AC Repair
Weak cooling, a unit that trips the breaker, or one that runs all day. We find the actual fault and quote it before any work.
Fix my ACPlumber & AC Repair in Schertz, TX
Schertz Plumbing and HVAC, Done Right the First Time
From the established neighborhoods near Randolph to the newer builds off I-35, Radiant’s licensed technicians handle Schertz plumbing, cooling and heating with the price approved before we start.
Service Area
Schertz, TX
Region
San Antonio & the Hill Country
Plumbing, Cooling and Heating for Schertz Homes
Schertz stretches along I-35 and FM 78 on the northeast side of the San Antonio area, spilling across Guadalupe County into corners of Bexar and Comal. It grew up around Joint Base San Antonio-Randolph, so the older neighborhoods date from the 1970s and 80s and were built for the families stationed there. The newer sections along the interstate are slab-on-grade subdivisions from the last two decades. Both sit on blackland clay, and both drink the same very hard water as the rest of the region.
Radiant has served San Antonio since 1999, and Schertz is a core part of our northeast territory. Schmidt Mechanical of San Antonio is now part of Radiant, so former Schmidt customers in Schertz are covered by the same team. The calls we take here most often are air conditioners that give out in the first real heat of June, water heaters that have quietly scaled up for a decade, sewer lines cracked by clay movement, and drains in older homes that back up after heavy rain.
Every visit is a licensed, background-checked technician who explains the problem plainly and gives you a written price before starting. That quote is honored for 72 hours with no hidden fees. If a repair is the smart move, we make it. If the equipment is at the end of its life, we show you replacement numbers and financing options and let you decide without pressure.
- Clay-soil aware We check for foundation-related leaks and sewer offsets before assuming a simple clog.
- Schmidt Mechanical customers Same area, same commitment, now with Radiant’s 24/7 coverage and guarantee.
- Price first, always You approve the number before a single part comes off the truck.
Services We Provide in Schertz
The full range of home plumbing and HVAC work, from a running toilet to a complete system replacement.
AC Maintenance
A pre-summer tune-up catches the failing capacitor and dirty coil before they leave you without cooling in July.
Book a tune-upPlumbers
Faucets, toilets, water lines, gas lines and repipes for Schertz homes of every age, all with upfront pricing.
Schertz plumbersDrain Cleaning
Recurring backups in Schertz often trace to a shifted sewer line. We clear it, then camera the line so you know the truth.
Clear the drainWater Heater Replacement
When the tank is rusting through or the element has burned out for the last time, we replace it cleanly and haul the old one away.
Replacement optionsWater Softeners
Guadalupe County water is very hard. A softener is the cheapest way to make every other appliance last longer.
Softener installFurnace Repair
Gas furnaces in older Schertz homes need a safety check with every repair. We do both before the first cold front.
Heating helpDuct Cleaning
Decades of dust in original ductwork. Cleaning and sealing improves airflow and cuts what the AC has to work against.
Clean the ductsLocal Knowledge
The Schertz Conditions We Plan Around
Blackland clay. The dark soil under Schertz swells in a wet spring and shrinks hard in August. Foundations flex, and the sewer and water lines running through and under them crack or pull apart at the joints. If drains slow down all over the house after rain, or you see a soggy patch in the yard during a drought, the line is talking to you. A camera inspection shows exactly what is going on before anyone digs.
Two eras of housing. The neighborhoods built for Randolph families in the 70s and 80s have original galvanized supply lines, cast iron drains and ductwork that has never been sealed. The newer I-35 subdivisions have PEX and modern equipment, but builder-grade water heaters and condensers that begin failing around year ten. We know what to look for in each.
Hard water. Scale shortens the life of water heaters, clogs aerators and leaves the crust on shower glass. A softener and an annual heater flush are the two most cost-effective plumbing investments in Schertz.
Long cooling season. Air conditioners here run hard from April through October. Leaky attic ducts and undersized returns are the usual reasons a system cannot keep up, and both are cheaper to fix than a bigger unit.
Freeze prep. February 2021 burst attic water heaters and exposed lines across Schertz. Insulation and a shutoff valve you can reach in the dark are worth an afternoon.
Schertz and the I-35 Northeast Corridor
Schertz, Cibolo, Universal City and Converse are all part of our everyday San Antonio routes.
Current Specials
Save on the work your home needs most.
San Antonio
HVAC
25% Off Select Air Purifiers & Filters
Expires 12/31/2026
San Antonio
HVAC
Up To $2,500 OFF Full HVAC System!
Expires 12/31/2026
San Antonio
HVAC
Buy a Complete HVAC System, Get a Furnace FREE!
Expires 12/31/2026
San Antonio
HVAC
Last Chance HVAC Tune-up $68
Expires 12/31/2026
San Antonio
Plumbing
Up to $300 Off Smart Water Shut Off Install
Expires 12/31/2026
Both Locations
HVAC
Up to $200 off Duct Cleaning
Expires 12/31/2026
Nearby Service Areas
Frequently Asked Questions
Our Schertz neighborhood was built in the 1980s on clay. What plumbing problems show up?
