Rockville, MD Air Conditioning, Heating and Plumbing Services

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Rockville, MD Air Conditioning, Heating and Plumbing Services

Supreme Air provides Air Conditioning, Heating and Plumbing Services, Repair, Installation, Maintenance, and Tune Up in Rockville, MD and surrounding areas.

Check out what some of our customers are saying about Supreme Air.

Local Reviews
for Rockville, MD

Supreme Air Rated 4.9 out of 5 stars based on 8 customer reviews

Map of Rockville, MD

geothermal check




Review of Supreme Air

Youssef is great, very knowledgable, exercises great diligence and foresight with his work.


Map of Rockville, MD

Great Service




Review of Supreme Air

Colin was very knowledgeable, diagnosed the problem. Also is making Supreme Air management aware that new units installed during the winter should have courtesy coolant level check prior to the warm weather.


Map of Rockville, MD

Technician was fabulous but...




Review of Supreme Air

Technician ran through several tests and diagnostics but our problem is not solved. Outside temperatures were in the low 80s today and our AC system could not cool the house or reduce the humidity in the afternoon hours. Thermostat was set for 72, temps got up to 77 inside the house. I need this brand new unit to cool my house asap. Thanks Bill and Sharon Harper Friday May 31st


Map of Rockville, MD

Good Service!




Review of Supreme Air

I like the notices you send by text and email with the picture of who is coming. I also like that the service representative calls and lets you know how soon he will arrive. Yonas is very professional.


Map of Rockville, MD

Great service!




Review of Supreme Air


Response from Supreme Air:

Liu, thank you for submitting this review. We are thrilled we have provided you with such great service. We hope to continue this trend during our next visit to your home for all of your future HVAC & Plumbing needs. Have a supreme day!


Map of Rockville, MD

Tuning up




Review of Supreme Air

Good job


Response from Supreme Air:

Barry, thank you so much for taking the time to provide us this feedback. We're thrilled we did such a good job for you. We can't wait for our visit in the fall to tune up the heating system. Have a supreme day!


Map of Rockville, MD

Great Timely Service




Review of Supreme Air

Service within 3 hours from placing the call. Tech was fast and thorough. Really knows his trade.


Map of Rockville, MD

Very Professional, great service.




Review of Supreme Air

Very well trained personnel and very clean. May be best o maintain in contact with the homeowner on arrival time. We had the 8-12 slot and personnel arrived after 1PM. Why is the humidifier not part of the service specially since it was installed by supreme air.


Joseph.Wade@supremeairllc.com

Joseph.Wade@supremeairllc.com

Set shower pan

Near Atwell Rd, Rockville, MD 20854
Joseph.Wade@supremeairllc.com

Joseph.Wade@supremeairllc.com

Set mortar base for shower need to return to set shower pan liner tomorrow with material 6’x6’

Near Atwell Rd, Rockville, MD 20854
Joseph.Wade@supremeairllc.com

Joseph.Wade@supremeairllc.com

Changed out diverter for master bath moved drain line for vanity replaced angle stops in bathroom moved shower drain line

Near Atwell Rd, Rockville, MD 20854
Joseph.Wade@supremeairllc.com

Joseph.Wade@supremeairllc.com

Ran lines for hose bibs,tested and found gas leak on 1 1/2 gas line ,repaired leak hooked up lav in new bathroom

Near Atwell Rd, Rockville, MD 20854
Joseph.Wade@supremeairllc.com

Joseph.Wade@supremeairllc.com

Installed 50 gal power vent water heater tested all working properly nothing is leaking

Near Atwell Rd, Rockville, MD 20854
Youssef  D.

Youssef D.

On arrival found thermostat off the wall .re mounted it on the wall .unit operating normal

Near Pettit Way, Rockville, MD 20854
Colin T.

Colin T.

Replaced remaining 3 thermostats. Had to run to Carrier to pick up COR thermostats. We also installed humidistat for steam humidifier. Once all thermostats were wired we connected them to app for customer then tested each unit individually and in all stages. Units operating normal at this time.

Near Kingsgate Rd, Rockville, MD 20854
Joseph.Wade@supremeairllc.com

Joseph.Wade@supremeairllc.com

Cut out copper pipe and replace with cpvc

Near Atwell Rd, Rockville, MD 20854
Youssef  D.

Youssef D.

On arrival found system short cycling on on drain .cleaned drain line .tested it .unit operating normal at this time

Near Loch Edin Ct, Rockville, MD 20854
Colin T.

Colin T.

