Adon provides a full range of heating and air conditioning services to the residents of Denison, TX and the surrounding areas. We pride ourselves on providing expert work and outstanding customer experience!
Read our reviews and find out why your neighbors call us for all their heating and air conditioning needs in Denison, TX.
Local Reviews
for Denison, TX
Customers say: # Review Sentiment Analysis The reviews reflect an overwhelmingly positive sentiment toward the company's HVAC services. Customers consistently praise the technicians for being knowledgeable, professional, and thorough in their work. Many reviewers highlight the clear communication provided by staff, noting how well technicians explained system issues and maintenance procedures. The service quality is frequently described as "excellent" with multiple mentions of staff going "above and beyond" expectations. Customers appreciate the technicians' attention to detail, honesty, and courteous demeanor. The company appears to have built strong customer loyalty, with several reviewers mentioning they are long-term customers or would highly recommend the service to others. The overall tone is decidedly positive, with recurring themes of professionalism, reliability, helpfulness, and quality workmanship. Customers also value the maintenance programs offered and the comprehensive nature of the service visits.
Our Reviews by City
Great job
Debra - Denison, TX 75020
2nd tech to work on HVAC outage, was fixed however a bit of rainwater in the shorted the system. Quick service! Charles explained the remaining issue, which sounds as if it would have been hard to diagnose prior to the rain storm. Thank you!
INCREDIBLE TECHNICIAN!!
Laura - Denison, TX 75020
ALEX IS AMAZING! HE ARRIVED ON TIME, WAS EFFICIENT, KNOWLEDGABLE AND THOROUGH. HE WENT OUT OF HIS WAY TO PROVIDE EXCELLENT CUSTOMER SERVICE IN REPLACING DUCTS IN MY ATTIC, EXPLAINING EVERYTHING. AND EVEN HELPED ME CONTAIN THE RODENT PROBLEM THAT WAS RESPONSIBLE FOR THE PREVIOUS DUCT DAMAGE SINCE I WAS UNABLE TO CLIMB THE ATTIC LADDER MYSELF. HE WENT ABOVE AND BEYOND MY EXPECTATIONS. WHEN I HAVE ADDITIONAL DUCTWORK DONE -- HE WOULD BE MY CHOICE FOR A TECH. ALEX DESERVES A BIG RAISE!!! THANK YOU!
Great
Walton - Denison, TX 75020
5stars thank you charley
Excellent product with outstanding service
David - Denison, TX 75020
On-time and great service
Green - Denison, TX 75020
He was there 10 minutes ahead of schedule and had us back up and running very quickly!
Outstanding service
Tucker - Denison, TX 75020
I love this company. They Take great care of me
Good service. Tech was knowledgeable and helpful
Coley - Denison, TX 75020
Skylar M.
Replaced blower motor under parts warranty. Tested system after repair. Previous fault code went away and system started cooling. Condenser coil was very dirty and blocking the airflow through the coils. Cleaned condenser using water only. Return air 84° supply 65°. System is cooling at this time.
Skylar M.
No cool on single system. Getting 179 fault code at thermostat. Indoor control board was displaying E2.2 meaning blower motor is not communicating with board. Blower motor has failed and needs to be replaced. Office will order part.
Clayton P.
Upon arrival I found the outdoor unit was not running. I tested capacitor and found that capacitor was completely dead. Tested drain line drain line was clear. Air filters were clean. Replaced warranty start capacitor. Tested system. System is running properly at this time.
Clayton P.
Found that outdoor unit was not coming on because it was not getting 24 V. Upon further investigation, I found that a thermostat was bad whenever I wired wire together at the thermostat system came on. Left an estimate to replace thermostat to homeowner. Homeowner is going to hold off for now. Also found that compressor was pulling way too many amps due to condenser being extremely restricted with debris highly recommend a condenser cleaning.
Clayton P.
Upon arrival I found that system was cooling thermostat was set at 83° degrees room temperature temperature was 83°. I turned system on cooling mode and went into attic to observe system. Drains were draining drain line was not clogged and I replaced air filter. I checked return and supply temperatures return temperature was 72° supply temperature was 51°. I did put my gauges on the outdoor unit to check refrigerant levels and found that system was cooling properly with a 8° sub cool. System is cooling properly at this time.
Skylar M.
Customer had issues with system keeping up with thermostat. Thought it was the refrigerant pressures. Checked pressures and they were at a good level, 53° coil temp so it was not under charged. There is only a 15x15 grill for the return. This is not enough air and system is unable to breathe properly. The addition on the other side of the house does not have any return vents so air is stagnant and feels hot. Customer is going to try to cut another return or run a return duct to other side of house. This is preventing system from cooling the house.
Clayton P.
