Dor-Mar Heating & Air Conditioning | Central Ohio's Most Reliable HVAC Company
HVAC customer service in Newark, Ohio | Dor-Mar Heating & Air Conditioning
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Heating and Air Conditioning Service Nearby

Air Conditioning
Heat Pumps
Water Heaters
Thermostat installation & Repair
Air Cleaners
HVAC Maintenance

Why Choose Dor Mar
Heating & Air Conditioning in Johnstown, Ohio?

Since 1962, Our Customers Have Been Experiencing Our Fast, Friendly Service

Fair Pricing

You can be sure the price you're paying for repairs, maintenance or new equipment installation is a fair price in your local market.

24/7 Service

Our offices are open during regular business hours, but you will always speak to a real person if you have an after-hours no-air or no-heat emergency!

Qualified HVAC Experts

Our service technicians are NATE-certified and receive ongoing monthly training. You can count on getting the right answer for your heating and cooling questions.

Heating and Air Conditioning Service, Repair and Installation Services You Can Count On

Serving Johnstown Ohio and Licking County Since 1962

Meet the Dor-Mar Team | Newark Ohio Professional HVAC service technicians, installers and customer service representatives
Meet the Dor-Mar Team | Johnstown Ohio Professional HVAC service technicians, installers and customer service representatives

HVAC Contractor

Dor-Mar is one of the highest rated HVAC contractors in Johnstown Ohio. In business since 1962, we consider our customers the most important part of our business, and it shows in our online ratings.

What does an HVAC Contractor  do?

An HVAC contractor is a business whose service technicians are tasked with installing, maintaining, and repairing heating, ventilation and air conditioning systems. In the state of Ohio, a professional license is required for a company to perform these services. Learn More About HVAC Contractors

Heating Contractor

One of our primary services is to serve Central Ohio’s needs as a Heating Contractor. The job of a heating contractor is to install, repair and maintain heaters, ventilation systems, and air conditioners. This includes associated equipment like ductwork, thermostats, furnaces, heat pumps and boilers. Some heating contractors offer additional services like performing energy audits, cleaning ductwork, installing indoor air quality equipment, or sealing ductwork.

The Best Heating Contractor Keeps Your Family Comfortable

If your heating equipment breaks, or is in need of any type of maintenance, repair, or replacement, a heating contractor is the right professional to reach out to. Find out more about Heating Contractors

Heating Equipment Supplier

In addition to maintaining and repairing heating equipment, furnaces and heat pumps, Dor-Mar offers replacement equipment. When it’s time to replace your heating equipment, it’s just as important to choose the right equipment supplier or installer as it is to choose brand, BTU, efficiency, and other elements of your system. If you are spending money to repair a heater that’s more than 10 years old, it might make more sense to replace it with a new, more energy-efficient furnace. Undoubtedly, the new system will use less energy simply because newer units include improved technology. Central Ohio’s Top Heating Equipment Supplier

Furnace Repair Service

Dor-Mar Heating and Air Conditioning is an award-winning Furnace Repair Service in business since 1962. We’ve been providing professional, timely heater repair and maintenance services to central Ohio since 1962. Our certified and highly-trained furnace technicians are ready and available around the clock to quickly respond to your lack of working heat. Our goal is to get your family back to comfort as quickly as possible.

24/7 Furnace Repair Availability

Our expert HVAC team is available during regular business hours, all night/every night, on weekends, evenings, and holidays, to provide quick access to the area’s top furnace repair service at a reasonable cost. Get Expert Furnace Repair Service

Fast, Reliable Air Conditioning Repair Service

Dor-Mar Heating and Air Conditioning provides expertly trained and EPA-certified technicians to perform fast and reliable repairs to residential and/or commercial air conditioning systems. We service all major brands, providing A/C repairs, heat pump repairs, and central air conditioning repairs.

We can perform repairs on many types of air conditioning systems or A/C parts, including:

  • Air Conditioning Repairs
  • Emergency Air Conditioning Repairs and Service
  • 24/7 Air Conditioning Repairs
  • Heat Pump Repairs
  • Ductless AC Systems
  • High Velocity AC Systems
  • Central Air Conditioning units
  • Compressor Repairs
  • Freon or Puron coolant leak repairs
  • Emergency A/C repairs
  • Air Conditioning Zoning
  • A/C Tune-Ups and routine maintenance

Our team’s AC repair expertise includes all major makes and models of central air conditioning and heat pump systems. Whether your AC equipment is old or new, if you’re looking for a minor or major repair, routine maintenance, or a complete replacement, Dor-Mar Heating and Air Conditioning is the company to call. Find out more about Dor-Mar’s Cooling Repair Services. Get Expert Air Conditioning Repair Service.

