Give us a call! 405-912-5900

Interstate Heating and Air Conditioning has been the loyal provider of HVAC services in Norman, OK since 2002. From AC repair and AC replacement to complete Furnace repair, we are the pros you can trust to get the job done correctly. Our Certified AC technicians, really know heating and cooling and will have your air conditioner or furnace repair done quickly. If you need an Air conditioner installation or a furnace installation, we can help with that too. Ask about convienent financing options for a new HVAC system.

If you want to see why Norman, OK chooses us for heating and cooling when quality is needed, just have a look at our reviews.

UV germicidal lights purify the air by killing up 90% of all microbes, mold spores and viruses. For allergy sufferers and those prone to health problems, UV lights are very beneficial. The UV light in an air conditioning unit is positioned in the system’s return air duct, zapping particles and oxidizing the air as it passes through.

For more information on UV lights, click here or contact us online and one of our knowledgeable team members will be in touch. Our company has been providing indoor air quality solutions to the Norman area for almost 20 years. At Interstate Heating & Air Conditioning, we provide expertise in heating and cooling at an affordable cost, satisfaction guaranteed.

In the Norman area, residents can expect to pay between $3,600 – $6,600 to replace a central air conditioning unit. The end price will be determined by the size of the house, the quality of the unit, and the complexity of the ductwork involved.

Average Cost: $5,000
Typical Range: $3,600 – $6,600

If you think it’s time to replace your AC unit, Interstate can help. We offer free estimates on all of our services, including installations. Our highly trained and experienced technicians are certified so you can rest assured that the installation will be completed with no mistakes. We offer competitive prices on quality units as well as financing options. Contact us online to learn more or to schedule a consultation!

Your air conditioner is freezing up because either something has adjusted your system to cause the evaporator coil to cool more than it should or there is a block in the air flow in your house that is keeping air from transferring its heat to your system. Some ways you can avoid having this occur include:

  • Have a technician check for refrigerant leaks.
  • Change your air filter.
  • Check that the blower fan is functioning properly.
  • Make sure there are no blockages in your condensate drain line.
  • Inspect your vents for any obstructions.

For more information or to schedule a service check, contact Interstate online and one of our knowledgeable team members will be happy to assist you. We are available 24/7 to keep your home cool around the clock.

The average cost for an HVAC repair is around $350-$600 in Norman, OK. Although, the cost of the repair can vary due to the type of repair, the level of the repair and the cost for replacement parts. A refrigerant leak repair can cost up to $1,200 depending on the type of refrigerant your HVAC system uses and how severe the leak is. If your HVAC system uses R22, the repair cost will be higher since R22 has been discontinued and is more expensive to obtain. To get your HVAC system repaired, give us a call today.  

Local Reviews
for Norman, OK

Interstate Heating & Air Conditioning Rated 4.9 out of 5 stars based on 160 customer reviews


13 year customer




Review of Interstate Heating & Air Conditioning

My wife and I are 13 year customers. Actually, my wife even used Interstate before we were married. Mike was a good example of Interstate quality service. We have a service contract that provides checking our equipment twice a year and making necessary adjustments, replacement of parts at discount prices, and replacement of unit if necessary. I recently called Interstate to set up our bi-annual visit. In my discussion with the home office, I mentioned that our unit was having trouble keeping up with the temperature set on the room temperature and was running 4 degrees above the thermostat setting. It was a Saturday, and scheduled a serviceman to check our unit. Mike was here later that same day. I would have to say that he went the extra mile in provision of service. When I told him I had requested the bi-annual check-up, he told me that they had me down as a regular service call and that they didn't do the bi-annual checkups on week-ends. I explained that I had determined the cause of our 4 degree difference with the thermostat was because I had not activated the separate unit for my office, yet, and that it hadn't been noticeable until the Summer heat increased. That made sense to Mike. He said that he would not charge for a regular service, week-end visit. In fact, he didn't charge me at all. Further, he initialed a week day appointment the next week to come out and do my bi-annual unit checkup. Then, as long as he was already at my home, he tightened some screws on my unit that had caused some rattling noise and changed my air conditioning filters. I think that is beyond what I would have expected for a visit that was initiated by concern that our unit was not working properly. Mike was very good. And, I would say that we have always been very satisfied with every technician that Interstate has ever provided. The owner even came out a couple of times and provided their standard quality care. When I find a person or company that I can count on, I stick with them. You can count on Interstate, and you can count on Mike.


great service




Review of Interstate Heating & Air Conditioning

Great to deal with


Great service




Review of Interstate Heating & Air Conditioning

Everything was just fine


Good




Review of Interstate Heating & Air Conditioning

Good very now person


Excellent Service; Great Price




Review of Interstate Heating & Air Conditioning

Professional, knowledgable, polite, on time.