Upon arrival, I found that the system was running, just not efficiently. System was only cooling the air 6°. Return register was pulling in 84° air and supply register was putting out 78° air. Upon further investigation, I found that none of the air filters have been changed in a very long time and return cavities and return Plenum was very dirty. I opened up air handler and found that the evaporator coil was dirty, not allowing proper airflow across coil. Blower housing was also dirty, causing air restrictions. The outdoor condenser was very restricted with debris and needs a thorough chemical cleaning. I also noticed that the air handler was no longer level due to support coming loose and screws had pulled out. I highly recommend a full system equipment cleaning, a duct cleaning and re-leveling the air handler. It is very important to get your system cleaned so that it can run at its peak performance and efficiency. Due to airflow restrictions the system is starved of airflow and the
Clayton P.
Upon arrival I found that thermostat was blank. Thermostat did have 24 V between R and C in terminals. I checked drains drains were not clogged float. Switch was not tripped. I took thermostat off of back plate and connected R,G, and Y and system turned to cooling mode and was running properly. Homeowner opted to have thermostat replaced. I left estimate for condenser cleaning. Condenser was very dirty and as in need of a cleaning. Replaced thermostat and tested system. System is running properly at this time.
Shelby S.
Upon arrival, I discovered the outdoor unit completely empty of R22 refrigerant. I heard a hissing noise outside and found that the compressor wires had caused a hole. With it being R22, I spoke about replacement. Client opted to pay the service fee only and may reach back out in the coming days. System is an above the tub furdown unit.
Jesse V.
Need to clean up the wire with burnt up pull back clean up strip back Replacing the whip from the disconnect to the unit Scope of Work – Condensate Drain Line Cleaning Upon inspection, the condensate drain line was found to be clogged, preventing proper condensate drainage. The safety float switch is shutting the system down to protect the equipment from potential water overflow and damage, causing the outdoor condensing unit to turn off. Our service will include: • Purging the condensate drain line to remove the blockage. • Flushing the drain line thoroughly to restore proper drainage. • Verifying the condensate flows freely through the drain system. • Testing the condensate safety float switch to ensure it is operating correctly. • Running the HVAC system through a complete operational test to verify normal system operation after the drain line has been cleared. Once the condensate drain line has been properly cleaned and flushed, the system should operate normally, allowing
Jesse V.
Blower assembly pull and clean + horizontal coil cleaning + washable metal filter Here’s a professional service summary you can place in your work order: Service Summary Performed a complete cleaning and restoration of the indoor air handler due to excessive dirt and debris buildup affecting system performance. • Removed and disassembled the blower assembly. • Separated the blower wheel (squirrel cage) from the blower motor for a thorough cleaning. • Washed, sanitized, and cleaned all blower components before reassembling the assembly. • Cleaned the evaporator coil in place using a jetter and approved coil cleaning solution. The coil was heavily impacted with dirt and debris, especially throughout the center of the coil, which was significantly restricting airflow. • Thoroughly flushed the evaporator coil to remove all loosened contaminants and ensure proper drainage. • Installed a new washable air filter. After completing the cleaning, the system was tested and returned to
Jesse V.
Arrived at customer’s home to evaluate system drainage concerns. Found the condensate drain line to be clogged, preventing proper drainage. The condensate drain line is designed to remove moisture and condensation produced by the air conditioning system during operation and safely drain it away from the equipment. Cleared the drain obstruction and verified the system is now draining properly. Inspected the system and found the evaporator coil was frozen, indicating a possible refrigerant-related issue. Checked the air filter and confirmed it is not causing an airflow restriction. The system will need to fully thaw before a complete leak search can be performed. Pricing for the recommended leak search will be emailed over for customer review. Additionally, found the system is missing an SS1 float safety switch, which is recommended to help prevent potential water damage in the event of future drain issues. The SS1 switch monitors the drain system and will shut the equipment off if wat
Brayden W.
Arrived on site, found blower motor not running. Tested high voltage to motor and found 120v. Tested control voltage and found 24 being supplied to the fan. This confirms the blower control module is not working. Motor must be replaced to address this. Upon further inspection I found that the pressures were low at about 200 standing pressure. This indicates there is a leak in the system. Advised homeowner that i would have to charge them to find the leak, but 9/10 it’s in the evaporator coil and that I didn’t not see any obvious leaks outside. Advised system replacement as motor and coil cost is most of the way to a new system, and with the age of the system I can’t make any guarantees about the rest of the system if repairs were to be completed. Set up comfort advisor visit for Wednesday after 3:30. System shut off at outdoor breaker to prevent damage to the compressor.
Brayden W.
Reverified bad capacitor and found 40/45 mfd. Replaced capacitor and dated it. Photos uploaded and tested system to ensure good functionality.
Brayden W.