Central Ohio’s Highest-Rated Air Conditioning Contractor

Air conditioning contractors install, repair, and maintain the central air conditioning equipment, ductwork, electrical equipment, and controls found in residential and commercial cooling systems.

Did you know that most consumers view online reviews as reliable as a personal recommendation? There are a number of review websites where you can read detailed descriptions of a particular homeowner’s experience. Often these sites also have a 1-to-5 star rating system. Look for a high review count (meaning the company has been around for a while or service a large number of customers) and a high average rating, no less than 4.5 stars. You can also see if the company is actively paying attention to, and responding to, consumer reviews.

Dor-Mar Heating and Air Conditioning has accumulated more than 1,000 reviews and has an average rating of 4.83 stars on Google. We make it a point to respond to every review, positive or (the rare) negative review. If something went wrong, we work to make it right.

Contact the most trusted Air Conditioning Contractor in the Central Ohio area.

Air Conditioner Installation and Replacement

As your old A/C system deteriorates with age, it must work much harder to cool the air inside your home. This means it’s necessary for it to consume more energy to deliver the desired temperature. When you consider this and the significant difference in the energy efficiency of current air conditioning systems versus those manufactured only 15 or 20 years ago, it’s easy to see how switching to a new, state-of-the-art system will represent substantial savings on your energy bills.

Installing a new air conditioning system is not a job for a weekend warrior. The installation must be completed in accordance with local and state building codes and following the manufacturer’s specifications in order to protect your warranty. The job demands a licensed and trained professional like the ones at Dor-Mar Heating & Air Conditioning.

Contact us for a free estimate for replacement air conditioning equipment.

About Dor-Mar

Dor-Mar Heating & Air Conditioning has attained a track record as Central Ohio’s most reputable, trustworthy HVAC contractor. With offices and service technicians on call throughout the metro Columbus, Newark and Zanesville areas, we bring courteous, family-oriented service to your home, oftentimes the same day.

Beginning as a small door-to-door company, our family owned and operated venture has grown to one of the premier heating and cooling service companies in Ohio. We hold our employees to the highest standards to provide our customers with the absolute best HVAC service possible. Our 30+ employees are passionate about taking care of your needs in the speediest, friendliest, most efficient manner possible. Our service technicians, installers, customer service representatives, office personnel and management attend frequent training sessions, ensuring we stay in front of updates in the ever-changing HVAC industry.

As a result of our effort and dedication to customer care, Rheem & Coleman recently acknowledged us as a “Top Team Contractor.” We offer free quotes on new equipment, and provide homeowners with 24-hour professional service.

Call Dor-Mar Heating & Air Conditioning to arrange a service appointment for your home’s air conditioner, heat pump or furnace, or for a free, no-obligation consultation to determine the perfect system for your home or business, regardless of size.

We anticipate adding you to our long list of delighted customers in the Johnstown area.

Rheem heating and cooling products

See What Our Happy Customers Are Saying…

We've been satisfying loyal customers since 1962.

"Dor Mar is a reliable, responsible business we have used for many years. They call and schedule maintenance check ups and follow up with reminders. The technician called when he was 30 minutes out. He was friendly and informative and made sure all of our equipment was safe and all questions were answered. I highly recommend Dor Mar!"
Laurie T
"Doug and Dave installed my new furnace and they were great! Informative, and they even put down a cloth to not get footprints on the floor inside. Wes was the one who came to check out my old furnace before and he was great too!"
Stephen S
"My furnace was pushing cold air one morning and I gave Dor-Mar a call around noon to get someone out to look at it. Wes arrived less than 2 hours later and identified the faulty part, but more importantly, got my furnace running while we waited for the part to ship. The next day, the problem came back, but Wes walked me through the process over the phone to get the heat back on. The part came the next day and I couldn't be happier with how the entire interaction went. Wes was kind and extremely knowledgeable and I can't recommend them enough!"
Matt H

7 Locations

More offices mean we can dispatch one of our certified service technicians to your door quickly.

24/7 Service

Our offices are open during regular business hours, but you can reach our dispatch person 24/7. We are there when you need us!

Local Numbers

Never a toll call or long distance charge. Our phones and highly-qualified service techs work at YOUR location.

Local Reviews
for Johnstown, OH

Dor-Mar Heating & Air Conditioning Rated 4.9 out of 5 stars based on 41 customer reviews

Map of Johnstown, OH 43031

Good job!