Nice People, Great Service




Review of Interstate Heating & Air Conditioning

Austin is a nice guy and made my air conditioner cooling again.


Excellent Service




Review of Interstate Heating & Air Conditioning

Austin did a great job and kept us advised during the service.


Amazing service!




Review of Interstate Heating & Air Conditioning

Always do a great job. Fast and knowledgeable.


Emergent request




Review of Interstate Heating & Air Conditioning

Chris came out and was very kind. After hours!! Can’t say enough good about this company. They are tops. Thank you for your patience with me.


Great service by great guys




Review of Interstate Heating & Air Conditioning

Very happy


Excellent service.




Review of Interstate Heating & Air Conditioning

The reason for the visit was my almost 2 yr old system, which you installed, has had an ongoing issue with a freon leak which still has not been locatable. I was only charged for the Freon, but really think I shouldn’t have to pay for it. If it didn’t have a leak, there wouldn’t be a need to add Freon.


Great & Professional service




Review of Interstate Heating & Air Conditioning

Excellent job


The work was done quickly and efficiently




Review of Interstate Heating & Air Conditioning

I Was not happy with the increased price of the filter.


great service




Review of Interstate Heating & Air Conditioning


Great thorough service.




Review of Interstate Heating & Air Conditioning

Jason did a very complete & thorough job servicing our units.


Great service, Fabulous technician




Review of Interstate Heating & Air Conditioning

This gentleman was considerate and professional. He understood my need to clean the vents in specific rooms first so that I could move our 2 dogs and cat around. He explained the duct cleaning process and gave me tips on cleaning the dryer vent. I thoroughly enjoyed discussing San Diego with him. Highly recommend Interstate Heating and Air for all your duct cleaning needs.


Great service




Review of Interstate Heating & Air Conditioning

Great service


He was wonderful




Review of Interstate Heating & Air Conditioning


Great service!




Review of Interstate Heating & Air Conditioning


Such a pro!




Review of Interstate Heating & Air Conditioning

Love Isaac. Has been to our house at least twice. Welcome anytime! Was thorough, friendly, and explained everything in terms I could understand.


Happy customer




Review of Interstate Heating & Air Conditioning

Isaac is always professional, polite, and gets the job done. He answers our questions and knows his business


heater issue, great service from Brandon




Review of Interstate Heating & Air Conditioning

Brandon was very professional, with a smooth, engaging manner, and was very efficient and explained his work very thoroughly. His "can do" attitude was a great asset to him and his abilities.


Great service




Review of Interstate Heating & Air Conditioning

He got job done fast and great


Excellent Service




Review of Interstate Heating & Air Conditioning


Great service




Review of Interstate Heating & Air Conditioning

Great guys and service!!


Mike T.

Mike T.

On July 24, 2021 I arrive to aPrevious customer nonmember upon arrival I greeted the customer they stated that the compressor was making a hissing sound went to the condenser as the customer taken one compressor kicked one but the fan did not try to spin it off and see if it works been it was locked up recommending replacing the condenser fan motor customer said go ahead and get it done got a new one installed said the blade where it needs to be getting them drawls mount of the capacitor and tested system operations everything’s working properly at this time thank you for your business Mike T

Near Old Farm Rd, Norman, OK 73072
Mike T.

Mike T.

On July 24, 2021 I arrive to a silver club member for a no cool upon arrival agree to the customer I then went to the condensing unit and seen that the top of the compressor had been hot and it melted the paint off of it I disassemble the unit opened up the terminal boxed on the compressor and it had blown out to terminals as well as dump refrigerant customer would like a quote to get it replaced

Near Kingston Rd, Norman, OK 73071
Mike T.

Mike T.

On July 23, 2021 arrive to a silver club member for a no call upon arrival I greeted the customer they stated that the other unit wasn’t doing anything opened up the disconnect for the disconnect checked for voltage and then checked both fuses once use was bad replaced the fuses reinstalled system fired up immediately did amp drawls check components everything’s working properly at this time thank you for your business Mike T

Near Kingswood Dr, Norman, OK 73071
Kianoosh M.

Kianoosh M.

Silver club 2 system tune up. Checked filters and thermostats, and upstairs has rarely been run so filters are still fresh. Changed downstairs filters. Washed condensers thoroughly, cleaning between coils of downstairs unit. Checked contactors, capacitors and wiring as well as hard start kit in upstairs unit. Checked drain lines and evaporator coils. Cycled both systems on and checked checked super heat. Both systems running in range at this time.

