15+ years • 6,500+ jobs completed • 1,500+ Oklahoma homes served

Straightforward pricing

• $99 dispatch on every truck roll. Free on new-install estimates.
• $210 flat residential service call: $99 dispatch plus $111 diagnostic. The diagnostic does not reduce the repair price.
• $99 back: accept my written repair estimate within 10 days and I give the $99 dispatch fee back.
• Free estimates on new installs. No charge to walk through replacement options.

Call (405) 375-4822. 4.8 stars, 300+ Google reviews.

• R-454B and R-32 refrigerants now standard on new equipment. Both are mildly flammable A2L. R-454B recovery $445, R-32 recovery $395. About 50% pricier per pound than R-410A. I stock both.
• Hard Start Kit $415 installed + BEST surge protection bundle $1,225 (control board spike + transformer + in-line fuse). One $1,225 surge fix beats one $3,195 compressor replacement after Oklahoma lightning.
• Free second opinion on any repair quote. Most competitors charge or refuse. Weekday mornings, repair customers welcome. Call 405-375-4822.

HVAC Service Near Me in Dover, Oklahoma | Hartzell’s Heat & Air

I run HVAC service in Dover, Oklahoma, about fifteen minutes north of my shop. I have been doing HVAC for forty-five years and hold NATE certification along with my Oklahoma Master HVAC license, so when I come out you are getting the person who actually fixes the problem, not a salesperson. Out here in Kingfisher County, what I see most is classic well-built homes where I treat the HVAC like part of the family. Call 405-375-4822 or book at hartzellsheatair.com and I will get you scheduled.

📞  Call (405) 375-4822

AC Repair  ·  Heat Pumps  ·  Geothermal  ·  Maintenance Plans

HVAC Services in Dover

Dover, Oklahoma: The Town the River Built and the Bridge Destroyed

Dover sits on land that was a Chisholm Trail trading post before it was ever a town. The Red Fork Traders’ Ranch stood here, and cattle drives moving north stopped at this crossing. The trail that built the Oklahoma cattle economy passed right through what is now Dover’s main street.

On September 18, 1906, the Cimarron River bridge gave way under Rock Island Railroad passenger train No. 12. At least 100 people died. It was called one of the worst train wrecks in American history at the time. The cars went into the Cimarron River and sank. The Cimarron runs on a sand and silt bottom, and heavy objects that go in do not always come back out. Those railroad cars have never been fully recovered. They are still in the river bed below where the bridge stood. Dover carried that weight, and the town that might have grown into something significant instead became the small farm community it is today.

Dover was also home to Lincoln College in the early 20th century, one of the few institutions in the Oklahoma Territory providing higher education to Black residents before statehood and desegregation. That is the kind of history most towns do not talk about. Dover has it.

What that history means for the homes here: Dover is farm country with a few older structures mixed in, propane heat is common, and the housing stock is a mix of post-war farmhouses and newer builds on rural acreage. I service this area regularly. If you are out on a county road off Highway 81 and your heat pump stops working in January, I can usually get there the same day. Call 405-375-4822.

Why Dover Homeowners Choose Hartzell’s

• Upfront pricingyou know the cost before work starts, every time
• NATE Certified techniciansnationally certified, not just trained in-house
• Manual J sizing on replacementsI calculate the load, I don’t guess
• IGSHPA Accredited geothermal installerone of very few in Oklahoma
• Trane TCS SELECT & Mitsubishi Diamond Dealerpremium brands installed right
• Serving Kingfisher County for 15+ yearslocal crew, your neighbors

Frequently Asked Questions