Review of Dor-Mar Heating & Air Conditioning


JohnstownOH43031 40.1575-82.69

Map of Johnstown, OH 43031


Review of Dor-Mar Heating & Air Conditioning

Quick response and professional repair!

JohnstownOH43031 40.165-82.6275

Map of Johnstown, OH 43031

Great Service

Review of Dor-Mar Heating & Air Conditioning

Mack did a great job! He was prompt, respectful, and very thorough!

JohnstownOH43031 40.16-82.6825

Map of Johnstown, OH 43031

Outstanding Service

Review of Dor-Mar Heating & Air Conditioning

JohnstownOH43031 40.11-82.6625

Map of Johnstown, OH 43031

Awesome Job!

Review of Dor-Mar Heating & Air Conditioning

Khyrenn did a great job! He was very professional and knowledgeable!

JohnstownOH43031 40.16-82.6825

Map of Johnstown, OH 43031

Very Prompt and Helpful!

Review of Dor-Mar Heating & Air Conditioning

Wes does a great job! He is prompt, and helpful during the sales process!

JohnstownOH43031 40.16-82.6825

Map of Johnstown, OH 43031

Excellent Service very friendly

Review of Dor-Mar Heating & Air Conditioning

JohnstownOH43031 40.21-82.5625

Map of Johnstown, OH 43031

Excellent Servixe

Review of Dor-Mar Heating & Air Conditioning

Call was professional and helpful during his visit. He answered all my questions and took the time to explain the process. I highly recommend Calob.

JohnstownOH43031 40.1425-82.6975

Map of Johnstown, OH 43031

Excellent Company

Review of Dor-Mar Heating & Air Conditioning

Nice techs. Meet a tech a few years ago at a supply place trying to buy a part for my a/c, he called his office for me and they sold me the part. Nice company

JohnstownOH43031 40.1725-82.615

Map of Johnstown, OH 43031

Excellent service

Review of Dor-Mar Heating & Air Conditioning

Great customer service

JohnstownOH43031 40.15-82.6825

Jayden M.

Jayden M.

Goodman system running smooth , 90degrees outside and everything seems to be performing correctly. Thank you for choosing DorMar as Your Climate Hero!

Near N Oregon St, Johnstown, OH 43031
Jayden M.

Jayden M.

Changed out rusty capacitor. Cap was super weak , AC would not have ran if it was 90 degrees and up. Put in a titan pro , unit is now operating as should. Thank you for choosing DorMar as Your Climate Hero!

Near Concord Rd, Johnstown, OH 43031
Wes  F.

Wes F.

estimate sent waiting

Near Wolf Ct, Johnstown, OH 43031
Willie N.

Willie N.

Checked out furnace everything is working great got good. Heat rise. Good pressures on gas valve. Nothing is wrong with furnace at this time. Did sell customer maintenance agreement. Everything is good

Near Liberty Church Rd, Johnstown, OH 43031
Calob B.

Calob B.

Package u it is running grea

Near Yardner St, Johnstown, OH 43031
Calob B.

Calob B.

Ac is running great! Amperage good Freon good filters good coils clean

Near Van Fossen Rd, Johnstown, OH 43031
Calob B.

Calob B.

Ac is running great! Freon good, 20 temp split. 45 slt, coils sprayed and cleaned, great amperage both indoor and outdoor

Near N Main St, Johnstown, OH 43031
Zach S.

Zach S.

Element assembly replace and vent repair

Near Dutch Ridge Way, Johnstown, OH 43031
Trevon S.

Trevon S.

Today, we have performed necessary routine maintenance on your air conditioning unit. Our technician diligently conducted an examination of both the indoor and outdoor coils to ensure their satisfactory condition. Furthermore, we carefully inspected all electrical connections for any signs of damage and assessed the amp readings of the blower motor, condenser fan, and compressor. Thorough examinations were also conducted on the refrigerant pressures, as well as the contactor and capacitor readings.

Near Duncan Plains Rd NW, Johnstown, OH 43031
David A.

David A.

Ac maintenance

Near RidgeView Ct, Johnstown, OH 43031


HVAC customer service in Newark, Ohio | Dor-Mar Heating & Air Conditioning

PLEASE NOTE: If you are a renter, please have your landlord/owner contact us directly to schedule service. We can only work with property owners.


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HVAC customer service in Newark, Ohio | Dor-Mar Heating & Air Conditioning


Our Comittment to Your Family’s Health & Safety

Learn what we’re doing to keep you and your family, as well as our employees, safe from the spread of the virus as we service your heating and cooling needs.