Markl and Sons

  • Call Us Today
    (903) 893-3060
  • Hours
    8:00 am to 5:00 pm
  • 119 East Brockett
    Sherman, TX 75090

Check Out Our Blogs - Markl & Sons Cooling & Heating

What to Know About an HVAC Repair Contractor in Denison, TX

Posted: August 20, 2025

When your air conditioner goes out in the middle of a Texas summer or your heater gives up during a freezing winter night, you need help fast. That’s why choosing a local HVAC repair contractor in Denison, TX, is not only convenient but also smart. Local professionals like Markl & Sons Cooling & Heating bring not…

Customer Reviews

Relieved and thankful!!!!
Thanks to John Markl for getting his son Randy to my house in 10 minutes and getting my air fixed today. I was near tears this morning when my home warranty sent a company from Dallas area and said I needed a new unit for $4000 and my warranty company (Choice Warranty) wanted to pay only $350 of it. Thanks John and Randy, you’re the best!!!

Amy J

I was dreading a huge bill but when the service man came by it was a simple fix. Thanks for the honesty.

Larry S.

Markl & Sons are great!! They were super fast and completely professional - we are so impressed with the company, their products, and their customer service!! Thank You Markl & Sons!!

Brenda R.

Friendly and fast same day service. The two guys that came out were very knowledgeable and had our old AC unit up and running within an hour after replacing a part.

Luis C.

Very helpful, came and showed me what the problem was and gave me advice on how to avoid the problem in the future. I highly recommend.

Mukhtar B.

Residential Financing Available

The Wells Fargo Home Projects® credit card is issued by Wells Fargo Bank, N.A. with approved credit. Apply for the Wells Fargo Home Projects® credit card by selecting the button below.

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We are LICENSED, BONDED, AND INSURED and proud members of the Sherman Chamber of Commerce.

TACL A17682C

Services

Design
Installation
Heating & AC Repair

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Phone: (903) 893-3060

119 East Brockett
Sherman, TX 75090