1. Visually inspected condenser coil for leaks and abnormalities. 2. Inspected condenser fan motor, blades and bearings. 3. Inspected, cleaned, and, tightened wiring connections. 4. Measured capacitance of compressor/fan motor capacitor. 5. Inspected and measured resistance of contactor 6. Measured compressor current draw. 7. Measured condenser fan motor amp draw. 8. Inspected and replaced return filter. 9. Inspected return plenum for dust or debris. 10. Inspected evaporator coil for cleanliness and oxidation. 11. Inspected blower motor/ blower wheel for dust and debris 12. Measured blower motor current draw. 13. Measured temperature differential from supply to return. 20 degrees measured. 14. Tested drain lines for proper drainage and treated to prevent blockages. 15. Rinsed condenser with water to promote heat exchange and reduce stress on system by removing dust and debris. Found failing capacitor no longer under warranty as of 03/00/26. Advised homeowner the capacitor that helps
Shelby S.
I returned to install a blower control board. I tested the system after to ensure proper operation. System is cooling upon departure.
Shelby S.
Upon arrival, I found the blower not turning off. Customer stated they smelled a burnt smell from the unit. I opened the unit to find a relay had burnt causing constant voltage to the blower. To fix this, we will need to get a blower control board. The part is under warranty, on order, and scheduled for 6/22 3pm to 5pm.
Brayden W.
Arrived on site, performed installation of one surge protector on outdoor disconnect. Performed installation of one in line surge protector on indoor air handler. Tested and found both surge protectors functioning as intended. Tested to ensure system was running normally and found no issues. Changed dealer code in thermostat for remote monitoring of system. System in good working order upon departure.
Brayden W.
Arrived on site found error codes for surge as well as some hard lockouts. Tested and found drain line clogged. Measured refrigerant pressures and found system to be low on refrigerant. Performed courtesy leak check and found no leaks in the system. Pervious technicians from another company replaced evaporator coil under warranty. Charged system with 2 lbs of 410a refrigerant. Unclogged drain line. System running upon departure.
Clever M.
Upon arrival customer showed me issue. Unit wasn’t cooling earlier, condenser wasn’t firing. It is now. Found emergency drain pan full of water, a lot of debris in water and throughout pan that caused a clog in the drainline. Had to hit with nitrogen and pull vacuum from outside to dislodge and free drainline. Pulled all the debris and water out of pan and verified unit wasn’t cooling earlier draining properly. I found indoor coil very dirty, metal washable filter was so dirty that unit ripped it apart trying to get air. Pics uploaded. I highly recommend a duct cleaning, coil chemical cleaning and replacing filter with new version. Estimates provided. Customer will call in for payment.
Shelby S.
Upon arrival, I discovered a 2024 R32 heat pump system sweating in the attic. I determined that the primary drain line was clogged at the Ptrap with bacterial zoogloea. I thoroughly cleared it out and flushed the drain afterwards to ensure it was fully functional again. I noticed that the secondary drain is not designed correctly. This resulted is the system sucking air into the secondary forming an air wall. The end result is the system throwing water into the cabinet insulation. This cooled the exterior of the system making condensation. The system will need to dry out before the condensation will go away. The system is draining and cooling on departure.
Matthew C.
Found issues with the pitch of the unit. Client stated he will have the company that installed it come re hang it.
Brayden W.
Performed dryer vent cleaning. Initially had the wrong vent and realized before I got the vent apart completely. Found dryer vent on roof entirely blocked up with lint. Showed homeowner pictures and everything I managed to pull out of the vent.
Shelby S.
Upon arrival, I found the system off and the indoor unit with all the doors off. I installed my short finder tool and began testing. I unwired the wire going to the outdoor unit and tested the system. The cooling would come on. I hooked the wire back up and tested again. The system would reset due to a short. I went outside and unwired the outdoor unit and tested again. The system reset again. With the information gather from a simple isolation test, I determined that the wire going from the indoor unit to the outdoor unit is shorted and needs replacement. Customer declined repairs during service.
Shelby S.
Performed maintenance on a 3 head mini split unit. It is determined that all 3 refrigerant cycles may have a leak. We will reach out on scheduling to return and check charge. Due to the weather, it was not doable during the visit. I washed all of the filters during the visit. 6/1/2026 I returned to look into the cooling issue for the mini split again. The weather this visit was more ideal. I started by hooking my gauges up to the living room refrigerant line. The pressure was at 93psig. I began adding refrigerant to it and got it to 130psig. This took right at 1 pound of 410a. I tested the supply air on all of the indoor heads. The living room is now producing 52 degree air, the infants room is producing 55, and the other room is producing 55. I have no additional concerns after adding the refrigerant to the living room unit. The odd readings on the other two must have been due to the weather. System is cooling upon departure. The living room unit was low on R410a