Near Castlewood Dr, Norman, OK 73072
ISAAC J.

ISAAC J.

Performed preventative maintenance on AC system. Inspected the blower assembly, evaporator coil, drain and overall condition of equipment in closet. Cleaned condenser coil thoroughly. Customer stated he would change the filters. I inspected the condenser coil, compressor, capacitor, contactor, fan motor and operation of condenser. Checked amps, temperatures and pressures of condenser. System is cooling properly within manufactured specifications at this time.

Near Golden Oaks Dr, Norman, OK 73072
ISAAC J.

ISAAC J.

Performed preventative maintenance on AC system for customer. Customer stated that he already changed the filters inside. He had questions about his dryer vent coming loose after his roof was replaced and wanted to know who he needs to call to fix it. Told him I could take a look and see if I could do it for him. I checked the dryer vent and found that they replaced the dryer vent hood, but how they set it back up was incorrect and was causing the vent to not line back up properly. Told customer that the vent hood would have to be replaced, because they modified it, and made it worse. Customer will have the roofers redo it. I inspected the blower assembly, electrical components, evaporator coil, drains, and ductwork. Washed condenser coil thoroughly. Inspected the condenser coil, compressor, contactor, capacitor, fan motor and operation of condenser. Checked thermostat operation, wiring, amps, temperatures and pressures of condenser. System is cooling properly within manufactured speci

Near Finch St, Norman, OK 73071
ISAAC J.

ISAAC J.

Came out to give customer a quote for replacement of existing system. Went over a couple of options with customer that were efficient, and affordable solutions for their home. Ended up with two different estimates and also refrigerant line replacement, if needed. Will match pricing on Carrier equipment dollar for dollar with a competitor. Thank you for selecting Interstate Heat and Air for your system replacement needs! We look forward to helping you along the way.

Near Barbour St, Norman, OK 73069
ISAAC J.

ISAAC J.

Performed preventative maintenance on AC system for customer. Inspected the blower assembly, electrical components, evaporator coil, and overall condition of equipment. Cleaned filters for customer, and washed the condenser coil thoroughly. Inspected the condenser coil, compressor, capacitor, contactor, fan motor, and overall condition and operation of condenser. Checked thermostat operation, wiring, amps, temperatures and pressures of condenser. System is cooling properly within manufactured specifications at this time.

Near Elm Ave, Norman, OK 73069
Kianoosh M.

Kianoosh M.

Summer AC tune up and duct cleaning on home with 2 systems, both down flow. Inspected ductwork with video camera and found heavy debris in ducts that needs to be shop vacced out before preforming duct cleaning. Layed drop sheets where needed. Removed vents and grills and cleaned dust off them with dry spinning brush and micro fiber cloth. Shop vacced out heavy debris from all ducts and duct cleaned supplies with 2-4 passes each. Duct cleaned returns with 7 passes each. Wiped out return cavities. Vacuumed out excess debris and sprayed in hospital grade disinfectant spray. Sealed bottom of supply boots with mastic air sealant where needed. Added fresh filters to system. Preformed AC tune up on both systems, verified proper thermostat function, changed out both sets of UVV / UVC air cleaner bulbs and verified proper operation. Checked evaporator coils, blower wheels, blower capacitors and drain lines. Washed condensers. Checked condenser capacitors, contactors and tightened wiring con

Near Alexander Ct, Norman, OK 73072
Joseph K.

Joseph K.

I arrived to inspect a air conditioner system for replacement on a 1381 sq ft home. I bid a 14 seer and a 16 seer air conditioner with a 80% furnace. The indoor system has been installed behind the door frame on the left side of the door. This will not pass code with a new system installed. We will have to build a platform out to the right for the furnace to clear the door frame and pass code. We will replace the evaporator coil furnace and condenser and the system will have a 1” year parts warranty and a 1 year labor warranty. We also offer a financing at 0% for two years, 5% at 60 months, and 10%at 138 months. Or a 10% off the system equipment if it’s payed in full upon completion. If you have any questions please contact us and I will do my best to help you in anyway possible.

Near Remington Ct, Norman, OK 73072
Mike T.

Mike T.

