Commercial HVAC Repair in Dayton, TX
Commercial HVAC is Jason’s core trade — the work he’s built Green Mechanical around. Heating and air conditioning is where the trade started for him, and it’s still the backbone of what he does for restaurants, offices, and shops across Southeast Texas.
In a restaurant, the air conditioning does more than keep people comfortable — it keeps them in the building. A hot dining room drives customers out before they finish the meal, and a hot kitchen stacked on top of a hot dining room drives the staff out too. The same is true in an office or a shop: when the air stops cooling, the people inside stop wanting to be there, and the work slows with them.
When the air quits, the problem isn’t just temperature. It’s lost tables, shortened service, and a harder day for everyone in the building. That’s why a cooling failure is a call-don’t-wait problem — every hour it runs warm is an hour of business you don’t get back.
Most commercial cooling failures come down to the refrigeration loop and the electrical controls that run it. A compressor pumps refrigerant, a condenser rejects heat outside, an evaporator coil absorbs heat from the returned air, and a fan moves the conditioned air back through the space. A thermostat decides when to call for cooling, and a set of electrical controls — capacitors and contactors — switch the heavy loads on and off. When any of those slips, the air stops cooling, or the unit stops running at all. Jason works the electrical and the refrigeration side together to find what actually took the unit down, rather than guessing at parts.
Air Conditioning Problems We Fix
- Not cooling
The unit runs but the air coming off the supply isn't cold.
- Blowing warm air
Air moves through the registers but it's warm, not conditioned — the refrigeration loop or controls aren't doing their job.
- Capacitors
A weakened or failed capacitor keeps the compressor or fan motor from getting the starting kick it needs.
- Contactors
A pitted or stuck contactor won't close to switch the heavy loads the compressor and fan require.
- Compressors
A compressor that won't start, short-cycles, or has lost the capacity to keep up with the space.
- Refrigerant leaks
A low charge from a slow leak drops the coil temperature until the unit can't pull heat out of the air.
- Frozen coils
Ice building on the indoor coil — usually a low charge or restricted airflow choking the coil.
- Condensate drain problems
A clogged condensate drain backs up, leaks water, and can trip a safety that shuts the unit down.
- Thermostats
A thermostat that won't call for cooling, calls when it shouldn't, or has drifted off setpoint.
- Weak airflow
Weak or uneven delivery from a fan, a filter, or a duct issue that chokes the supply.
Heating Problems We Fix
Heating calls are fewer than cooling calls in Southeast Texas, but a cold morning still shuts a dining room or an office down fast. Jason works on the heating side with the same approach — diagnose the actual failure before recommending a part.
- No heat
The unit runs but the air coming off the supply never warms up.
- Ignition problems
A pilot, igniter, or flame sensor that won't establish or hold the burner flame.
- Thermostats
A thermostat that won't call for heat, or calls when it shouldn't.
- Airflow
Weak or uneven delivery of the heated air through the space.
Rooftop Units and Split Systems
The two most common commercial setups Jason works on are packaged rooftop units and split systems.
A packaged rooftop unit puts the whole refrigeration loop — compressor, condenser, evaporator, and fan — in one cabinet up on the roof, pushing conditioned air down through the ducts. Restaurants and small commercial buildings lean on these because one unit handles the whole space, which also means one failure takes the whole space warm.
A split system separates the pieces: a condenser outside and an air handler with the evaporator coil inside, connected by refrigerant lines. Split systems show up in offices, shops, and kitchens where the equipment has to be split between the building and the roof or ground.
Both come down to the same refrigeration loop and the same set of controls, so the diagnosis runs the same way — find where the heat stopped moving and why.
Repair or Replace? A Straight Answer
When Jason opens up a unit, he doesn’t push one answer. He tells you what he found, what failed, and why — then lays out the honest options on repair versus replace, and lets you decide what makes sense for your business.
Sometimes the fix is small — a capacitor, a contactor, or a coil cleaning — and the unit is back to cooling. Sometimes a unit has reached the point where a repair would only hold for a season and the smarter money is on replacing it. Jason’s job is to give you the straight information so you can make that call yourself, in plain language, with no pressure — because you’re talking to the owner, not a salesperson working on a commission.
HVAC and Your Kitchen Equipment
One of the advantages of working with an owner-operated contractor is that Jason can cover the whole building. The rooftop unit that keeps the dining room cool and the walk-in that keeps the food cold run on the same kind of refrigeration loop — a compressor, a condenser, an evaporator, and a fan moving heat from one place to another. The same trade that diagnoses a stuck contactor on a rooftop unit diagnoses an iced evaporator on a walk-in.
That means one call, one technician, and one owner who already knows your building when the next piece of equipment goes down. Jason keeps the air conditioning running and the kitchen cold — from the rooftop unit to the walk-in.
Try the Commercial AC Troubleshooter
Before you call, answer three quick questions about what your AC is doing. You’ll get the likely causes and the safe checks you can do yourself — no contact info required.
What's happening with your AC?
Frequently Asked Questions
Warm air from a running fan usually means the air-handling side is fine but the refrigeration side isn't doing its job — a low charge from a leak, a compressor that's lost capacity, or a contactor that isn't closing. Jason checks the refrigeration loop and the controls together to find where the cooling stopped.
AC or Equipment Down? Tell Jason What’s Going On.
Fastest way: call (832) 876-3440