9800 Old Dogwood Rd.
Roswell, GA 30075
(770) 667-6937

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Local Reviews

Rated 4.9 out of 5 stars based on 26509 customer reviews

Great service!

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Austin did an amazing job

Austin is a very impressive young man. He makes me feel better about the future.

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Excellent service.

I cannot say enough great things about Andrew and everything he did for me. From trouble shooting to staying late to ensure the job was done correctly and even just going the extra mile to explain everything. Also a shout out to the guys that came in and helped him. Both were still learning, but he was a patient teacher through it all. Highly recommended.

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Excellent service!

Joshua was excellent and extremely professional. He had to cut a hole in the drywall to access the plumbing but everything was put back together neatly when he was finished, even the books on the bookshelf. Above and beyond.

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Great service!

Installed a generator

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Highly recommend

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Great price and great service!

Max did a really great job explaining things and completed the job in a timely manner the day before an anticipated snow/ice storm and on a Friday.

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Great job

Yael is great! Knowledgeable, personable, and efficient. Highly recommended.

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Another great service with Liam

I hate to sound redundant but Liam just keeps impressing us. An innovative, independent thinker he can come up with correct solutions to my requests. It's refreshing to see. Please don't lose him. Also, Caleb is well on his way also, he could not done any better that being pared with Liam. I can't thank you guys enough for the help we have received during this kitchen reno project. Having excellent, reliable people that I can count on is so helpful as 20 year old home renovation is rather stressful. Thanks again

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Excellent service

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Great and excellent service

Excellent service from start to finish! Wayne the electrician was punctual, knowledgeable, and very thorough. The work was done quickly and to a high standard, and the pricing was fair. It’s hard to find reliable tradespeople, but this one is a keeper. Highly recommended!

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Excellent Service

Augustine is the best amongst the best!

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Excellent Service!

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Great Service

Koi and Enrique are very knowledgeable and professional. Our service experience was excellent. Thank you.

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Excellent & Dependable Service

Austin Newman is a trustworthy plumber. During the coldest days this winter, our water heater broke down and we only had bone chilling cold water. Austin took care of calling Rheem to order the needed parts. He prioritized us in his schedule and when the needed part arrived at their company, he promptly installed it the following morning. Now we have hot water again! I highly recommend TE Certified for reliable plumbing and HVAC repairs.

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Job Locations

Travis S.

Travis S. Job Checkin

Replaced washing machine supply lines. Ran the washer through a rinse and spin cycle. Tested with. O leaks or failures at time of service.


Jonah D.

Jonah D. Job Checkin

Customer was getting errors on their nest thermostat that the system was dropping temperature despite calling for heat. Found that the upstairs level thermostat was a heat pump unit with an air handler and this thermostat was set to dual fuel. I reset this to a single fuel system and ensure that the unit is turning on properly. This setting was not allowing the outdoor unit to come on with auxiliary heat. No other failures at this time. Customer signed up for our maintenance plan.


Shane M.

Shane M. Job Checkin

Arrived for zoning issues. System has 2 systems and 3 thermostats. Downstairs has its own system. And the main floor and upstairs are zoned a serrated system. Top floor thermostat wouldn’t respond to any calls for heat and main floor thermostat would over heat the upstairs and wouldn’t sufficiently heat the main floor. We discovered the thermostat upstairs had bent pins. Not sending call for heat to zone board and the zone damper for the upstairs was disconnected and was always open. Sendingnprimary airflow upstairs. We also discovered gas pressure very high, along with dirty blower wheels, undersized duct work and a semi dirty air filter causing the system to occasionally trip high limit. Gas pressure was adjusted, zoning was restored and thermostats are both responsive and operational again. System has a breached heat exchanger and is 20 years old and approaching failure. We discussed long term solutions and she said she will start to think about the long term solutions after the upc


Andrew L.

Andrew L. Job Checkin

For this job, we completed a troubleshoot for a dishwasher they was tripping and remade the connections.


Demarco H.

Demarco H. Job Checkin

Our client reached out to us in reference to having water staining on the basement ceiling. It is unknown how long they’ve been there, but they are not wet and could be from a pre-is this an issue that was resolved some time ago. I’ve instructed the customer to constantly run water in the kitchen sink throughout the weekend to see if she developed a wet spot. A follow up call will be conducted on Tuesday.


Henry H.

Henry H. Job Checkin

Troubleshoot electrical issue. ISSUE: GFCI tripping, infratech heater tripping LOCATION: basement, porch FINDINGS: GFCI controlled outdoor outlets that had a cord and plug connected and buried under ground, moisture causing GFCI to trip. 30 ampInfratech heater installed on 20 amp breaker and is connected to a 20 amp switch. It is wired directly from panel to switch and from switch to heater with no contactor. RESOLUTION:unplugged buried cord and landscaper is redoing the landscaping properly. Left estimate to install contactor, replace breaker, and re-run switch legs


Gabriel B.

Gabriel B. Job Checkin

I was called out to Poornima’s house for a noise/heating issue. Poornima has lived here for about 10 years so we performed a thorough evaluation. During the evaluation we discovered that they have a system from 2014 that is single stage and zoned to all 3 floors, the zoning with a single stage system is a poor application which causes excessive wear and tear, the gas valve has failed, the run capacitor has failed, the bypass damper is broken, a zone motor is broken with another partially working, the flood protection is minimal and needs updating, the wheel needs cleaned, the blower motor is very loud on start up, the drain line isn’t supported and needs to be insulated, the airflow on the system is inadequate, there is biological growth on the coil which was replaced in 2022, and the heat exchanger has significant rust with a lot of water stains. It is recommended we verify the sizing of the system so we can ensure we perform repairs. Due to the poor installation, cost of potential re


Mark  H.

Mark H. Job Checkin

Performed diagnostic on 20yr trane heat pump, upon arrival customer explained he had a company out during spring and added refrigerant, stated unit is short cycling now, inspected outdoor unit and hooked up gauges, next inspected air handler in basement, blower wheel impacted, checked filter, evap coil heavily rusted and can see signs of oil, checked tstst, cycled to heat mode, checked heat strips amps, upon checking outdoor unit , unit is short cycling every 20sec, suction pulling down to vacuum, explained to customer unit have a failed outdoor txv as well as possible leak dew to oil on evap coil, explained r22 is obsolete as of 1/1/2020, highly recommend install supervisor, customer approved, schedule for today, customer only has aux heat at the moment, spoke with customer about home care as well as indoor air quality


Kyle B.

Kyle B. Job Checkin

Install inlet for generator


Jansen D.

Jansen D. Job Checkin

Replace bad breaker


John M.

John M. Job Checkin

Troubleshoot and repairs


Jonah D.

Jonah D. Job Checkin

Compromised heat exchanger! Customer was informed it is not safe to run. Based on our findings today, it might be time to think about getting a brand new system.


Travis S.

Travis S. Job Checkin

Replaced garbage disposal, tested with no leaks or failures at time of service.


Jason B.

Jason B. Job Checkin

Found loose connection inside of air handler for red wire. Reconnected and tested system running well at this time. Suggested a full maintenance but due to storm coming today maintenance will be scheduled for later. Signed up for 3 system home care plan


Erik H.

Erik H. Job Checkin

Replace older fill valve & flapper parts Customer was experiencing a slow filling toilet and intermittent backups in toilet. We tested house for mainline blockage but we saw no signs of system backing up. Backups were coming from failing flapper closing too soon not allowing a strong flush to go through toilet. Replaced toilet fill valve and flapper. Test and flushed multiple times. Tested for leaks. Clearing successful.