On July 21, 2021 arrive to Blue Shield customer for a spring tuneup upon arrival agree to the customer then went to the thermostat turn the system on and checked thermostat operations and then went into the attic to the air and alert and coil did amp drawls on the blower motor checked capacitor check the coil make sure the drains were clear and then went down to the condenser checked the capacitor contactor as well as the amp drawls and check the charge Oh then disassembled the condenser washed it reassembled tested system operations everything is working properly at this time thank you for your business Mike T

Near Shadowlake Rd, Norman, OK 73071
ISAAC J.

ISAAC J.

Came out to call for a system not cooling properly. Customer stated that the unit that serves his office and part of the east side of the building was not cooling properly. Customer thinks the filters were changed 4 months ago. I checked the filters and they mostly were from 2018. I changed all the customer supplied filters. I checked out unit number 3. We changed out the TXV in this system over 3 years ago. I checked the system pressures and found it low on refrigerant. I went over options of repair vs replace. Customer wanted to charge the unit for now. I highly recommend customer think about replacement of this unit, since it’s had the majority of the issues in the building. I checked the TXV with a leak detector and didn’t find any signs of it leaking. I added 4.2lbs of R22 to the system. There are no guarantees on how long the refrigerant will last in the system, and with it being a refrigerant that has been discontinued, I do again recommend replacement.

Near 24th Ave NW, Norman, OK 73069
ISAAC J.

ISAAC J.

Requested re-quote with maintenance plan, extended labor warranty, and cash discount

Near Briarcreek, Norman, OK 73071
ISAAC J.

ISAAC J.

Came out to call for a system not cooling properly. I was out a month ago to make a repair on the AC and customer stated that it worked fine, till a couple of days ago. Customer thought that it may be the thermostat not registering the temperature properly, and that’s why it runs for so long, but after different temperature readings, we came to the conclusion that it was reading close to the actual temperature of the home. I told him I would recheck the system. I checked refrigerant pressures and found the system low on refrigerant. When I was out previously, I washed the condenser and my pressures then were just in range of where they needed to be, so it didn’t need any at that time. Went over options with customer of finding the leak and the possibility of needing to replace a component if we do find the leak. Customer is aware that the system is R22 and the refrigerant is no longer produced. Customer wanted to just charge the system for now and see if it gets him through the sum

Near Barbour St, Norman, OK 73069
ISAAC J.

ISAAC J.

Came out to call to give estimate for a full system replacement. Based of discussions I had with customer, I gave him two different options. 16 Seer Select option and a 17 Seer Deluxe option. Customer will discuss options over with significant other. I will follow up with them on Wednesday, unless contacted before then.

Near Briarcreek, Norman, OK 73071
Kianoosh M.

Kianoosh M.

Silver club AC service on home with 3 systems. Spoke with customer and new system has been cooling well. All three systems do need filters to be changed though. 1 system providing air upstairs is in the back yard and the two systems providing air downstairs are on the roof. Gained rooftop access with 24 ft ladder Off of the garage. Washed 3 condensers thoroughly, checked capacitors contacted wiring and line sets. Cleaned contactors on roof and found both rooftop unit capacitors to be out of range. Went inside and changed filters, checked blowers, evaporator coils and drain lines. Cleaned out drain line on downstairs unit on north side. Cycled systems on and checked refrigerant charge via super heat on Lennox units and got 20 degrees in north side unit and 21 degrees in south unit. Checked subcooling on carrier unit we installed in March and got 11 degrees. Checked amps and delta t. With customer permission I replaced both rooftop capacitors, and tested and verified amps and refrigerant

Near Brookhaven Blvd, Norman, OK 73072
Jason B.

Jason B.

19JUL2021 Jason B Arrived for spring tune up, and spoke with Aubry about the systems performance. Cycled system on at thermostat. Inspected coil, blower cabinet, motor and all electrical components at the furnace. Inspected pressures, capacitors, fan, and compressor. Washed out condenser coils. Cycled system back on. Found blower capacitor at 5.5 of 7.5 and refrigerant levels low. With customer permission I replaced the blower cap, and added 1 lb of refrigerant. Aubry is aware of the leak and just trying to limp the system through summer. System is running properly at this time.

Near Wood Castle St, Norman, OK 73072
ISAAC J.

ISAAC J.

Came out to call for a system not cooling properly. Customer stated that the system was running, but it wasn’t cooling like it normally should. I checked the system over and found the AC low on refrigerant. I made homeowner aware of the issue and went over options. It was starting to rain, so customer had me add refrigerant. I added 3lbs of 410a to system. System has no previous record of a refrigerant leak. Recommended that customer have a leak search done if system is low again next AC service. System is cooling properly within manufactured specifications at this time.

Near Prestwick St, Norman, OK 73072
ISAAC J.

