AC Refrigerant Leak Repair in Houston
AC refrigerant leak repair in Houston — electronic leak detection, coil repair, R-410A & R-22 recharge per pound. No stop-leak shortcuts. Call now.
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Quick answer: If your AC is low on refrigerant, it has a leak — refrigerant is not consumed like gas in a car. The right repair is to find the leak, fix it, then recharge by the pound. Expect $150–$500 for detection plus the repair and recharge cost. Call +1 (254) 256-1678 — and be suspicious of anyone who offers to just "top it off."
Signs of a refrigerant leak
- Warm or lukewarm air from the vents while the system runs constantly
- Ice building on the refrigerant lines, the outdoor unit, or the indoor coil
- Hissing or bubbling sounds near the indoor or outdoor unit
- The system runs longer and longer to reach the same temperature
- Higher electric bills with no change in usage
- Oily residue on fittings or coils — refrigerant carries oil with it
How a proper leak repair works
- Confirm the charge is low. Manifold pressures, superheat and subcooling tell the technician how much refrigerant is missing before any leak search begins.
- Find the leak. Electronic sniffers, nitrogen pressure tests and UV dye. The evaporator coil is the most common location — formicary corrosion from household air eats pinholes in the copper over years.
- Fix the point of failure. Schrader cores, fittings and rub-throughs are brazed or replaced. Coil leaks get an honest repair-vs-replace price for the coil itself.
- Evacuate and recharge by weight. The system is pulled to vacuum and recharged to the manufacturer's specified weight — measured in pounds on a scale, not "until it feels cold."
R-410A vs R-22: the price reality in Houston
Systems installed before about 2010 mostly run R-22, which the EPA phased out of production in 2020. Remaining supply is reclaimed refrigerant, which is why R-22 costs $90–$250 per pound in Houston while R-410A runs $50–$90. A full recharge of an R-22 system can cost more than $1,000 — which changes the repair math completely. If your system uses R-22 and has a significant leak, ask for the replacement quote alongside the repair quote before deciding.
Why "stop leak" products are not the answer
Search for AC leak repair and you will find Amazon and AutoZone sealants at the top — those are automotive products. In a home system, sealant circulates into the compressor and metering device, can clog the thermal expansion valve, and gives manufacturers grounds to deny a compressor warranty claim. It also makes the eventual proper repair more expensive, because the contaminated refrigerant must be recovered and the lines flushed. A real repair costs more today and far less over the life of the system.
What leak repair costs in Houston
| Repair | Typical Houston range | Note |
|---|---|---|
| Refrigerant leak detection | $150–$500 | |
| R-410A refrigerant recharge (per lb) | $50–$90 | |
| R-22 refrigerant recharge (per lb) | $90–$250 | R-22 phased out, supply-limited |
| Evaporator coil replacement | $900–$2300 | |
| Condenser coil replacement | $900–$2800 |
Ranges aggregated from HomeGuide, Angi and HomeAdvisor cost guides and Houston-area contractor pricing pages, collected October 2026.
Exact price only after diagnosis — call +1 (254) 256-1678. Full list on the Houston AC repair cost page.
Frequently asked questions
Can an AC refrigerant leak be repaired?
Yes, in most cases — but the honest sequence is find it, fix it, then recharge. Common repair points are Schrader valves, flare fittings, service ports and rub-through spots on line sets. Coil leaks can sometimes be repaired but are often better replaced. Just "topping off" without finding the leak wastes money: the refrigerant leaks back out, and it is illegal to knowingly vent refrigerant.
Is it worth fixing a refrigerant leak?
For R-410A systems under 10 years old, usually yes — leak search plus repair plus recharge typically runs $300–$1,000. For R-22 systems, do the math carefully: R-22 costs $90–$250 per pound and a system holds 6–15 pounds, so a recharge alone can exceed $1,000. On an R-22 system with a coil leak, replacement usually wins.
Do AC stop-leak products work?
The sealant products sold in auto parts stores are designed for cars, not home systems. In a central AC they can clog the metering device, contaminate the refrigerant circuit, and void the compressor warranty — turning a $600 leak repair into a $2,000 compressor job. Professional leak repair means locating and fixing the leak point, not injecting sealant.
How do technicians find a refrigerant leak?
With an electronic leak detector (sniffer), nitrogen pressure testing, UV dye, or soap solution on suspect joints. The evaporator coil — hidden inside your air handler — is the most common leak location and the reason proper detection takes 30–60 minutes, not five.
How much does it cost to recharge an AC in Houston?
R-410A runs about $50–$90 per pound installed in Houston; R-22 runs $90–$250 per pound because production ended in 2020 and supply is reclaimed only. A typical residential system holds 6–15 pounds, but a system that is only slightly low may need just 1–2 pounds. Any quote should state the per-pound price and how many pounds were added.
Need AC repair today?
Call now and we will connect you with a licensed Houston HVAC technician. Exact pricing is confirmed after on-site diagnosis — no surprises.