Upon arrival I helped installers setup flow valves. I also installed thermostat and ran all wiring for new geo system. Once connected I returned power to system and programmed thermostat. I showed customer how to setup app and use thermostat and app on phone. I then tested ac on both stages and checked operation of flow valves. Measured delta air temps and loop flow rate, heat extraction. Unit is operating normal. Customer has 3 other thermostats that need to be installed. I spoke to customer about returning another day because it will most likely take 5-6 hours to replace them, we have to rewire Control boards and relay circuits because thermostats originally couldn’t be used for dual fuel. Finally I spoke to customer about steam humidifier on new geo system. We need a Humidistat to Control humidifier because we do not have enough wires going to thermostat.

Near Kingsgate Rd, Rockville, MD 20854
Yonas M.

Yonas M.

Spring Pm On 07/31/19 On arrival set units to call for cooling measured supply and return air temp measured voltage and amps inspected electrical connections checked drain and cleaned checked air filter recommended air filter needs to be replaced customer has only one I suggested to replace it now to avoid future problems I gave quote customer accepted replaced 2 Aprilaire air filter model #413 checked EWP and LWP and temp It was low I pump it up to 55/50 psi checked compressor capacitor checked all other electrical connections in unit tested unit operating normal at this time. Collected $127.50 on C.C

Near Alloway Dr, Rockville, MD 20854
Youssef  D.

Youssef D.

On arrival Removed defective blower motor and cap .i then installed new motor and cap .tested unit operation.checked charge and delta t .unit operating normal.customer paid remaining balance.

Near Beall Ave, Rockville, MD 20850
Colin T.

Colin T.

Upon arrival we found system calling for ac at Zone Panel but Condenser not. Went to AHU to find Zone Panel locked system out. Fan not running in AHU and I found only lockout fault that shuts blower off is blower rpm fault. Found filter very dirty, also found multiple filters inline. Explained to customer only 1 filter in the system at a time and it needs to be replaced more periodically. Tested system and found no additional issues. Unit operating normal.

Near S Glen Rd, Rockville, MD 20854
Christopher A.

Christopher A.

I checked the air filters for each unit. They were still very clean. I cleaned the condensate pans and drain lines and ran hot water to flush the debris and to check for leaks and proper drainage. I operated each unit on cooling mode and recorded 18-22 degree delta temperatures across the evaporator coils. I checked the electrical wiring and electrical systems, all are within specification on the Trane heat pump and all are within specification on the Lennox system, except for the dual run capacitor. I replaced it and took a picture of the old one. Both units are operating normal with no refrigerant issues detected. Replace voltage absorption system for the Lennox condenser.

Near Flowerfield Way, Rockville, MD 20854
Youssef  D.

Youssef D.

On arrival found bad indoor fan motor and bad cap .need to replace cap and fan motor .unit is not operating normal

Near Beall Ave, Rockville, MD 20850
Christopher A.

Christopher A.

I pumped the system down and replaced the txv. I vacuumed the lineset to <500 micron vacuum and opened the service valves. I let unit operate for about 10 minutes and then added 14oz of refrigerant to increase suction pressure while maintaining normal subcooling, all the while keeping 20+ degree delta temperatures across the evaporator coil. Unit operating normal.

Near Cherry Valley Dr, Rockville, MD 20853
Christopher A.

Christopher A.

Secure loose blower cabinet insulation. Blower bottom cabinet insulation had pulled into the blower wheel making an undesirable noise and reducing airflow which disturbed operation. I used clear silicone to glue the pulled up silver lining back to the yellow insulation. I used UL tape liberally but neatly to secure the edges. I also put a bead of silicone on the edges in places I could not reach to tape. I did decrease airflow using the dip switch package. After it was fixed I operated the unit and checked delta temperatures across the evaporator coil. I then opened the cabinet to make sure everything was still secured. Unit operating normal.

Near Thomas St, Rockville, MD 20850
Christopher A.

Christopher A.

Upon my arrival in the daylight I was able to visually see refrigerant bubbles at one of the suction lines braze joints. I circled it with marker and took a photo of it. I then removed the refrigerant and liquid line filter drier indoors. I replaced filter drier and fixed the joint. I used dry nitrogen to 250psi to pressure test the system. I then flushed the lineset from high side to low side and pulled it into a <500 micron vacuum. I charged with new refrigerant to factory specification. I had 8 degrees superheat and 10 degrees subcooling and 20-22 degree delta temperatures across the evaporator coil. Unit operating normal. Customers mother was home but Angela was not. I could not get in touch with them to process payment of the balance. I will let the office staff know. I got the mother’s signature to show work was completed.

