dust buildup.

2. Keep Vents and Registers Clear

Ensure all air vents are open and free from obstructions like furniture or rugs to allow even heating.

3. Check the Thermostat

Make sure your thermostat is set correctly and working properly. Consider upgrading to a programmable or smart thermostat for better efficiency.

4. Listen for Unusual Noises

If you hear any strange sounds coming from your furnace, call a professional before the issue gets worse.

Why Choose Dor-Mar for Furnace Maintenance?

  • 60+ Years of Experience – Trusted since 1962
  • Certified, Licensed Technicians – Skilled professionals dedicated to quality service
  • Comprehensive Tune-Ups – Thorough inspections and maintenance for peak performance
  • Upfront Pricing – No hidden fees, just honest service
  • Priority Service for Maintenance Customers – Get faster service and exclusive discounts with our Home Comfort Membership

Schedule Your Furnace Maintenance Today!

Don’t wait for a breakdown—schedule your annual furnace tune-up with Dor-Mar today. Remember, customers with the Dor-Mar Home Comfort Membership plan get reminders and have their maintenance visits automatically planned each fall.

Keep your home warm, safe, and efficient all winter long!

See What Our Many Satisfied Customers Say…

Dor Mar Heating & Air ConditioningExcellentDor Mar Heating & Air Conditioning4.6 Based on 1411 reviews fromSee all reviews review us onMatt KeenerMatt Keener ★★★★★ Pam GroomesPam Groomes ★★★★★ Our service man Wes was on time, gave us a call he was coming, very courteous and did a great job. We continue to use Dor Mar for all our heating and cooling needs. I would recommend Dor Mar to anyone needed heating and cooling expertise.Response from the ownerWe appreciate the great review Pam! Stanley HortzStanley Hortz ★★★★★ DJ did a great job. Been using Dor Mar since 1986.Response from the ownerWe appreciate you taking the time to leave a great review Stanley! Karen KelleyKaren Kelley ★★★★☆ Calob Brewer was polite & was thorough in servicing my A/C. First time in 4 years that a DorMar Tech washed my A/C unit.Response from the ownerThank you for the good review of your technician Karen, if there is anything that'd help us to improve to a 5-star rating in the future please be sure to let us know! Marquita MooreMarquita Moore ★★★★★ I had my annual AC service check performed by Jayden today. He arrived at the beginning of my window of time which was great. He was informative all around, he told me what he was doing, he answered my questions, he was respectful and overall quick & efficient. Thank you Jayden for yet another great AC/HVAC check! I appreciate you!!Response from the ownerThank you so much Marquita for continuing to choose Dor-Mar and always taking the time to leave such a thoughtful review about your appointment with our technician! Ralph GilesRalph Giles ★★★★★ Technician arrived on time and did a great job. Very professional !!Response from the ownerThank you Ralph for the great review! Ashley WarnerAshley Warner ★★★★★ Seth was great and addressed my concerns today with plumbing issues. I appreciated him taking the time to explain the issues and what needed to be done to fix it. He was knowledgeable and friendly. I will definitely be requesting to use him next time!Response from the ownerWe appreciate you taking the time to leave such a thoughtful review for your technician Ashley! Robert WilsonRobert Wilson ★★★★★ Response from the ownerThank you for the 5-star review Robert! Connie SteedConnie Steed ★☆☆☆☆ Waited all day the first appointment you gave me. No call from your office saying it was canceled. Then when called to see why no one showed up. You said wasn't on any appointment list. So I got on appointment a month later just to be charged 215.00. For your tech to tell me I need a new ac unit. Your company is a rip off. No star but you have to put 1 star to post.Response from the ownerUnfortunetly Connie, we are unable to locate you in oiur system to be able to look into your issue. If you could please reach out to kayden@dormarhvac.com or our main office @ 740-345-6639 so we may address these issues; it'd be greatly appreciated! T HartmanT Hartman ★★★★★ Response from the ownerWe appreciate the 5-star review! Valerie CoeValerie Coe ★★★★★ Response from the ownerThank you for the 5-star rating Valerie! American JusticeAmerican Justice ★★★★★ Response from the ownerThank you for the 5-star review! John HansonJohn Hanson ★★★★★ Response from the ownerWer appreciate you leaving us a 5-star review John! Swen A Hunt Sr.Swen A Hunt Sr. ★★★★★ Response from the ownerWe appreciate the 5-star rating! Joel GardnerJoel Gardner ★★★★★ We just had our yearly furnace check. Our technician Brian was courteous, efficient, and