For your home
AC and heating repair, replacement and maintenance for homes across metro Atlanta and the I-75 south corridor. We diagnose it ourselves and tell you what the system actually needs.
Repair or replace
We check the system thoroughly, explain what we find in plain language, and fix what’s actually broken — not what’s easiest to sell.
Most repairs are smaller than homeowners expect. We show you what we find, walk you through what it means, and get it fixed — often faster and cheaper than you were braced for.
If your system really does need to be replaced, we’ll tell you that too, and walk you through the options. Either way, you’ll know exactly what you’re paying for and why.
What actually goes wrong
None of this is exotic. It’s just the stuff that’s easier to sell around than to explain.
The usual suspects are a short list: a failed run capacitor, a contactor that won’t pull in, a condenser coil packed with cottonwood and grass clippings, a clogged drain line tripping the float switch, or a refrigerant charge that’s low because it leaked out somewhere. At the thermostat they all look identical — the house is hot. They are not remotely the same repair, and they are nowhere near the same money. That gap is the entire argument for diagnosing before quoting.
Georgia winters are short, which is exactly why heating faults hide. A furnace that ran fine in November has spent eight months being asked for nothing, and then gets asked for everything on the first cold night. Ignition, the flame sensor, a cracked or dirty burner, the reversing valve on a heat pump, the auxiliary strips that kick in when it’s coldest — all of it sat idle through the summer.
Sometimes a unit really is finished, and stringing it along costs more than replacing it. We install new systems too — efficiently, and at a fair price. The point isn’t that replacement is always wrong. It’s that you get told which of the two you’re actually looking at.
Reviews
Real reviews from Google, word for word.
McGrath Mechanical is my go to choice for HVAC repairs and installation. As a property manager of properties all over the Atlanta area, I need a reliable HVAC source that will show up, diagnose the problem correctly, tell me the truth and make the repair at a reasonable cost. McGrath does exactly that! New system installations are efficient and affordable as well. I highly recommend James at McGrath Mechanical!
If he says he will be there then he will. James is fast, reliable, and gets the job done. I thought I needed a new unit but that wasn’t the problem. After about 30 minutes he had us up and running again. Any questions I had he was able to give me an answer. Highly recommend
I’ve been using James for 20+yrs they have always fit me in there schedule never waited 3or 4 days really knowledgeable friendly service is great very well priced explains what’s going on shows you the parts he replaced makes you feel like they really care about your business 5 stars all the way
Questions
No. We diagnose first, every time, and repair whenever a repair is the honest answer. You’ll never be pushed into a new system you don’t actually need.
Yes — that’s a call we get often. Before we agree a system is done, we want to see it for ourselves. Sometimes it really is time to replace it, but it’s surprising how often there’s still a real fix on the table.
It depends on the day and where you’re located, but we move fast. Call and we’ll give you an honest timeframe — not a runaround.
Residential repair, replacement and maintenance for homes across metro Atlanta and the I-75 south corridor.