Near Glenmore Terrace, Rockville, MD 20850
Christopher A.

Christopher A.

Upon my arrival I turned ac unit on, coil had thawed out. There was very little delta temperature across the evaporator coil, blower operating normal. I went to the condenser and suction pressure was well below freezing using pt chart. I noticed the suction line insulation was saturated in refrigerant oil in an isolated area. I slit the insulation and found a braze joint underneath covered with refrigerant oil. I explained to the customer what needs to happen to fix the unit. Customer obviously disappointed because the unit is not very old. I gave customer estimate for advanced leak repair up to 6lbs. Customer to call a CSR to ask if any discounts apply. Customer paid the dispatch fee yesterday so there is no fee for the return visit.

Near Glenmore Terrace, Rockville, MD 20850
Youssef  D.

Youssef D.

Upon arrival found filter had been removed by customer, fan running and coil frozen. Customer said they had cut the system off overnight but were running it today. Customer showed me filter from trash, filter dirty, possibly restricting air flow but unable to diagnose due to frozen coil.

Near Glenmore Terrace, Rockville, MD 20850
Christopher A.

Christopher A.

I pressurized the ground loop to between 55-65 psi. I let it settle and pumped up a few more times so it should maintain a decent pressure for a longer period of time. The pressures always drop after pumping up the loop for a period of time. I removed the flush port cap on the older flow center and applied Teflon thread sealant and tightened it back in place. In regards to Trane unit, I too heard the pump relay contactor chattering. I noticed the primary voltage on the transformer was on 208. I measured actual line voltage and it was 240. I turned the power off and switched the wire terminals. I restored power and both the pump relay and compressor contactor operate as intended. I called the installation manager and was told to diagnose the Trane unit while on site and if it needed parts then there would be a charge, otherwise it was done as part of the other warranty work.

Near Woodsend Ct, Rockville, MD 20854
Colin T.

Colin T.

Upon arrival I met Ricardo and he showed me to systems and showed me how old unit was wired. Packaged unit in basement has relays already, just needed to connected low voltage wires to contactor for relay. Turned on power to unit and tested packaged unit alone, pumps came on and started running. Shut off packaged unit and ran split. Pumps came on and are operating normal. Then I called for both units to run and pumps stayed on. Units operating normal.

Near Woodsend Ct, Rockville, MD 20854
Colin T.

Colin T.

Upon arrival I went to thermostat and found unit calling for 68, currently 74. During diagnostics I went to condenser and put gauges on. Found high Superheat and high subcooling, low suction and high discharge, low delta air temp at Evap. Added a few ounces of refrigerant and discharge shot straight up. Then I went to sensing bulb and put it in ice water then hit water, no adjustment to pressures. TXV needs to be replaced. Informed customer, who is in Hawaii and they asked me to ask the office if the unit will be replaced since this is the 4th service visit and it’s still not fixed. Office please follow up with customer on part and warranty info. Joe asked if we could contact him with eta of part, he said if he doesn’t answer please leave message.

Near Cherry Valley Dr, Rockville, MD 20853
Colin T.

Colin T.

Upon arrival I was told there may be possible problem with compressor on Carrier RTU we installed last year. During diagnostics I opened up panels and checked voltage and ohms of compressor. Found normal ohms and no blown fuses, proper high voltage. Called for ac and found compressor not moving any refrigerant, grinding. Swapped L1 and L2 and restarted unit to find compressor now working, but unit shut off on high pressure almost Immediately. Put gauges on system and found unit is heating instead of cooling. AX38 belt also worn and doesn’t have much tension. Replaced AX38 belt with truck stocked A38. Tested operation and we have normal airflow. Reprogrammed Thermostat for Conventional instead of HeatPump per installation manual. Reset system and called for ac. Unit now operating normally. Measured voltage and amperage of compressor, od fan, and blower. Refrigerant pressures normal. Measured delta air temps at both coils. Found no additional problems.

Near Muncaster Mill Rd, Rockville, MD 20853
Colin T.

Colin T.

Upon arrival I was told main floor system wasn’t working at all. During diagnostics I went to furnace first and found led flashing 24, secondary voltage fuse open. Removed panel to find fuse blown. Replaced with new and returned power to system. Unit came on naturally and started cooling. Checked all parameters and found everything to be working normally. It was unclear who would be paying for service today so I called Alex and he asked for me to bill Alan, then he would bill customer. I spoke to customer about charges and they wanted to replace the fuse themselves. They gave me check for service and diagnostic fees.

Near Beall Ave, Rockville, MD 20850