friendly. Dor-Mar has been keeping our furnace, AC, and water heater in top shape for over six years now.J.GardnerResponse from the ownerWe truly appreciate you leaving a great review about your expirience with us Joel! Ryan KnightonRyan Knighton ★★★★★ Mack and Jayden are the best technicians I’ve ever met. They will go way out of their way to help you make sure the job is done right. I can’t stress enough how awesome they are. Highly highly recommend. They’re the best. Mack and Jayden rule the world!! Thanks again from 116 s 32nd st. God bless you guys!Response from the ownerThank you Ryan for leaving your technicians a great review! John MorganJohn Morgan ★★★★★ Zack is an amazing technician. He is very good at what he does. Highly skilled. And quite honestly one of the most genuinely kindest repairmen I've ever had at my house. This was an exceptional experience from start to finish. Once again Dor Mar came through with a kind professional repairman that knew exactly what he was doing!Response from the ownerWe truly appreciate you taking the time out of your day to leave such a thoughtful review for your technician John! Cindy MitchellCindy Mitchell ★★★★★ Response from the ownerThank you Cindy, for the 5-star rating! Dee Ann NilgesDee Ann Nilges ★★★★★ Seth did a great job. I was so frazzled because we discovered out water heater leaking last nite. It was late, but I got the phone service for Dor Mar and they said they could schedule us for Wednesday. it was Monday nite. I said yes, but I didn't know how to stop the water. We finally figured out to stop the pump to the well. Then I got news that Dor Mar could send someone today, and I was so excited!! Seth got here looked at everything, gave us a very reasonable quote and we agreed. He found a second leak and fixed that. I am very happy with his work, and have calmed down from the nite before. Thank you SethResponse from the ownerThank you so much Dee for taking the time to leave such a detailed review about your expirience with us and your technician! Russell SmithRussell Smith ★★★★☆ Response from the ownerWe appreciate the good rating, if there is anything that will help us imrove to a 5-star rating next time wed appreciate the feedback! leslie hueyleslie huey ★★★★★ Steve, at Dor-Mar H&C did a great job, friendly, explain to me about my maintenance on my air conditioner. Put my air conditioner unit back on the slab of concrete better. Definitely would recommend them.Response from the ownerWe appreciate you taking the time to leave such a thoughtful review for your technician! Nancy RadebaughNancy Radebaugh ★★☆☆☆ Nice guy but he never got back to me about an estimate for the actual repair. He did zip tie one duct and I was charged way too much for just that.Response from the ownerNancy, it doesn’t seem that we charged you anything. Looks like Trevon was there yesterday to give an estimate on poor airflow. But we havnt charged you anything since your duct cleaning in March Christine JonesChristine Jones ★★★★★ Response from the ownerWe appreciate you leaving us a 5-star rating Christine! Scott RichmondScott Richmond ★★★★★ Response from the ownerWe appreciate the 5-star rating Scott! Betsy RussoBetsy Russo ★★★★★ Doug Snow and his coworker Tyler were absolutely wonderful professional and knew what needed to be done. Even though they ran into some unexpected problems all was taken care of and I am very happy with the entire process. I have absolute confidence in their work.Response from the ownerThank you so much Betsy for taking the time to leave such a great review for your technicians. We truly appreciate the customers like you! Andrew FagerstormAndrew Fagerstorm ★★★★☆ As far as I know, ac is operating as it shouldMail the (2) service call invoice copies to401 McIntosh DrHoward, OH 43028ThanksResponse from the ownerWe appreciate the good rating and we will be sure to mail you your invoices! Bess BrownBess Brown ★★★★★ Steve was very professional, detail and informative with the care of our air conditioner unit. We gave our units under a maintenance agreement and totally love this process.Response from the ownerWe appreciate you taking the time to leave your technician a great review about your expirience with us! Jerry GoodmanJerry Goodman ★★★★★ Response from the ownerThank you for the 5-star rating Jerry! Dakota HackerDakota Hacker ★★★★★ Trevon came out and inspected my ac unit. Knowledgeable individual with a great attitude despite the heat and muggy weather. 