The two big ones are the supply lines and the sewer. Galvanized steel supply pipe from that era rusts shut from the inside, so pressure drops year over year and water runs brown after a trip. Under the slab and out in the yard, decades of clay movement crack cast iron and clay sewer lines or separate them at the joints, which shows up as slow drains throughout the house and backups after rain. Neither is an emergency today, but both get more expensive the longer they wait. We start with a pressure test and a camera inspection and show you what we find before recommending anything.
What does an AC tune-up actually include, and is it worth it before a Schertz summer?
A real tune-up is not a filter change. We test the capacitor and contactor, which are the parts most likely to fail on the first 100-degree day, check refrigerant charge, clean the outdoor coil, inspect the blower and the drain line, measure the temperature split across the coil and verify the thermostat is doing what it says. The point is to find the part that is about to fail while it is still a planned repair. In a place with a six-month cooling season, that is worth it. Care Club members get two tune-ups a year on an enrolled system for $9.99 a month, with priority service and no dispatch fees.
My drains gurgle and back up after it rains. Why?
Gurgling after rain usually means water is getting into your sewer line from outside. On clay soil, a cracked or offset sewer line lets groundwater in when the ground is saturated, which fills the line, traps air and pushes it back up through the fixtures. Tree roots find the same cracks and make it worse. Clearing the line will get you through the week, but the honest fix is finding the damaged section. A drain cleaning visit with a camera shows whether it is a spot repair, a lining job or a full replacement, and you get the price for each before deciding.
I used to call Schmidt Mechanical. What happened to them?
Schmidt Mechanical in San Antonio is now part of Radiant. If you were a Schmidt customer, you can keep calling for the same service area with a larger team behind it: 24/7 availability including holidays, licensed and background-checked technicians, upfront pricing with no surprise fees, and the Home Comfort Guarantee on every job. Details on the transition are on our Schmidt Mechanical page, or just call and tell us you were a Schmidt customer.
What Our Customers Say
Don't just take our word for it — hear from our satisfied customers
★★★★★
Our 18 year old HVAC system finally gave out this past week, so we reached out to Radiant to see what could be done. They sent a tech out named Bryan the same day, and he did a great job looking over the entire HVAC system. He was friendly and helpful in explaining everything that he saw, and our options moving forward. We decided to replace the entire system, so we met with Jacob (same day thankfully) to find the best HVAC system for our needs. Jacob was friendly, professional, and did a great job explaining the different options on offer. Radiant was able to set-up next day install, which was much appreciated, because the temps were still going to be cold in the coming days.
The install team consisted of Carlos and Pablo, who were very courteous and professional, and were kind enough to answer any questions I had regarding the install. They did a great job installing our new HVAC system, and were tidy which is always appreciated! Before they left, they explained everything that had been done, and showed me photos of the work.
Our entire experience from start to finish was great. I appreciate that they send photos of who is coming to your home too. Friendly, kind, professional team members, and good work all the way around. Thanks Radiant!
The install team consisted of Carlos and Pablo, who were very courteous and professional, and were kind enough to answer any questions I had regarding the install. They did a great job installing our new HVAC system, and were tidy which is always appreciated! Before they left, they explained everything that had been done, and showed me photos of the work.
Our entire experience from start to finish was great. I appreciate that they send photos of who is coming to your home too. Friendly, kind, professional team members, and good work all the way around. Thanks Radiant!
★★★★★
This is the first time I’ve used radiant my neighbor recommended them…. I called them today and they set me up an appointment on the same day. I was totally shocked at that and the service call was only $39!!…. Highly recommend them Danielle showed up and he was a great guy and he put up with all my wishy-washiness and I had to hurry him because I was heading to church and he got caught in a lot of traffic getting here he even would’ve installed the part that broke but I Didn’t have the time tonight….. He was patient with me and just told me to call the office first thing in the morning and get a service call set up…. Thank you so much Radiant!!….
With another cold front coming in tomorrow now I just hope they can get me scheduled for a separate call tomorrow but I have a feeling they will. They are such a great company!!😊😊
With another cold front coming in tomorrow now I just hope they can get me scheduled for a separate call tomorrow but I have a feeling they will. They are such a great company!!😊😊
★★★★★
I had Radiant Plumbing replace my tankless water heater, damaged in the Feb. 2021 snowmageddon storm with a new unit. The process was smooth and professional from start to finish. The plumber, James, was extremely knowledgeable and thoroughly explained my options to me. The cost and time to perform the installation were just as estimated. When he was done, James explained how to maintain the system, what service would be needed and how to perform it, and answered all of my engineering geek questions. It was a thoroughly positive experience. I have used several different plumbers in Austin over the past 15 yrs, but my search is over - I will not hesitate to call Radiant next time and would recommend them unreservedly.
8/9/23 Update: I have subsequently used Radiant for a toilet repair, faucet installation (Danny), and drain work (Ezekiel) and they have continued to impress with knowledgeable, friendly plumbers and quality work.
8/9/23 Update: I have subsequently used Radiant for a toilet repair, faucet installation (Danny), and drain work (Ezekiel) and they have continued to impress with knowledgeable, friendly plumbers and quality work.
*Offers cannot be combined with other promotions or applied to dispatch fees. No cash value. Must present offer at time of service. Call for details.