ISAAC J.

Came out to call for a system not cooling properly. We were out recently to fix a condensation issue that the customer was having. I checked system over and found the new condensation pump we just put in wasn’t pumping water and shut the system down. I found a kink in the condensation hose attached to the pump. This was causing a restriction and not allowing the condensation pump to work properly. The pump is bad, so I replaced it under warranty. Installed new condensation pump and reran hose to where it wouldn’t kink. Tested new pump and it worked perfectly. No more issues draining. I apologized to the customer for the inconvenience. There is no charge for this call..

Near E Lindsey St, Norman, OK 73026
Joseph K.

Joseph K.

I arrived to inspect a system for replacement. I found the system to be a upflow in the hallway closet. I bid a select system replacement and a deluxe system replacement and explained the difference between both systems. Both systems will have a 10 year parts warranty and a 1 year labor warranty with a option on a 10 year labor with with a purchase of a maintenance plan.

Near Lochwood Dr, Norman, OK 73071
Joseph K.

Joseph K.

I arrived for a power issue with a thermostat. I re inspected the system and found the drain line to be sweating and the suction line to be sweating against the evaporator coil insulation. I insulated the drain line and the suction line inside the evaporator cabinet. I vacuumed all water out of the secondary drain line and made sure the drain line is not stopped up. I also blew the drain line out with nitrogen. The reason for this is the humidity and temperatures difference between the inside of the coil cabinet and the atmosphere air is causing the systems to sweat.

Near Boyd St, Norman, OK 73071
Joseph K.

Joseph K.

I arrived for a no cool call non member. I first spoke with the homeowner and found that the system just started working right before I arrived to the home. I inspected the system with the homeowner and found that the indoor and outdoor system is running properly with no issues. They have a nest thermostat that is loosing power and will not run the system. I found the furnace to have no previous fault codes. I recommended to have the thermostat replaced due to the furnace not having fault codes and the thermostat stating that it has no power. I had 26 V on the control system and 118 V coming into the furnace at this time. I recommended a test and verify on the system due to the problem being intermediate and not present at this time. The test and verify covers the diagnostic charge for 30 days regardless of what issues the system is having. The homeowner did not want the test and verify at this time. I explained that I need the system to be broken so I can trouble the system properly.

Near Boyd St, Norman, OK 73071
ISAAC J.

ISAAC J.

Came out to call for a system not cooling properly. Customer stated that the outside unit was making a weird noise and the system was blowing room temperature air. I checked system over and found the condenser out of refrigerant. System has a severe leak in it. I noticed customers roof was redone and asked them about it, and they just had it done yesterday. I checked the refrigerant line by the roof line and found a puncture in the 3/4 inch copper line. Copper line was close enough to the roof to be hit by a nail. Customer called the roofing company and wants them to cover the repair needed. Customer stated he’ll call me back out once he sorted it out with them.

Near Chambers St, Norman, OK 73071
Joseph K.

Joseph K.

I arrived for a recall on a furnace and evaporator coil that was recently installed. The main three issues were the noise was louder than the last system, the safety switch was not on the last system and the thermostat wires beside the fuse are exposed. I explained that the safety switch is a device that will help prevent water from leaking into the flow of the drain line we’re to ever stop up. I expect that the thermostat wire on the outside of the furnace is necessary and if you remember the wire the system will not run. I expect that this ire is cow the thermostats tells the furnace and condenser to turn on and operate. With the noise issue I put the fan speed to medium and low speed and we decided to leave the fan speed on medium so we can keep good air flow and keep the noises level lower.

Near Carlisle Cir, Norman, OK 73069
Joseph K.

Joseph K.

I arrived and spoke with the homeowner and they wanted to bid the outdoor system for replacement. I found a R22 only 2.5 ton York condenser at 29 years of age and a R22 only 3.0 ton York evaporator coil at 29 years of age. I made it aware to the homeowner that I can’t just replace the outdoor system due to the type of refrigerant that the system uses. I explained that I would have to at minimum replace the evaporator coil and condenser to update the system to R410A refrigerant. In order to remove the evaporator coil I will have to remove the furnace and reinstall furnace to gain access to the evaporator coil. I bid to replace the 2.5 ton condenser and 3.0 ton evaporator coil with a 3.0 ton condenser and 3.0 ton evaporator coil to have a matching system sized for a 1517 SQ FT home. I made the homeowner aware of this. I gave two options of replacing the complete system and a option of replacing the evaporator coil and condenser only with installation of the old furnace. The new equipm

Near Newbury Dr, Norman, OK 73071