10/10 would recommend this company for your HVAC needs.Response from the ownerWe truly appreciate you taking the time to leave your technician a great review Dakota! Chip SantosChip Santos ★★★★★ Response from the ownerThank you for the 5-star rating Chip! Christine BurkampChristine Burkamp ★★★★★ Quick and friendly!Response from the ownerThank you for the great review Christine! Derek SannerDerek Sanner ★★★★★ Response from the ownerWe appreciate the 5-star rating Derek! Dan BarnettDan Barnett ★★★★★ Punctual and polite. Very knowledgeable. Respectful and answered any and all questions. Highly recommend.Response from the ownerWe appreciate bthe great review Dan! Darren HallDarren Hall ★★★★★ Response from the ownerThank you for the 5-star rating Darren! Terri GuoTerri Guo ★☆☆☆☆ We paid the yearly maintenance fees, they didn’t do the maintenance at all only charged for the money, the maintenance guy said my furnace need to put a UV light to kills the moisture, when he came he told me our water heater need to be replaced and he said if we buy the water heater from them he’ll install the UV LIGHT for free at least 50% off, and clean it for free. After we replaced the water heater they didn’t do it, we still paid a lot money for the UV LIGHT and they didn’t clean it at all so DisappointedResponse from the ownerWe appologize that you have had your maintenace reasxheduled a couple of times Terri, unfortunely with the heat wave we expirienced all working units had to be moved off of the schedule to take care of people without working ACs. As far as the UV light our record indicates extensive notes on where we installed a UV light at one of your properties and that you canceled the one for your home address. If you wish to further discuss your issues you may reach out to our office. Dorothy McCulloughDorothy McCullough ★★★★★ Trevor did an awesome job. He was so professional and nice.Response from the ownerThank you for leaving your tech a great review! John MJohn M ★☆☆☆☆ We experienced some mixups with their after hours phone service but then finally the tech shows up and says "I called my boss and we don't service geo-thermal systems" When we explicitly told them that is the system we had and they show on their web site as servicing/installing geo-thermal. in the end it was just a run around and ended up going with another company that worked out great.Response from the ownerWe apologize for the miscomunication John, we are currently working to correct the issue with our Live Services to further inform them on vthe types of units we do not service. We have also double checked our services lsited on our website and Geothermal units are not on that list. Again we apologize for the miscomunication and are working to ensure this doesnt happen again. Josh HarshbargerJosh Harshbarger ★★★★★ Anthony was so great! Polite, knowledgeable, and efficient. Thanks for repairing our leaks!Phyllis NelsonPhyllis Nelson ★★★★★ Response from the ownerWe appreciate the 5-star rating Phyllis! Tanya ClarkstonTanya Clarkston ★★★★★ Great service! Friendly! Calob B was fast, efficient, friendly & knowledgeable!Response from the ownerThank you Tanya for leaving your tech a great review! Aaron JacksonAaron Jackson ★★★★★ Response from the ownerWe appreciate the 5-star review Aaron! Josh PratherJosh Prather ★★★★★ Good all around.Response from the ownerThank you for the 5-star review Josh! Lee annLee ann ★☆☆☆☆ DorMar does my sister’s HVAC and she has a yearly maintenance contract. SHE is unable by phone or text due to an illness. DorMar came out 3 times during my time as my sister’s Personal Home Manager and POA (in writing). A supply vent has mold and now and they are refusing to come to investigate and/ot provide a quote to fix this serious problem on their work. Even with my sister’s permission in writing and agreement to pay DorMar - they refuse to come to investigate mold on a supply register. Delaying service is going to make it worse and could be deadly.Response from the ownerUnfortunetly Lee, when it comes to scheduling services outside of the maintenace agreement that has been paid for by your sister we have to have consent straight from your her or a legal document stating you are POA and can make decisions for the property. Our system tracks every phone call and we have it on record that on 6/27/2025 in a phone call between you and one of our CSRs that you are not POA this means you are not able to schedule these appointments. Legally we are not able to schedule anything without that documentation or consent straight from your sister. If you are able to provide either of those we will be happy to schedule a service to inspect the issues going on in the Ductwork/HVAC in the home. WAYNE LWAYNE L ★☆☆☆☆ My ac stopped working this evening. This company claims 24 hours service but reluctant to provide service for 2 days. What happened to prompt service? The lady on the phone couldn't speak clear English. This company claims prompt service but fails to do so.Response from the ownerUnfortunetly Wayne with the heat wave we have had this past week our schedule has been booked a couple days in advanced for this entire past week. We always try our best to do same day service but our schedule can still book up. Dorothy MoorheadDorothy Moorhead ★★★★★ Service call yesterday for issue of short run and inefficient cooling after being inspected 3 weeks ago and deemed in good working order resulted in discovery of king valve being mostly closed and starving system of coolent then the system being bleed down to where it had to be shut down due too tech having trouble disconnecting equipment (reverse threads) .As tech didn’t have coolant on His truck - received text schedule for today between 8-12 to recharge the system - now 1:25 and still waitingSean GradySean Grady ★★★★★ DorMar was quick to respond during a heat wave for my AC being out. The tech (Greg) was quick and professional. Thank you!Response from the ownerThank you Sean for leaving a great review about your expirience! Ken NethersKen Nethers ★☆☆☆☆ My girlfriend had their so called tech come to the house 6/21 /25, he trampled her flowers just to break his meter out and tell her your ac is fried, $7000 to replace, called her nephew the next day, he fixed a burnt wire end ( it gave no reading), trimmed it and bam works like new. They charged $250, to work 10 minutes , trample flowers and leave everything unhooked. Never again will they rob me of my money or time, lousy tech and service. Ps ac is 1997 works fineResponse from the ownerWe apologize that you had such a poor expirience with our technician, we are currently dealing with the issue to ensure it doesn happen again. We appreciate the honest feedback and letting us know what went wrong with your appointment. Yalin LiuYalin Liu ★☆☆☆☆ Worst customer service. Been understanding and trying to work with their schedule, rescheduled my paid maintained twice already, when they called third time to reschedule I refused. their response is nothing they can do. And they can’t refund my money. Not recommended.Response from the ownerWe are sorry you have been rescheduled more than once Yalin, unfortunetly with the heat wave we have expirienced since last week we have had an abundant amount of non working units on our schedule, and being short staffed we are trying our best to keep Prevantative maintenaces scheduled when we can but we arent always able to keep working units scheduled. S HawkinsS Hawkins ★★★★★ Anthony was greatResponse from the ownerThank you for leaving our tech a great review! Rupal ShahRupal Shah ★☆☆☆☆ Horrible customer service. Worse follow through. Poor Management and Leadership.We called Dor Mar because we were having issues with our heater. Here is a timeline of what happened on the days they came:--Feb 21: They came but the technicians didn't do anything because they didn't know what to do.--Feb 26: They came and broke the heater. They admitted to it, which led to further issues. The bigger issue is that we had no heat after that for several days. I called Dor Mar three times after that to get them to urgently come and make repairs.--Feb 28: They said they would come and fix the issues but no one from Dor Mar came. So I called again.--Mar 1: A technician came and started to fix things. At that time, gas started leaking and smelling throughout the house. Therefore, he stopped the work and left the house. So i called again and asked for someone to come who knows what they are doing.--Mar 3: They finally came and fixed the issues. Heat didn't start working again until Mar 3.During that time frame, employees Dave, Trevon, and Brad from Dor Mar because each of them worked on our house and not only did it take several tries, in between that time it caused us inconvenience from Feb 21 to Mar 3 because we didn't have heat and the day of the gas leak we had to open all windows/doors in the entire house and air it out. This was all happening during a time when the weather was cold!!!I called their operations manager 3 times with no response and emailed them 2 times with no response. I would pay the bill but I was asking for a discount or some compensation for the gross negligence caused by lack of heat, and gas leakage. They provided no discount, no apologies for the issues caused, and no response to any of my inquiries.To this day, no one called me back. No one emailed me back. Instead, they kept sending me invoices every few days for the full amount to pay them which was close to $2000.I am disappointed in their customer service. I would summarize them as have poorly trained technicians and staff, and even worse management and leadership etiquette. I would never recommended them and hope people read my review before considering them.js_loader

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